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Scientific Data Documentation
National Hospital Discharge Survey, 1996
 DSN: CC36.NHDS96
 Abstract
 This material provides documentation for users of the 1996 NHDS Public Use 
 Data Tape. The NHDS is conducted annually by the National Center for Health 
 Statistics (NCHS) and is a principal source of information on inpatient 
 hospital utilization in the United States.  
 Section I describes the survey and includes information on the history and 
 scope of the NHDS; the methodology followed, including data collection and 
 medical coding procedures; population  estimates; measurement errors and
 sampling errors. 

 Section II provides technical details of the tape. 
 Section III provides a detailed description of the contents of each data 
 record.  
 Appendix A defines certain terms used in this document; 
 Appendix B lists the ICD-9-CM Addenda; 
 Appendix C provides population estimates to allow the user to calculate rates; 
 Appendix D provides unweighted and weighted frequencies for selected descriptive 
 variables.

 

 I.  DESCRIPTION OF THE NATIONAL HOSPITAL DISCHARGE SURVEY
 INTRODUCTION.  
 This document and its appendices contain information for users of the 1996
 National Hospital Discharge Survey (NHDS) public use data file.  Conducted 
 annually by the National Center for Health Statistics, NHDS collects medical and 
 demographic information from a sample of discharge records selected from a national 
 sample of nonFederal, short-stay hospitals.  The data serve as a basis for calculating 
 statistics on inpatient hospital utilization in the United States.  For a description 
 of the survey design and data collection procedures, see below.  For a more detailed 
 description of the survey design, data collection procedures, and the estimation 
 process, see Reference 1.  Publications based on the data for each survey year can be 
 obtained from the Government Printing Office.
 HISTORY.  
 To provide more complete and precise information on the utilization of the Nation's
 hospitals and on the nature and treatment of illness among the hospitalized
 population, in 1962 the NCHS began exploring possibilities for surveying morbidity in
 hospitals.  A national advisory group was established.  The NCHS conducted planning
 discussions with other officials of the Public Health Service.  Hospitalization material 
 from the Survey Research Center of the University of Michigan, the American Hospital
 Association, and the Professional Activities Study was examined and evaluated.  In 1963, a
 study by the School of Public Health of the University of Pittsburgh under contract to the
 NCHS demonstrated the feasibility of an NHDS type of program.  An additional pilot study
 using enumerators from the Bureau of the Census was conducted in late 1964 and confirmed
 the University of Pittsburgh's findings.
 Finally, with advice and support from the American Hospital Association, the American
 Medical Association, individual experts, other professional groups, and officials of the 
 U.S. Public Health Service, the NCHS initiated the National Hospital Discharge Survey in 
 1964. 
 SURVEY METHODOLOGY
 SOURCE OF THE DATA.  
 The National Hospital Discharge Survey (NHDS) covers discharges from noninstitutional
 hospitals, exclusive of Federal, military, and Veterans Administration hospitals,
 located in the 50 States and the District of Columbia.  Only short-stay hospitals
 (hospitals with an average length of stay for all patients of less than 30 days) or those 
 whose specialty is general (medical or surgical) or children's general are included in the 
 survey.  These hospitals must also have six or more beds staffed for patient use.  These 
 criteria, used from 1988 through the current survey year, differ slightly from those used 
 prior to 1988.
 Beginning in 1988, the NHDS sampling frame consisted of hospitals that were listed in 
 the April 1987 SMG Hospital Market Tape (2), met the above criteria, and began accepting
 patients by August 1987.  For 1996 the sample consisted of 525 hospitals.  Of the 525
 hospitals, 18 were found to be out of scope (ineligible) because they went out of business
 or otherwise failed to meet the criteria for the NHDS universe.  Of the 507 inscope(eligible)
 hospitals, 480 hospitals responded to the survey.
 SAMPLE DESIGN AND DATA COLLECTION.  
 The NCHS has conducted the NHDS continuously since 1965.  The original sample was 
 selected in 1964 from a frame of short-stay hospitals listed in the National Master Facility 
 Inventory.  That sample was updated periodically with samples of hospitals that opened 
 later.  Sample hospitals were selected with probabilities ranging from certainty for 
 the largest hospitals to 1 in 40 for the smallest hospitals.  Within each sample 
 hospital, a systematic random sample of discharges was selected.  A report on the design 
 and development of the original NHDS has been published (1).
 In 1988, the NHDS was redesigned to provide geographic sampling comparability with
 other surveys conducted by the NCHS; to update the sample of hospitals selected into 
 the survey; and to maximize the use of data collected through automated systems.  The
 redesigned NHDS sample included with certainty all hospitals with 1,000 or more beds or
 40,000 or more discharges annually.  The remaining sample of hospitals was based on a
 stratified, three-stage design.  The first stage consisted of selecting 112 primary 
 sampling units (PSU's) that comprised a probability subsample of PSU's used in the 
 1985-94 National Health Interview Survey.  The second stage consisted of selecting 
 non-certainty hospitals from the sample PSU's.  At the third stage a sample of 
 discharges was selected by a systematic random sampling technique. 
 These changes in the survey may affect trend data.  That is, some of the differences 
 between NHDS statistics based on the 1965-87 sample and statistics based on the sample 
 drawn for the new design may be due to sampling error rather than actual changes in 
 hospital utilization.  
 Two data collection procedures were used for the survey.  The first was a manual system 
 of sample selection and data abstraction, used for approximately 62 percent of the 
 responding hospitals.   The second was an automated method, used for approximately 38 
 percent of the respondent hospitals, that involved the purchase of computerized data 
 tapes from abstracting service organizations, state data systems, or from the hospitals 
 themselves.
 In the manual system, the sample selection and the transcription of information from 
 the hospital records to abstract forms were performed at the hospitals.  Of the hospitals 
 using this system in 1996, about 34 percent had the work performed by their own medical 
 records staff.  In the remaining hospitals using the manual system, personnel of the 
 U.S. Bureau of the Census did the work on behalf of NCHS.  The completed forms, along 
 with sample selection control sheets, were forwarded to NCHS for coding, editing, and 
 weighting. 
 For the automated system, NCHS purchased tapes containing machine-readable medical
 record data from which records were systematically sampled by NCHS.
 The Medical Abstract Form (Figure 1) and the automated data contain items relating to 
 the personal characteristics of the patient, including birth date or age, sex, race, 
 and marital status, but not name and address; administrative information, including 
 admission and discharge dates, discharge status, and medical record number; and medical 
 information, including diagnoses and surgical and nonsurgical procedures.  Since 1977, 
 patient zip code, expected source of payment, and dates of surgery have also been 
 collected.  (The medical record number, date of birth, and patient zip code are 
 confidential information and are not available to the public.)
 MEDICAL CODING AND EDIT. 
 The medical information that was recorded manually on the sample patient abstracts
 was coded centrally by NCHS staff.  A maximum of seven diagnostic codes was assigned
 for each sample abstract.  In addition, if the medical information included 
 surgical or nonsurgical procedures, a maximum of four codes for these procedures
 was assigned.  The system currently used for coding the diagnoses and procedures
 on the medical abstract forms as well as on the commercial abstracting services
 data tapes is the International Classification of Diseases, 9th Revision, 
 Clinical Modification, or ICD-9-CM (3).
 NHDS usually presents diagnoses and procedures in the order they are listed on the 
 abstract form or obtained from abstract services; however, there are exceptions.  
 For women discharged after a delivery, a code of V27 from the supplemental 
 classification is entered as the first-listed code, with a code designating either 
 normal or abnormal delivery in the second-listed position.  In another exception, a 
 decision was made to reorder some acute myocardial infarction diagnoses.  If an 
 acute myocardial infarction is listed with other circulatory diagnoses and is other 
 than the first entry, it is reordered to first position.  If a symptom appears as 
 a first-listed code and a diagnosis appears as a secondary code, the diagnosis 
 replaces the symptom which is moved back.  

 Figure 1.  Medical abstract for the 1996 National Hospital Discharge Survey
 Following conversion of the data on the medical abstract to computer tape and 
 combining it with the automated data tapes, a final medical edit was accomplished 
 by computer inspection and by a manual review of rejected records.  Priority was 
 given to medical information in the editing decision.
 A new edit program was developed for the NHDS and was implemented beginning in 
 the 1996 data year.  The updated edit program, while following the same general 
 specifications as the previous edit program, was designed to make as few changes 
 as possible in the data.  Thus, there may be some minor anomalies in certain areas 
 which would be apparent when examining data over time, performing trend analyses, 
 or examining combinations of variables.  Particular features of the new edit 
 program which may affect certain variables  are:
An improved imputation procedure for missing age and sex data was 
developed, which  maintains the known distribution of these variables, 
according to categories of the First-Listed Diagnosis.
There is no longer a re-ordering of the procedure codes.
Principal and additional expected sources of payment are no longer 
re-ordered, with one exception:  "Self-Pay" is listed as the principal 
source only if there are no other sources, or the only other source is 
"Not Stated"; otherwise it must be listed after every other source 
(except "Not Stated").
An arbitrary month of admission is no longer assigned to records 
received from abstract services which do not provide the exact date 
of admission and discharge.
 Users of the National Hospital Discharge Survey (NHDS) diagnostic and/or 
 procedure data, which is coded to the ICD-9-CM, must take into account annual 
 ICD-9-CM addenda.  The addenda lists new codes, new fourth or fifth digits to 
 existing codes, as well as other modifications.  Changes go into effect 
 October 1 of the calendar year.  A list of the changes for 1986 through 1995 
 are listed in Appendix B.  All coding of the 1996 data is consistent with the 
 ICD-9-CM and the addendum effective October 1, 1995.  Information provided by
 automated systems for the last three months of 1996 which was coded using the 
 October 1996 addendum was converted back to the previous code assignment.  This 
 was done in order to prevent NHDS data users from mistaking partial year 
 estimates for annual estimates. 
 The Uniform Hospital Discharge Data Set (UHDDS).  Starting with 1979 data, the 
 NHDS has followed guidelines of the Uniform Hospital Discharge Data Set (UHDDS) 
 within the confines of its contractual agreement with participating hospitals.  
 The UHDDS is a minimum data set of items uniformly defined (4).  These items were 
 selected on the basis of their usefulness to a broad range of organizations and 
 agencies requiring hospital information, uniformity of definition, and general 
 availability from medical records and abstract services.
 POPULATION ESTIMATES.  
 Appendix C shows population estimates provided by the U.S. Bureau of the Census.
 The estimates are of the U.S. civilian resident population on July 1 of the
 data year.  These population estimates are consistent with those published
 in Current Population Reports, Series P-25; however, they are not official
 population estimates of the Bureau of the Census.
 MEASUREMENT ERRORS.   
 As in any survey, results are subject to nonsampling or measurement
 errors, which include errors due to hospital nonresponse, missing abstracts,
 information incompletely or inaccurately recorded on abstract forms, and
 processing errors.  A very small proportion, (less than one-half of one 
 percent) of the discharge records failed to include the sex, age, or date of 
 birth of the patient. If the hospital record did not state either the age or
 sex of patient, it was imputed by assigning an age or sex value according to 
 the  specifications described earlier.  In a very few cases (about a quarter of 
 a percent of the records), the age or sex was edited, because it was inconsistent 
 with the diagnosis.  Data on race was missing for 23 percent of the discharges, 
 and no attempt was made to impute for these missing values.
 During 1996, 15 percent of the records lacked the day of admission or day of 
 discharge, but included a length of stay.  Because the new edit program does not 
 require exact admission or discharge dates if length of stay is provided on the 
 record, no attempt was made to impute for these missing values.  
 Other edit and imputation procedures may have been applied to data in the NHDS 
 collected in automated form.
 SAMPLING ERRORS AND ROUNDING OF NUMBERS.   
 The standard error is primarily a measure of sampling variability that occurs
 by chance because only a sample rather than the entire universe is surveyed.
 The relative standard error of the estimate is obtained by dividing the standard
 error by the estimate itself.  The resulting value is multiplied by 100, so
 the relative standard error is expressed as a percent of the estimate.  Estimates 
 of sampling variability were calculated with SUDAAN software, which computes 
 standard errors by using a first-order Taylor series approximation of the deviation of 
 estimates from their expected values.  A description of the software and the approach it 
 uses was published by Shah, Barnwell, and Bieler (5).
 RELATIVE STANDARD ERRORS FOR AGGREGATE ESTIMATES
 Parameters for calculating approximate relative standard errors for aggregate estimates are
 presented in Table 1.  To derive error estimates that would be applicable to a wide variety
 of statistics, numerous estimates and their variances were produced.  A regression model 
 was then used to produce best-fit curves, based on the empirically determined relationship
 between the size of an estimate X and its relative variance.  The relative standard error of
 an estimate X [RSE(X)], expressed as a percent, may be calculated from the formula:
RSE (X) = 100 * SQRT{ a + b/X } 
 with a and b provided in Table 1.  
 For example, in 1996 the estimated number of discharges from short-stay hospitals for
 females with a first-listed diagnosis of atherosclerotic heart disease (ICD-9-CM code 414.0)
 was 416,000.  Using the applicable constants from Table 1 for estimates by sex produces:
RSE (416,000) = 100 * SQRT{.00157 + (384.999/416,000)}
                            RSE(416,000)  = 5.0 %
 The relative standard error for the estimate of interest is 5.0 percent.  From this the 
 standard error is obtained by multiplying the relative standard error by the estimate:
                     SE(416,000)  = 416,000 * 5.0%  = 20,800     
 The standard error can be employed to generate confidence intervals for statistical 
 testing.  In this example, the 95% confidence interval for the estimate of female 
 inpatients with a first-listed diagnosis of atherosclerotic heart disease is:
               (416,000 - 2*20,800)  <->   (416,000 + 2*20,800)
                            374,400  <-> 457,600 
 Relative Standard Error for Estimates of Percents
 Approximate relative standard errors for estimates of percents may be calculated from 
 Table 1 also.  The relative standard error for a percent, 100 p (0<p<1), (expressed as 
 a percent), may be calculated using the formula:
RSE(p) = 100 *  SQRT{b * (1 - p)/(p * X)} 
 where 100p is the percent of interest, X is the base of the percent, and b is the 
 parameter b in the formula for approximating the RSE(X).  The values for b are given in 
 Table 1.
 For example, in 1996 the estimated number of discharges from short-stay hospitals which
 were female was 18,435,000.  This is 60.4 percent of the estimated 30,545,000 discharges
 for that year.  Using the applicable constants from Table 1 for estimates by sex produces:
RSE(.604) =  100 *  SQRT{384.999 * (1 - .604)/(.604 * 30545000)} 
                            RSE(.604)  =  0.2875%
 The relative standard error for the estimate of interest is 0.2875 percent.  From this the
 standard error is obtained by multiplying the relative standard error by the estimate:
                      SE(.604)  =  .604* 0.2875%  =  .0017        
 The standard error can be employed to generate confidence intervals for statistical testing. 
 In this example, the 95% confidence interval for the estimate of the percentage of female
 inpatients is:
               (  .604 - 2*.0017)   <->   (.604 + 2*.0017)
                            .6006   <->   .6074
 or, equivalently,          60.06%   <-> 60.74%
 Table 1.  Parameter values for relative standard errors for National Hospital 
           Discharge Survey aggregate statistics by statistic type:  
           United States, 1996

Number of discharges or
First-Listed Diagnosis

Number of
All-Listed Diagnoses

Number of
Days of Care

Number of
All-Listed Procedures

Characteristic

a

b

a

b

a

b

a

b

TOTAL

0.00135

355.278

0.00315

340.624

0.00422

961.321

0.00265

367.004

Sex

Male

0.00153

328.232

0.00412

323.367

0.00594

1,104.936

0.00347

330.761

Female

0.00157

384.999

0.00174

322.104

0.00226

1,341.036

0.00278

331.207

Age

Under 15 years

0.01700

229.443

0.01958

289.646

0.02006

722.724

0.01858

236.345

15-44 years

0.00158

322.959

0.00265

328.234

0.00317

997.933

0.00398

298.470

45-64 years

0.00147

321.327

0.00235

302.405

0.00323

1,186.155

0.00373

293.436

65 years and over

0.00157

340.854

0.00196

309.446

0.00296

1,593.926

0.00252

277.559

Region

Northeast

0.00437

213.840

0.01157

277.233

0.00778

632.459

0.00668

234.728

Midwest

0.01253

384.988

0.00819

183.086

0.00783

701.464

0.00821

154.838

South

0.00358

350.427

0.00388

306.111

0.00671

923.876

0.00441

270.511

West

0.00519

389.105

0.00822

420.446

0.01139

1,093.364

0.00829

369.526

Race

White

0.00288

344.126

0.00424

396.381

0.00683

958.234

0.00446

378.885

Black

0.00698

240.332

0.00771

276.320

0.01082

754.460

0.00817

237.593

All other

0.02162

208.929

0.02079

230.003

0.03905

304.882

0.02340

179.421

Race not stated

0.01766

230.613

0.01928

200.987

0.02187

627.572

0.01829

212.222

Expected source of payment

Worker's compensation

0.00509

304.826

0.00931

283.960

0.00669

1,467.813

0.01162

277.455

Medicare

0.00174

341.447

0.00210

326.982

0.00327

1,626.007

0.00244

286.803

Medicaid

0.00441

278.567

0.01071

244.514

0.00744

1,047.394

0.00610

266.303

Payment not stated

0.01795

324.671

0.02042

310.113

0.02161

2,341.849

0.02469

260.039

Other government payments

0.00212

324.673

0.00319

323.036

0.00322

1,102.728

0.00318

289.470

Private insurance

0.00432

286.980

0.00588

297.950

0.01006

747.057

0.01101

232.298

Self pay

0.02025

156.446

0.02058

171.334

0.03048

309.822

0.02773

134.803

PRESENTATION OF ESTIMATES.  
Publication of estimates for the NHDS is based on the relative standard error of
the estimate and the number of sample records on which the estimate is based
(referred to as the sample size).  Estimates are not presented in NCHS reports unless
a reasonable assumption regarding the probability distribution of the sampling error is
possible.
                                
 Based on consideration of the complex sample design of the NHDS, the following
 guidelines are used for presenting the NHDS estimates:
                                
     If the sample size is less than 30, the value of the estimate is not 
     reported.                                
     If the sample size is 30-59, the value of the estimate is reported 
     but should not be assumed reliable.
                                
     If the sample size is 60 or more and the relative standard error is 
     less than 30 percent, the estimate is reported.                                 
     If the sample size is 60 or more but the relative standard error is 
     over 30 percent, the estimate is reported but should not be assumed 
     reliable.
                                
 MONTHLY AND SEASONAL ESTIMATES UNDER THE NEW DESIGN.  
 An important difference between the old and new designs is the method used to adjust
 for nonresponse.  In the old design, weights for responding hospitals were adjusted
 each month to account for hospitals that did not respond for that month.  In the
 new design, the type of nonresponse adjustment applied depended on whether the
 hospital was considered a nonrespondent or partial respondent.  A nonresponding
 hospital was one which failed to provide at least half of the expected number of
 discharges for at least half of the months for which it was inscope.   In this case,
 weights of discharges from hospitals similar to the nonresponding hospital
 were inflated to account for discharges of the nonrespondent hospital.  However, this
 adjustment was performed just once, after the close out of the survey for the year, instead
 of monthly as before.                                  
 For partially responding hospitals, one or both of two adjustments were made.  If the
 hospital provided at least half, but not all, of the expected number of abstracts for a given
 month, the weights of the abstracts actually collected for that month were inflated to
 account for the missing abstracts.  If fewer than half of the expected number of abstracts
 were provided, the weights of the abstracts provided were inflated by a factor of two, then
 a second adjustment was made to account for the excess nonresponse.  In the second
 adjustment, the weights of the discharges in the hospital's respondent months were inflated
 by ratios that varied by category of first-listed ICD-9-CM diagnostic code.  This
 adjustment ratio was based on the hospital's month(s) of nonresponse and the month-by-
 month distributions of first-listed diagnostic groups among discharges from hospitals which
 responded for all twelve months.  The ratio accounts for the seasonality in the occurrence
 of the first-listed diagnostic groups for annual statistics, but not for partial year estimates. 
 As a result monthly and seasonal estimates may be skewed.  While the effect is believed
 to be small, it is recommended that partial year estimates NOT be produced.  In the 1996
 NHDS, 76 percent of the 480 responding hospitals provided data for all twelve months,
 and 95 percent provided at least 9 months of data. 
                                
 HOW TO USE THE DATA TAPE.  
 The NHDS records are weighted to allow inflation to national or regional estimates.
 The weight applied to each record is found in tape location 21-25.  To produce an 
 estimate of the number of discharges, the weights for the desired records must be
 summed.  To produce an estimate for number of days of care, the weight must be
 multiplied by the days of care (tape location 13-16) and these products are summed.
 Average length of stay data can be obtained by dividing the days of care by the
 number of discharges as calculated above.                                
 Appendix D contains unweighted and weighted frequencies for selected variables on the
 data tape.  These may be used as a cross-check when processing the data on the user's
 system.
                                
 DIAGNOSIS-RELATED GROUPS (DRGs).  
 Many users of the NHDS data tapes have expressed an interest in converting the
 data to DRGs.  This has been done using DRG Grouper Programs obtained from
 the Health Care Financing Administration.  The DRGs and the DRG Grouper Programs
 were developed outside of the National Center for Health Statistics; any questions
 about DRGs, other than specific questions about how they relate
 to NHDS data, should be addressed elsewhere.
                                
 QUESTIONS.  
 Questions concerning data on the tape should be directed to Maria Owings,
 Ph.D., Hospital Care Statistics Branch, Division of Health Care Statistics, National Center
 for Health Statistics, Presidential Building, Room 956, 6525 Belcrest Road, Hyattsville,
 Maryland  20782, (301)-436-7125.
                                         
 REFERENCES
 1. National Center for Health Statistics:  Development of the design of the NCHS 
    Hospital Discharge Survey, by W. R. Simmons.  Vital and Health  Statistics.  PHS 
    Pub. No. 1000, Series 2-No. 39.  Public Health Service.  Washington.  U.S. Government 
    Printing Office, Sept. 1970.
 2. SMG Hospital Marketing Group, Inc. 1989. Hospital Market Database.  Healthcare
    Information Specialists, 1342 North LaSalle Drive, Chicago, Illinois.
 3. National Center for Health Statistics:  International Classification of Diseases, 
    9th Revision, Clinical Modification.  DHHS Pub. No. (PHS) 80-1260.  Public Health 
    Service.   Washington.  U.S. Government Printing Office, Sept. 1980.
 4. Office of the Secretary, Department of Health and Human Services:  Health Information
    Policy Council: 1984 Revision of the Uniform Hospital Discharge Data Set.  Federal
    Register, Volume 50, No. 147. July 31, 1985.
 5. Shah, Babubhai.V., Beth G. Barnwell, and Gayle S. Bieler.  SUDAAN User's Manual:
    Software for Analysis of Correlated Data, Release 6.40.   Research Triangle 
    Institute: Research Triangle Park, N.C. 1996.
 II.  TECHNICAL DESCRIPTION OF TAPE
 Data Set Name-------------------------------------------BG00.NHDS96.PU
 Number of REELS or CARTRIDGES----------------------------------------1
 Number of Recording Tracks, REEL-------------------------------------9
 Number of Recording Tracks, CARTRIDGE-------------------------------18
 Density for REEL (bpi)-------------------------------------------6,250
 Density for CARTRIDGE (bpi)-------------------------------------38,000
 Language--------------------------------------------------------EBCDIC
 Parity-------------------------------------------------------------Odd
 Record Length-------------------------------------------------------81
 Block Size------------------------------------------------------16,200
 Number of Records----------------------------------------------282,008

 III.  RECORD FORMAT: Location and Coding of Data Elements
 This section provides detailed information for each sampled record on the
 tape, with a description of each item included in the record. Data elements
 are arranged sequentially according to their physical location on the tape
 record.  Unless otherwise stated in the Item Description, the data are 
 derived from the abstract form or from automated sources.  The SMG Hospital
 Market Tape and the hospital interview are alternate sources of data; some
 other items are computer generated.
 Item       Tape         Number of
 Number     Location     Positions   Item Description and Codes
  1            1-2            2         Survey Year:        96
  2             3             1         Newborn Status:   1 = Newborn
                                                          2 = Not Newborn
  3             4             1         Units for Age:    1 = Years
                                                          2 = Months
                                                          3 = Days
  4            5-6            2         Age in years, months, or days: 
                                                          If Units = Years: 0-99*
                                                          If Units = Months:01-11
                                                          If Units = Days:  00-31
  5             7             1         Sex:              1 = Male
                                                          2 = Female
  6             8             1         Race:             1 = White  
                                                          2 = Black
                                                          3 = American Indian/Eskimo
                                                          4 = Asian/Pacific Islander
                                                          5 = Other
                                                          9 = Not Stated
  7             9             1         Marital Status:   1 = Married
                                                          2 = Single
                                                          3 = Widowed
                                                          4 = Divorced
                                                          5 = Separated
                                                          9 = Not Stated
  8           10-11           2      Month of Admission:  01-12:  January to December
                                                             99: Missing
  
 --------------------------------------------------------------------------------------
 * Ages 100 and over were recoded to 99.
 Item         Tape         Number of
 Number       Location     Positions    Item Description and Codes
   9            12           1          Discharge Status:   1 = Routine/Discharged Home
                                                            2 = Left Against Medical Advice
                                                            3 = Discharged/Transferred to 
                                                                 Short-Term Facility 
                                                            4 = Discharged/Transferred to
                                                                 Long-Term Care Institution
                                                            5 = Alive, Disposition Not Stated
                                                            6 = Dead
                                                            9 = Not Stated or Not Reported  
  10          13-16          4          Days of Care:
                                           Use to calculate number of days of care;
                                           Values of zero generated by the computer
                                           from admission and discharge dates were
                                           changed to one.  (Discharges for which
                                           dates of admission and discharge are the
                                           same are identified in Item Number 11.)
  11             17          1          Length of Stay Flag:   0 = Less than 1 day
                                                               1 = 1 day or more
  12             18          1          Geographic Region:     1 = Northeast
                                                               2 = Midwest
                                                               3 = South
                                                               4 = West
  13             19          1           Number of Beds, Recode: 1 = 6-99
                                                                 2 = 100-199
                                                                 3 = 200-299
                                                                 4 = 300-499
                                                                 5 = 500 and over
  14             20          1           Hospital Ownership:   1 = Proprietary
                                                               2 = Government
                                                               3 = Nonprofit, including 
                                                                   Church
 
 Item       Tape         Number of
 Number     Location     Positions    Item Description and Codes
  15         21-25           5        Analysis Weight:  Use to obtain weighted estimates
  16           26            1        Principal Expected Source of Payment:
                                                              0 = No Charge                            
                                                              1 = Workmen's Compensation
                                                              2 = Medicare
                                                              3 = Medicaid
                                                              4 = Other Govt Payments, 
                                                                  incl. Title V
                                                              5 = Blue Cross
                                                              6 = Other Private/Commercial 
                                                                  Insurance
                                                              7 = Self-Pay
                                                              8 = Other
                                                              9 = Not Stated 
  17           27           1         Secondary Expected Source of Payment:
                                       Same coding as item 16
  18         28-32          5        Diagnosis Code #1 *
  19         33-37          5        Diagnosis Code #2 *
  20         38-42          5        Diagnosis Code #3 *
  21         43-47          5        Diagnosis Code #4 *
  22         48-52          5        Diagnosis Code #5 *
  23         53-57          5        Diagnosis Code #6 *
  24         58-62          5        Diagnosis Code #7 *
  25         63-66          4        Procedure Code #1 *
  26         67-70          4        Procedure Code #2 *
  27         71-74          4        Procedure Code #3 *
  28         75-78          4        Procedure Code #4 *
  29         79-81          3        DRG, Grouper Version 13.0
 ------------------------------------------------------------------------------
 * Codes are in compliance with the International Classification of Diseases, 
   9th Revision, Clinical Modification, (ICD-9-CM).  For diagnosis codes, there 
   is an implied decimal between positions 3 and 4.  For E-codes, the implied 
   decimal is between the 4th and 5th position.  For inapplicable 4th or 5th 
   digits, a dash is inserted.  For procedure codes, there is an implied decimal 
   between positions 2 and 3.  For inapplicable 3rd or 4th digits, a dash is 
   inserted.
 -------------------------------------------------------------------------------

 If you have any suggestions about how to better provide NHDS data by DRGs to 
 NHDS data users, please write to Maria Owings, NCHS, Room 956, 6525 Belcrest Road, 
 Hyattsville, MD  20782.  Your assistance is greatly appreciated.
 APPENDIX A
 DEFINITION OF TERMS
 Terms relating to hospitals and hospitalization
 Hospitals: Short stay hospitals or hospitals whose specialty is general (medical 
 or surgical), or children's general.  Hospitals must have 6 beds or more staffed 
 for patients use.  Federal hospitals and hospital units of institutions are not 
 included.
 Type of ownership of  hospital: The type of organization that controls and 
 operates the hospital.  Hospitals are grouped as follows:
          Not for Profit: Hospitals operated by a church or another not for 
                          profit organization.
          Government: Hospitals operated by State and local government.
          Proprietary: Hospitals operated by individuals, partnerships, or 
                       corporations for profit.
 Patient: A person who is formally admitted to the inpatient service of a short: stay 
 hospital for observation, care, diagnosis, or treatment, or by birth. 
 Discharge: The formal release of a patient by a hospital; that is, the termination of 
 a period of hospitalization by death or by disposition to place of residence, nursing 
 home, or another hospital.  The terms "discharges" and "patients discharged" are used 
 synonymously.
 Discharge rate: The ratio of the number of hospital discharges during the year to the 
 number of persons in the civilian population on July 1 of that year.
 Days of care: The total number of patient days accumulated at time of discharge by 
 patients discharged from short: stay hospitals during a year.  A stay of less than 1 day 
 (patient admission and discharge on the same day) is counted as 1 day in the summation of 
 total days of care.  For patients admitted and discharged on different days, the number 
 of days of care is computed by counting all days from (and including) the date of 
 admission to (but not including) the date of discharge.
 Rate of days of care: The ratio of the number of patient days accumulated at time of 
 discharge to the number of persons in the civilian population on July 1 of that year.
 Average length of stay: The total number of days of care accumulated at time of discharge 
 by patients discharged during the year, divided by the number of patients discharged. 
 Terms relating to diagnoses and procedures
 Discharge diagnoses: One or more diseases or injuries (or some factor that influences 
 health status and contact with health services that is not itself a current illness or 
 injury) listed by the attending physician on the medical record of a patient.  In the NHDS, 
 discharge (or final) diagnoses listed on the face sheet (summary sheet) of the medical 
 record are transcribed in the order listed.  Each sample discharge is assigned a maximum of 
 seven five-digit codes according to ICD-9-CM (2).
 Principal diagnosis: The condition established after study to be chiefly responsible for
 occasioning the admission of the patient to the hospital for care.
 First- listed diagnosis: The coded diagnosis identified as the principal diagnosis or listed 
 first on the face sheet of the medical record if the principal diagnosis cannot be identified. 
 The number of first: listed diagnoses is equivalent to the number of discharges
 Procedure: One or more surgical or nonsurgical operations, procedures, or special treatments
 listed by the physician on the medical record.  In the NHDS, all terms listed on the face sheet
 (summary sheet) of the medical record under the caption "operation," "operative procedures,"
 "operations and/or special treatment," and the like are transcribed in the order listed.  
 A maximum of four procedures are coded.
 Rate of procedures: The ratio of the number of all: listed procedures during a year to the 
 number of persons in the civilian population on July 1 of that year determines the rate of 
 procedures.
 Demographic terms
 Age: Refers to the age of the patient on the birthday prior to admission to the hospital 
 inpatient service.
 Population: Civilian population is the resident population excluding members of the Armed
 Forces.
 Geographic regions: Hospitals are classified by location in one of the four geographic regions 
 of the United States corresponding to those used by the U.S. Bureau of the Census:
 U.S. CENSUS REGIONS
NORTHEASTMIDWESTSOUTHWEST
MaineMichiganDelawareMontana
New HampshireOhioMarylandIdaho
VermontIllinoisDistrict of ColumbiaWyoming
MassachusettsIndianaVirginiaColorado
ConnecticutWisconsinWest VirginiaNew Mexico
Rhode IslandMinnesotaNorth CarolinaArizona
New YorkIowaSouth CarolinaUtah
New JerseyMissouriGeorgiaNevada
PennsylvaniaNorth DakotaFloridaWashingtion
South DakotaKentuckyOregon
NebraskaTennesseeCalifornia
KansasAlabamaHawaii
MississippiAlaska
Arkansas
Louisiana
Oklahoma
 
 APPENDIX B 
 The International Classification of Diseases, 9th Revision, Clinical Modification, 
 which has been used for coding NHDS data since 1979, undergoes annual updating.  
 Assignment of new diagnostic and procedure codes, fourth and fifth digit expansion 
 of codes, as well as code deletions, are contained in addenda developed by the 
 ICD-9-CM Coordination and Maintenance Committee and approved by the Director of 
 NCHS and the Administrator of the Health Care Financing Administration.  Addenda 
 to the ICD-9-CM become effective on October 1 of the calendar year and have been 
 released for 1986 through 1996. 
 As described earlier in this document, the 1996 NHDS involved two data collection 
 modes:  manual and abstract service.  All data collected manually were coded using 
 the third edition of the ICD-9-CM, which includes the addenda for 1986 through 1995.  
 Data collected via abstract service were coded using two different ICD-9-CM revisions.  
 For the first 9 months of 1996, the ICD-9-CM including the addendum of October 1, 
 1986-95 was used; for the last 3 months the October 1996 addendum was used.  Therefore, 
 data provided by automated systems for the last three months of 1996 was converted 
 back to the code assignment under the October 1995 addendum.  This was done in order 
 to prevent NHDS data users from mistaking partial year estimates for annual estimates.   
 In order to assist users in data retrieval, a conversion table is  provided that shows 
 the date of introduction of each new code and the previously assigned code equivalent, 
 which had been used for reporting the selected diagnosis or procedure prior to issuance 
 of the new code.
DIAGNOSIS CODES
Effective
Current code(s) assignment October 1 Previous code(s) assignment
005.81 1995 005.8
005.89 1995 005.8
008.00-008.09 1992 008.0
008.43-008.47 1992 008.49
008.61-008.69 1992 008.6
041.00-041.09 1992 041.0
041.10-041.19 1992 041.1
041.81-041.89 1992 041.8
041.86 1995 041.84
042 1994 042.0-042.2,042.9,043.0-043.3,
043.9,044.0,044.9
042.0-042.9 1986 279.19
043.0-043.9 1986 279.19
044.0-044.9 1986 279.19
070.20-070.21 1991 070.2
070.22 1994 070.20
070.23 1994 070.21
070.30-070.31 1991 070.3
070.32 1994 070.30
070.33 1994 070.31
070.41-070.49 1991 070.4
070.44 1994 070.41
070.51-070.59 1991 070.5
070.54 1994 070.51
077.98-077.99 1993 077.9
078.10-078.11,078.19 1993 078.1
078.88 1993 078.89
079.4 1993 079.8
079.50-079.53,079.59 1993 079.8
079.81 1995 079.89
079.88-079.89 1993 079.8
079.98-079.99 1993 079.9
088.81,088.89 1989 088.8
088.82 1993 088.89
099.40-099.49 1992 099.4
099.50-099.59 1992 078.89
112.84-112.85 1992 112.89
114.4-114.5 1993 114.3
176.0-176.9 1991 173.0-173.9
203.00 1991 203.0
203.01 1991 V10.79
203.10 1991 203.1
203.11 1991 V10.79
203.80 1991 203.8
203.81 1991 V10.79
204.00 1991 204.0
204.01 1991 V10.61
204.10 1991 204.1
204.11 1991 V10.61
204.20 1991 204.2
204.21 1991 V10.61
204.80 1991 204.8
204.81 1991 V10.61
204.90 1991 204.9
204.91 1991 V10.61
205.00 1991 205.0
205.01 1991 V10.62
205.10 1991 205.1
205.11 1991 V10.62
205.20 1991 205.2
205.21 1991 V10.62
205.30 1991 205.3
205.31 1991 V10.62
205.80 1991 205.8
205.81 1991 V10.62
205.90 1991 205.9
205.91 1991 V10.62
206.00 1991 206.0
206.01 1991 V10.63
206.10 1991 206.1
206.11 1991 V10.63
206.20 1991 206.2
206.21 1991 V10.63
206.80 1991 206.8
206.81 1991 V10.63
206.90 1991 206.9
206.91 1991 V10.63
207.00 1991 207.0
207.01 1991 V10.69
207.10 1991 207.1
207.11 1991 V10.69
207.20 1991 207.2
207.21 1991 V10.69
207.80 1991 207.8
207.81 1991 V10.69
208.00 1991 208.0
208.01 1991 V10.60
208.10 1991 208.1
208.11 1991 V10.60
208.20 1991 208.2
208.21 1991 V10.60
208.80 1991 208.8
208.81 1991 V10.60
208.90 1991 208.9
208.91 1991 V10.60
237.70-237.72 1990 237.7
250.02 1993 250.90
250.03 1993 250.91
250.12 1993 250.10
250.13 1993 250.11
250.22 1993 250.20
250.23 1993 250.21
250.32 1993 250.30
250.33 1993 250.31
250.42 1993 250.40
250.43 1993 250.41
250.52 1993 250.50
250.53 1993 250.51
250.62 1993 250.60
250.63 1993 250.61
250.72 1993 250.70
250.73 1993 250.71
250.82 1993 250.80
250.83 1993 250.81
250.92 1993 250.90
250.93 1993 250.91
278.00-278.01 1995 278.0
283.10-283.11,283.19 1993 283.1
305.1 1994 305.10,305.11,305.12,
305.13 (delete code)
312.81-312.82,381.89 1994 312.8
320.81-320.89 1992 320.8
333.92-333.93 1994 333.99
337.20-337.22,337.29 1993 337.9
342.00-342.02 1994 342.0
342.10-342.12 1994 342.1
342.80-342.82 1994 342.9
342.90-342.92 1994 342.9
344.00-344.04,344.09 1994 344.0
344.30-344.32 1994 344.3
344.40-344.42 1994 344.4
344.81,344.89 1993 344.8
345.00-345.01 1989 345.0
345.10-345.11 1989 345.1
345.40-345.41 1989 345.4
345.50-345.51 1989 345.5
345.60-345.61 1989 345.6
345.70-345.71 1989 345.7
345.80-345.81 1989 345.8
345.90-345.91 1989 345.9
346.00-346.01 1992 346.0
346.10-346.11 1992 346.1
346.20-346.21 1992 346.2
346.80-346.81 1992 346.8
346.90-346.91 1992 346.9
355.71 1993 354.4
355.79 1993 355.7
371.82 1992 371.89
374.87 1990 374.89
403.00-403.01 1989 403.0
403.10-403.11 1989 403.1
403.90-403.91 1989 403.9
404.00-404.03 1989 404.0
404.10-404.13 1989 404.1
404.90-404.93 1989 404.9
410.00-410.02 1989 410.0
410.10-410.12 1989 410.1
410.20-410.22 1989 410.2
410.30-410.32 1989 410.3
410.40-410.42 1989 410.4
410.50-410.52 1989 410.5
410.60-410.62 1989 410.6
410.70-410.72 1989 410.7
410.80-410.82 1989 410.8
410.90-410.92 1989 410.9
411.81 1989 410.9
411.89 1989 411.8
414.00-414.01 1994 414.0
414.02-414.03 1994 996.03
415.11 1995 997.3 & 415.1
415.19 1995 415.1
429.71 1989 410.0-410.9
429.79 1989 410.0-410.9
433.00-433.01 1993 433.0
433.10-433.11 1993 433.1
433.20-433.21 1993 433.2
433.30-433.31 1993 433.3
433.80-433.81 1993 433.8
433.90-433.91 1993 433.9
434.00-434.01 1993 434.0
434.10-434.11 1993 434.1
434.90-434.91 1993 434.9
435.3 1995 435.0 & 435.1
437.7 1992 780.9
440.20-440.22 1992 440.2
440.23 1993 440.20 & 707.1 or 707.8 or 707.9
440.24 1993 440.20 & 785.4
440.29 1993 440.20
440.30-440.32 1994 996.1
441.00-441.03 1994 441.0
441.6 1993 441.1 & 441.3
441.7 1993 441.2 & 441.4
446.20-446.21,446.29 1990 446.2
451.82-451.84 1993 451.89
458.2 1995 997.9 & 458.9
482.30-482.39 1992 482.3
482.81-482.89 1992 482.8
483.0 1992 483
483.8 1992 483
491.20-491.21 1991 491.2
493.20 1989 493.90
493.21 1989 493.91
512.1 1994 997.3
518.81 1987 799.1
518.82-518.89 1987 518.8
524.00-524.09 1992 524.0
524.10-524.19 1992 524.1
524.60-524.69 1991 524.6
524.70-524.79 1992 524.8
530.10-530.11, 530.19 1993 530.1
530.81 1993 530.1
530.82-530.84, 530.89 1993 530.8
535.00-535.01 1991 535.0
535.10-535.11 1991 535.1
535.20-535.21 1991 535.2
535.30-535.31 1991 535.3
535.40-535.41 1991 535.4
535.50-535.51 1991 535.5
535.60-535.61 1991 535.6
536.3 1994 536.8
537.82 1990 537.89
537.83 1991 537.82
556.0-556.6 1994 556
556.8-556.9 1994 556
562.02 1991 562.00
562.03 1991 562.01
562.12 1991 562.10
562.13 1991 562.11
569.60-569.61 1995 569.6
569.69 1995 569.6
569.84 1990 557.1
569.85 1991 569.84
593.70-593.73 1994 593.7
596.51-596.53 1992 596.5
596.54 1992 344.61
596.55-596.59 1992 596.5
599.81-599.89 1992 599.8
645.0 1991 645
651.30-651.31,651.33 1989 651.00-651.01,651.03
651.40-651.41,651.43 1989 651.10-651.11,651.13
651.50-651.51,651.53 1989 651.20-651.21,651.23
651.60-651.61,651.63 1989 651.80-651.81,651.83
654.20-654.21,654.23 1990 654.2,654.9
654.90-651.94 1990 654.2,654.9
657.0 1991 657
659.60,659.61,659.63 1992 659.80,659.81,659.83
665.10,665.11 1992 665.10,665.11,665.12,665.14
Note: The title for the subcategory, 665.1 has been changed, making the fifth-digit subclassification
         665.12 and 665.14 invalid.
670.0 1991 670
672.0 1991 672
677 1994 * No previous code assignments.
690.10 1995 690
690.11 1995 691.8 & 704.8
690.12 1995 691.8
690.18 1995 690
690.8 1995 690
692.72-692.74 1992 692.79
692.82-692.83 1992 692.89
702.0-702.8 1991 702
702.11,702.19 1994 702.1
704.02 1993 704.09
709.00-709.01,709.09 1994 709.0
710.5 1992 288.3,729.1
728.86 1995 729.4
733.10-733.16, 733.19 1993 733.1
738.10-738.19 1992 738.1
747.60-747.64, 747.69 1993 747.6
747.82 1993 747.89
753.10-753.17,753.19 1990 753.1
759.81-759.89 1989 759.8
759.83 1994 759.89
760.75 1991 760.79
760.76 1994 760.79
764.00-764.09 1988 764.0
764.10-764.19 1988 764.1
764.20-764.29 1988 764.2
764.90-764.99 1988 764.9
765.00-765.09 1988 765.0
765.10-765.19 1988 765.1
780.01-780.09 1992 780.0
780.03 1993 780.01
780.57 1992 780.51,780.53
781.8 1994 781.9
787.01-787.03 1994 787.0
787.91 1995 558.9
787.99 1995 787.9
788.20-788.21, 788.29 1993 788.2
788.30-788.39 1992 788.3
788.41-788.43 1993 788.4
788.61-788.62, 788.69 1993 788.6
789.00-789.07, 789.09 1994 789.0
789.30-789.37, 789.39 1994 789.3
789.40-789.47, 789.49 1994 789.4
789.60-789.67, 789.69 1994 789.6
790.91 1993 790.9
790.92 1993 286.9
790.93, 790.99 1993 790.9
795.71 1994 795.8 (delete code)
795.79 1994 795.7
795.8 1986 795.7
864.05 1992 864.09
864.15 1992 864.19
909.5 1994 909.9
925.1-925.2 1993 925
989.81-989.84 1995 989.8
989.89 1995 989.8
995.60-995.69 1993 995.0
996.04 1994 996.09
996.51-996.59 1987 996.5
996.60-996.69 1989 996.6
996.70-996.79 1989 996.7
996.80-996.89 1987 996.8
996.85 1990 999.8
997.00-997.01 1995 997.0
997.02 1995 997.9 & 430-434, 436
997.09 1995 997.0
997.91 1995 997.9
997.99 1995 997.9
998.81-998.82, 998.89 1994 998.8
V03.81-V03.82, V03.89 1994 V03.8
V05.3-V05.4 1993 V05.8
V06.5-V06.6 1994 V06.8
V07.31,V07.39 1994 V07.3
V07.4 1992 V07.8
V08 1994 044.9, 795.8 (delete code)
V09.0-V09.91 1993 * No previous code assignments for these codes.
V12.00-V12.03, V12.09 1994 V12.0
V12.50-V12.52 1995 V12.5
V12.59 1995 V12.5
V12.70-V12.72, V12.79 1994 V12.7
V13.00-V13.01, V13.09 1994 V13.0
V15.82 1994 305.13 (delete code)
V15.84-V15.86 1995 V15.89
V25.43 1992 V25.49
V25.5 1992 V25.8
V29.0-V29.8 1992 V71.8
V29.9 1992 V71.9
V30.00-V30.01 1989 V30.0
V31.00-V31.01 1989 V31.0
V32.00-V32.01 1989 V32.0
V33.00-V33.01 1989 V33.0
V34.00-V34.01 1989 V34.0
V35.00-V35.01 1989 V35.0
V36.00-V36.01 1989 V36.0
V37.00-V37.01 1989 V37.0
V39.00-V39.0l 1989 V39.0
V43.60-V43.66, V43.69 1994 V43.6
V43.81-V43.82 1995 V43.8
V43.89 1995 V43.8
V45.00 1994 V45.89
V45.01 1994 V45.0
V45.02, V45.09 1994 V45.89
V45.51 1994 V45.5
V45.52, V45.59 1994 V45.89
V45.82 1994 V45.89
V45.83 1995 V45.89
V49.60-V49.67 1994 V49.5
V49.70-V49.77 1994 V49.5
V50.41-V50.42, V50.49 1994 V50.8
V53.31 1994 V53.3
V53.32, V53.39 1994 V53.9
V56.1 1995 V58.89
V57.21-V57.22 1994 V57.2
V58.41, V58.49 1994 V58.4
V58.61 1995 V67.51
V58.69 1995 V67.51
V58.81, V58.89 1994 V58.8
V58.82 1995 V58.89
V59.01-V59.02 1995 V59.0
V59.09 1995 V59.0
V59.6 1995 V59.8
V65.40-V65.45, V65.49 1994 V65.4
V69.0-V69.3 1994 * No previous code assignments
V69.8-V69.9 1994 for these codes.
V72.81-V72.85 1993 V72.8
V73.88-V73.89 1993 V73.8
V73.98-V73.99 1993 V73.9
E854.8 1995 E858.8
E869.4 1994 E869.8
E880.1 1995 E884.9
E884.3-E884.4 1995 E884.2
E884.5-E884.6 1995 E884.9
E906.5 1995 E906.3
E908.0-E908.4 1995 E908
E908.8-E908.9 1995 E908
E909.0-E909.4 1995 E909
E909.8-E909.9 1995 E909
E920.5 1995 E920.4
E924.2 1995 E924.0
E968.5 1995 E968.8

 

PROCEDURE CODES
Effective
Current code(s) assignment October 1 Previous code(s) assignment
02.96 1992 89.19
03.90 1987 03.99 (Insertion of Catheter)
05.25 1995 39.7 (delete)
11.75 1989 11.79
11.76 1989 11.62
20.96-20.98 1986 20.95
22.12 1988 22.11
26.12 1988 26.11
29.31 1991 83.02
29.32 1991 29.3
29.33 1991 29.3
29.39 1991 29.3
31.45 1988 31.43-31.44
31.95 1989 31.75
32.01 1989 32.0
32.09 1989 32.0
32.22 1995 32.29, 32.9
32.28 1989 32.29
33.27 1987 33.22 + 33.27
33.28 1987 33.27
33.29 1987 33.28-33.29
33.50 1995 33.5
33.51 1995 33.5
33.52 1995 33.5
33.6 1990 33.5 + 37.5
34.05 1994 34.99
35.84 1988 35.82
35.96 1986 35.03
36.00-36.03 1986 36.0
36.04 1986 39.97
36.05 1987 36.01
36.05 1986 36.01 (Before October 1986 contents of

current code 36.05 would have been assigned to 36.0), 36.02

36.06 1995 36.01, 36.02, 36.03, 36.05
36.09 1986 36.0
36.09 1991 36.00 (Code Deleted)
37.26-37.27 1988 37.29
37.34 1988 37.33
37.65 1995 37.62
37.66 1995 37.62
37.70 (Leads Only) 1987 (Leads/Device) 37.7 0
37.71-37.72 (Leads Only) 1987 (Leads/Device) 37.74
37.73 (Leads Only) 1987 (Leads/Device) 37.73
37.74 (Leads Only) 1987 (Leads/Device) 37.76
37.75 (Leads Only) 1987 (Leads/Device) 37.89
37.76 (Leads Only) 1987 (Leads/Device) 37.81
37.77 (Leads Only) 1987 (Leads/Device) 37.83-37.84
37.78 1987 37.71-37.72
37.79 1987 86.09
37.80-37.87 1992 89.49 (Code deleted, this procedure is included in the code for pacemaker insertion/replacement)
37.80 (Device only) 1987 (Leads/Device) 37.73-37.77
37.81 (Device only) 1987 (Leads/Device) 37.73-37.77
37.82 (Device only) 1987 (Leads/Device) 37.73-37.77
37.83 (Device only) 1987 (Leads/Device) 37.73-37.77
37.85-37.87 1987 37.85
37.89 1987 37.86 + 37.89
37.94-37.98 1986 37.99
38.22 1986 38.29
38.44 (Abdominal Aorta Only) 1986 38.44 (Entire Aorta)
38.45 (Thoracic Aorta Added) 1986 38.44-38.45
38.95 1989 38.93
39.28 1991 39.29
39.50 1995 39.59
39.65 1988 39.61
39.66 1990 39.65
41.00-41.03 1988 41.0
41.04 1994 99.79
42.25 1988 42.24
42.33 1989 42.32, 42.39
42.33 1990 42.91
43.11 1989 43.1
43.19 1989 43.1, 43.2
43.41 1989 43.41,43.49
44.21 1986 44.2
44.22 1986 44.99
44.29 1986 44.2
44.43 1989 43.49,45.32
44.44 1989 38.86
44.49 1989 43.0
44.93-44.94 1986 44.99
45.16 1988 45.14 (45.15 before 1987)
45.30 1989 45.31,45.32
45.42 1988 45.41
45.43 1989 45.49
45.75 (Hartmann Resection Added) 1988 48.66 (Code Deleted)
45.95 1987 45.93
46.13 1992 46.12 (Code Deleted)
46.32 1989 46.39
46.85 1989 46.99
48.36 1995 45.42
49.31 1989 49.3
49.39 1989 49.3
51.10 1989 51.97
51.11 1989 51.11,51.97
51.14 1989 51.12
51.15 1989 51.97
51.22 1991 51.21 (Code Deleted),51.22
51.23 1991 51.22
51.64 1989 51.69
51.84-51.88 1989 51.97
51.97 1986 52.91,51.99, or 51.82
51.98 1986 51.99
52.13 1989 51.97,52.91
52.14 1989 52.11
52.21 1989 52.2
52.22 1989 52.2
52.93 1989 52.93 + 52.91
52.94 1989 52.09
52.97 1989 52.91
52.98 1989 52.91
52.99 1989 52.93,52.94,52.99
54.24 1987 54.23
54.25 1993 54.98
55.03-55.04 1986 55.02
56.33-56.34 1987 56.33
56.35 1987 45.12
57.17-57.18 1989 57.21
57.22 1989 57.22,57.82
58.31 1990 58.3
58.39 1990 58.3
58.93 1986 57.99
59.72 1995 59.79
59.96 1986 59.95
60.21 1995 60.2
60.29 1995 60.2
60.95 1991 60.99
64.97 1986 64.95
66.01 1992 66.0
66.02 1992 66.73
68.15 1987 68.14
68.16 1987 68.13
68.9 1992 68.4
74.3 1992 69.11 (Code Deleted)
77.56 1989 77.89,78.49,81.18
77.57 1989 77.89,80.48,81.18,83.85
77.58 1989 77.59,81.18
78.10 1991 78.40
78.11 1991 78.41
78.12 1991 78.42
78.13 1991 78.43
78.14 1991 78.44
78.15 1991 78.45
78.16 1991 78.46
78.17 1991 78.47
78.18 1991 78.48
78.19 1991 78.49
78.20 1991 78.10,78.20,78.30
78.21 1991 78.11,78.31
78.22 1991 78.12,78.22,78.32
78.23 1991 78.13,78.23,78.33
78.24 1991 78.14,78.34
78.25 1991 78.15,78.25,78.35
78.27 1991 78.17,78.27,78.37
78.28 1991 78.18,78.38
78.29 1991 78.11,78.16,78.19,78.29,78.39
78.39 1991 78.31
78.90 2/ 1987 78.40
78.91 2/ 1987 78.41
78.92 2/ 1987 78.42
78.93 2/ 1987 78.43
78.94 2/ 1987 78.44
78.95 2/ 1987 78.45
78.96 2/ 1987 78.46
78.97 2/ 1987 78.47
78.98 2/ 1987 78.48
78.99 2/ 1987 78.49
80.50-80.59 1986 80.5
81.03 1989 81.02
81.04-81.05 1989 81.03,81.04,81.05
81.06-81.07 1989 81.06,81.07
81.08 1989 81.06,81.07,81.08
81.09 1989 81.08
81.40 1989 81.69
81.51 1989 81.51,81.59
81.52 1989 81.61,81.62,81.63,81.64
81.53 1989 81.51,81.59,81.61,81.62,
81.63,81.64
81.54-81.55 1989 81.41
81.56 1989 81.48
81.57 1989 81.31,81.39
81.59 1989 81.39
81.72 1989 81.79
81.73-81.74 1989 81.86
81.75 1989 81.87
81.79 1989 81.79,81.87
81.80 1989 81.81
81.97 1992 81.59
85.95 1987 85.99
85.96 1987 85.99
86.06 1987 86.09
86.07 1990 86.09
86.27 1986 86.22-86.23
86.28 1988 86.22
86.93 1987 86.89
88.90 1986 88.39
88.91 1986 89.15
88.92 1986 89.39
88.93 1986 89.15
88.94 1986 89.39
88.95 1986 89.29
88.97 1989 88.99
88.98 1989 88.90
88.99 1986 89.39
89.10 1989 89.15
89.17-89.18 1988 89.15
89.19 1989 89.15
89.50 1991 89.54
92.3 1995 01.59, 04.07, 07.63, 07.68
93.90 1988 93.92
94.61-94.69 1989 94.25
96.6 1986 96.35
96.70 1991 93.92 (Code Deleted)
96.71 1991 93.92 (Code Deleted)
96.72 1991 93.92 (Code Deleted)
97.05 1989 51.97
98.51-98.52 1989 59.96 (Code Deleted)
98.59 1989 59.96 (Code Deleted)
99.00 1995 99.02
99.15 1986 99.29
99.28 1994 99.25
99.71-99.79 3/ 1988 99.07
99.85 1987 93.35
99.86 1987 93.39
99.88 1988 99.83

1/  Before October 1986 contents of current code 36.05 would have been assigned to 36.0.
2/  Codes 78.90-78.99 were retitled as "Insertion of bone growth stimulator" in October 1987; the previous contents
    of codes 78.90-78.99 were reassigned to codes 78.40-78.49.
3/ Codes 99.71-99.79 were deleted in October 1987; their contents were not transferred elsewhere.   In the October 1988
    revision, codes 99.71-99.79 were reclassified as "Therapeutic apheresis."


APPENDIX C
    Civilian Population* by Sex, Age, Geographic Region and Race
                   United States, July 1, 1996
        [Population estimates consistent with Series P-25,
      Current Population Reports, U.S. Bureau of the Census]


Age, geographic region, and race

Both sexes

Male

Female

Population in thousands
All ages

263,998

128,691

135,306

Northeast

51,520

24,867

26,653

Midwest

61,983

30,212

31,771

South

92,373

44,718

47,655

West

58,122

28,895

29,228

White

218,755

107,170

111,586

Black

33,257

15,707

17,550

All other

11,985

5,815

6,171

Under 15 years

57,708

29,549

28,159

Under 1 year

3,769

1,928

1,841

1-4 years

15,516

7,940

7,577

5-14 years

38,422

19,681

18,741

Northeast

10,606

5,433

5,173

Midwest

13,445

6,888

6,557

South

20,097

10,280

9,817

West

13,561

6,949

6,612

White

45,727

23,461

22,266

Black

8,946

4,539

4,408

All other

3,035

1,549

1,486

15-44 years

118,734

59,292

59,442

15-24 years

35,739

18,206

17,533

25-34 years

39,868

19,754

20,114

35-44 years

43,127

21,332

21,795

Northeast

22,835

11,362

11,473

Midwest

27,798

13,901

13,898

South

41,417

20,460

20,957

West

26,684

13,570

13,114

White

96,782

48,770

48,012

Black

15,981

7,613

8,368

All other

5,971

2,909

3,061

45-64 years

53,694

25,969

27,725

45-54 years

32,334

15,804

16,530

55-64 years

21,360

10,165

11,195

Northeast

10,763

5,150

5,613

Midwest

12,612

6,125

6,488

South

19,036

9,140

9,896

West

11,283

5,554

5,729

White

45,979

22,484

23,495

Black

5,564

2,479

3,085

All other

2,151

1,006

1,145

65 years & over

33,861

13,881

19,980

65-74 years

18,669

8,325

10,345

75-84 years

11,430

4,486

6,944

85 years and over

3,762

1,070

2,692

Northeast

7,316

2,922

4,394

Midwest

8,128

3,299

4,829

South

11,824

4,838

6,985

West

6,594

2,822

3,772

White

30,266

12,454

17,813

Black

2,766

1,077

1,689

All other

829

350

478

 *The NHDS used the civilian noninstitutional population to calculate hospital 
 utilization rates from 1965 through 1980.  Beginning in 1981, the civilian 
 resident population has been used to calculate rates.  If you have purchased 
 NHDS tapes for years before 1981 and calculated rates using the civilian 
 noninstitutionalized population provided in the documentation, these rates 
 will have to be adjusted to be comparable to 1996 rates using the civilian 
 resident population.
 Civilian Population of the United States, July 1, 1996.  Estimates by Age, Sex, 
 and Region.  Source: U.S. Bureau of the Census, consistent with Product 
 Announcement CB97-64, April 21, 1997 
United States Northeast Midwest South West
Total Male Female Total Male Female Total Male Female Total Male Female Total Male Female
Civilian Population in Thousands
ALL

263,998

128,691

135,306

51,520

24,867

26,653

61,983

30,212

31,771

92,373

44,718

47,655

58,122

28,895

29,228

0-4

19,286

9,868

9,418

3,514

1,799

1,715

4,344

2,222

2,121

6,716

3,434

3,282

4,712

2,412

2,300

5-9

19,441

9,954

9,487

3,649

1,871

1,778

4,499

2,305

2,194

6,728

3,440

3,289

4,564

2,339

2,226

10-14

18,981

9,727

9,254

3,443

1,763

1,680

4,602

2,360

2,242

6,653

3,406

3,246

4,284

2,198

2,086

15-19

18,573

9,545

9,028

3,299

1,690

1,609

4,555

2,340

2,215

6,602

3,378

3,224

4,116

2,137

1,979

20-24

17,167

8,662

8,505

3,122

1,574

1,548

4,048

2,041

2,007

6,160

3,056

3,104

3,836

1,989

1,846

25-29

18,733

9,302

9,432

3,691

1,831

1,860

4,266

2,112

2,154

6,510

3,187

3,323

4,267

2,171

2,095

30-34

21,135

10,453

10,682

4,215

2,082

2,133

4,800

2,374

2,426

7,299

3,567

3,732

4,820

2,429

2,392

35-39

22,395

11,096

11,299

4,447

2,200

2,248

5,245

2,612

2,633

7,689

3,763

3,926

5,014

2,521

2,493

40-44

20,732

10,235

10,497

4,061

1,985

2,075

4,883

2,420

2,463

7,157

3,508

3,648

4,632

2,322

2,310

45-49

18,406

9,033

9,373

3,655

1,770

1,885

4,307

2,117

2,190

6,418

3,137

3,280

4,027

2,009

2,017

50-54

13,928

6,771

7,157

2,812

1,351

1,461

3,236

1,576

1,660

4,923

2,379

2,545

2,956

1,465

1,491

55-59

11,361

5,454

5,907

2,276

1,083

1,192

2,695

1,299

1,396

4,063

1,933

2,130

2,328

1,139

1,189

60-64

9,999

4,711

5,288

2,019

945

1,074

2,375

1,133

1,242

3,632

1,691

1,941

1,973

941

1,032

65-69

9,892

4,507

5,384

2,091

939

1,152

2,317

1,061

1,256

3,544

1,605

1,938

1,939

901

1,038

70-74

8,778

3,818

4,960

1,875

799

1,076

2,067

903

1,163

3,094

1,338

1,756

1,742

776

965

75-79

6,873

2,821

4,052

1,508

602

906

1,641

662

980

2,376

973

1,402

1,347

583

763

80-84

4,557

1,666

2,892

1,002

355

647

1,132

406

725

1,553

562

990

872

343

529

85+

3,762

1,070

2,692

839

227

613

970

266

704

1,257

359

898

695

218

477

0-14

57,708

29,549

28,159

10,606

5,433

5,173

13,445

6,888

6,557

20,097

10,280

9,817

13,561

6,949

6,612

15-44

118,734

59,292

59,442

22,835

11,362

11,473

27,798

13,901

13,898

41,417

20,460

20,957

26,684

13,570

13,114

45-64

53,694

25,969

27,725

10,763

5,150

5,613

12,612

6,125

6,488

19,036

9,140

9,896

11,283

5,554

5,729

15+

206,290

99,142

107,147

40,914

19,434

21,479

48,538

23,324

25,214

72,277

34,438

37,839

44,561

21,946

22,615

45+

87,555

39,850

47,705

18,078

8,072

10,006

20,740

9,424

11,316

30,860

13,978

16,882

17,877

8,376

9,501

65+

33,861

13,881

19,980

7,316

2,922

4,394

8,128

3,299

4,829

11,824

4,838

6,985

6,594

2,822

3,772

75+

15,192

5,556

9,635

3,349

1,183

2,166

3,743

1,334

2,409

5,185

1,894

3,291

2,913

1,144

1,769

 

Civilian Population of the United States, July 1, 1996.    
Source: U.S. Bureau of the Census.  Population Division Release PPL#57.
 
All races White Black Other races
Age Total Male Female Total Male Female Total Male Female Total Male Female
Civilian population in thousands

All

263,998

128,691

135,306

218,755

107,170

111,586

33,257

15,707

17,550

11,985

5,815

6,171

0-4

19,286

9,868

9,418

15,289

7,839

7,450

2,948

1,494

1,454

1,048

534

514

0

3,769

1,928

1,841

3,015

1,546

1,469

546

277

270

208

106

102

1

3,785

1,934

1,850

3,013

1,544

1,469

566

286

280

206

105

101

2

3,828

1,961

1,868

3,028

1,554

1,474

591

300

291

209

107

103

3

3,885

1,990

1,894

3,065

1,574

1,491

609

309

300

210

107

103

4

4,019

2,054

1,964

3,168

1,622

1,546

636

322

314

215

110

105

5-9

19,441

9,954

9,487

15,361

7,879

7,482

3,093

1,569

1,524

988

507

481

5

4,046

2,072

1,974

3,193

1,638

1,555

638

324

315

215

110

105

6

4,020

2,058

1,962

3,186

1,634

1,552

633

322

312

201

103

98

7

3,876

1,984

1,892

3,052

1,565

1,487

630

319

311

194

100

94

8

3,645

1,865

1,780

2,881

1,476

1,404

578

293

285

186

95

91

9

3,853

1,975

1,878

3,050

1,565

1,484

612

311

301

191

98

93

10-14

18,981

9,727

9,254

15,077

7,744

7,334

2,905

1,475

1,430

998

508

490

10

3,862

1,982

1,880

3,070

1,579

1,492

595

302

292

196

101

96

11

3,798

1,946

1,853

3,027

1,554

1,474

578

293

285

193

99

95

12

3,688

1,887

1,800

2,922

1,499

1,423

567

288

280

199

101

98

13

3,803

1,947

1,856

3,020

1,550

1,471

575

292

283

208

105

102

14

3,830

1,965

1,865

3,038

1,562

1,475

591

300

290

202

103

99

15-19

18,573

9,545

9,028

14,768

7,617

7,150

2,888

1,463

1,425

917

465

452

15

3,789

1,948

1,841

3,000

1,546

1,453

588

299

288

202

102

99

16

3,822

1,973

1,849

3,032

1,569

1,463

600

307

293

190

97

93

17

3,727

1,930

1,797

2,959

1,537

1,422

583

298

285

185

94

90

18

3,546

1,819

1,728

2,835

1,461

1,374

546

275

272

165

83

82

19

3,688

1,875

1,813

2,942

1,504

1,438

570

283

287

176

88

88

19-24

17,167

8,662

8,505

13,700

6,961

6,739

2,523

1,227

1,296

944

473

471

20

3,492

1,773

1,719

2,793

1,426

1,367

523

258

265

176

89

87

21

3,458

1,752

1,706

2,761

1,406

1,355

512

252

260

184

93

91

22

3,287

1,659

1,628

2,624

1,333

1,290

479

233

246

184

92

92

23

3,329

1,674

1,655

2,646

1,342

1,305

491

237

255

191

96

96

24

3,601

1,805

1,796

2,876

1,454

1,422

517

247

270

208

103

105

25-29

18,733

9,302

9,432

15,130

7,589

7,542

2,546

1,201

1,345

1,057

512

545

25

3,825

1,905

1,920

3,070

1,542

1,528

534

254

281

221

110

112

26

3,801

1,886

1,915

3,072

1,538

1,534

512

242

270

217

106

111

27

3,720

1,849

1,871

3,018

1,515

1,502

490

231

259

212

102

110

28

3,472

1,720

1,752

2,813

1,409

1,404

468

220

249

191

91

100

29

3,915

1,941

1,974

3,158

1,584

1,574

542

254

288

215

103

112

30-34

21,135

10,453

10,682

17,306

8,657

8,649

2,763

1,282

1,481

1,066

514

552

30

3,934

1,944

1,990

3,185

1,592

1,593

539

251

288

209

100

109

31

4,078

2,014

2,064

3,325

1,662

1,664

542

252

290

211

101

110

32

4,249

2,099

2,149

3,484

1,741

1,743

550

254

295

215

104

111

33

4,312

2,126

2,186

3,552

1,771

1,781

547

252

294

213

103

111

34

4,562

2,269

2,293

3,759

1,891

1,868

585

272

313

218

106

112

35-39

22,395

11,096

11,299

18,559

9,297

9,262

2,796

1,299

1,497

1,040

500

540

35

4,542

2,251

2,292

3,755

1,881

1,874

568

263

304

220

106

113

36

4,478

2,218

2,260

3,711

1,859

1,852

560

259

301

208

100

108

37

4,464

2,208

2,256

3,695

1,848

1,846

562

260

302

208

100

108

38

4,220

2,086

2,135

3,515

1,756

1,759

514

238

276

191

91

100

39

4,690

2,334

2,355

3,883

1,953

1,930

593

278

315

213

103

110

40-44

20,732

10,235

10,497

17,319

8,648

8,671

2,465

1,141

1,324

947

446

501

40

4,379

2,165

2,214

3,633

1,816

1,817

540

250

289

206

98

108

41

4,244

2,096

2,148

3,534

1,766

1,768

512

236

276

198

94

104

42

4,119

2,031

2,088

3,448

1,719

1,729

486

225

261

185

88

98

43

3,963

1,946

2,017

3,311

1,646

1,666

460

212

249

191

89

102

44

4,028

1,997

2,030

3,394

1,702

1,692

467

218

250

166

78

89

45-49

18,406

9,033

9,373

15,618

7,753

7,865

1,993

909

1,084

795

371

424

45

3,770

1,856

1,914

3,161

1,575

1,585

438

201

237

171

80

91

46

3,634

1,786

1,848

3,060

1,523

1,537

412

188

224

162

75

87

47

3,594

1,757

1,836

3,022

1,496

1,526

407

185

222

165

77

88

48

3,408

1,665

1,743

2,920

1,443

1,478

345

156

189

142

66

76

49

4,001

1,969

2,032

3,455

1,717

1,738

391

179

212

155

73

82

50-54

13,928

6,771

7,157

11,947

5,868

6,079

1,413

633

780

568

270

298

50

2,828

1,379

1,449

2,404

1,185

1,219

293

132

161

131

63

69

51

2,787

1,358

1,429

2,380

1,172

1,208

288

130

159

119

56

63

52

2,769

1,345

1,424

2,383

1,170

1,213

276

124

153

109

52

58

53

2,936

1,426

1,510

2,552

1,252

1,300

279

125

154

105

50

55

54

2,607

1,262

1,345

2,228

1,090

1,138

276

123

153

103

49

54

55-59

11,361

5,454

5,907

9,762

4,738

5,025

1,163

510

653

436

207

229

55

2,407

1,159

1,248

2,052

998

1,054

256

114

142

98

47

51

56

2,346

1,127

1,218

2,012

979

1,033

244

106

138

89

42

47

57

2,327

1,116

1,210

1,998

969

1,029

241

106

135

88

42

46

58

2,135

1,022

1,112

1,849

895

954

208

91

117

77

36

41

59

2,148

1,029

1,119

1,850

896

954

214

94

121

83

39

44

60-64

9,999

4,711

5,288

8,652

4,125

4,526

995

427

568

352

158

194

60

2,078

980

1,098

1,792

854

937

209

90

119

77

36

41

61

2,061

978

1,083

1,792

861

930

198

85

114

71

33

39

62

1,921

907

1,014

1,656

791

865

195

84

110

70

32

39

63

1,942

916

1,025

1,684

804

879

191

82

109

67

30

37

64

1,997

929

1,068

1,729

815

914

202

86

116

67

29

38

65-69

9,892

4,507

5,384

8,667

3,985

4,683

929

398

532

295

125

170

65

2,044

944

1,100

1,771

828

944

207

88

119

66

28

37

66

2,017

933

1,084

1,761

822

940

194

85

109

61

26

35

67

1,978

905

1,073

1,732

801

931

188

79

108

58

24

34

68

1,944

879

1,066

1,715

781

934

173

74

99

56

23

32

69

1,909

847

1,062

1,687

753

934

167

71

96

54

23

32

70-74

8,778

3,818

4,960

7,844

3,434

4,410

704

285

419

229

99

131

70

1,839

811

1,028

1,624

722

902

163

67

96

52

22

30

71

1,827

800

1,027

1,633

720

913

147

60

87

48

21

27

72

1,780

780

1,000

1,597

705

892

135

54

81

48

21

27

73

1,664

715

949

1,491

644

847

130

52

78

43

18

25

74

1,668

711

956

1,499

643

856

129

51

78

39

17

22

75-79

6,873

2,821

4,052

6,198

2,556

3,642

526

202

324

149

62

86

75

1,603

679

924

1,442

615

827

124

49

75

37

15

21

76

1,442

603

839

1,300

546

754

110

44

66

32

13

19

77

1,347

552

795

1,215

501

715

102

39

63

29

12

17

78

1,282

512

770

1,161

467

694

96

35

61

26

11

15

79

1,198

474

724

1,079

428

652

94

35

59

25

11

14

80-84

4,557

1,666

2,892

4,150

1,520

2,631

320

109

211

87

37

50

80

1,081

415

665

984

380

604

75

26

49

21

9

12

81

1,003

376

627

914

344

571

70

24

46

19

8

11

82

904

329

575

824

301

524

63

21

42

17

7

10

83

838

295

544

763

268

494

60

20

40

16

7

9

84

731

251

481

664

227

438

53

18

35

14

6

8

85-89

2,394

739

1,655

2,182

669

1,513

170

52

118

42

17

25

85

617

202

415

563

184

379

43

14

29

11

5

7

86

544

173

371

495

156

339

39

12

27

10

4

6

87

475

146

329

434

132

302

33

10

23

8

3

5

88

413

121

292

376

109

267

30

9

21

7

3

4

89

346

97

248

314

88

226

26

7

18

6

2

4

90-94

1,024

261

763

923

231

692

82

22

60

19

7

12

90

291

78

213

264

70

193

22

6

16

5

2

3

91

253

65

187

227

58

169

21

6

15

5

2

3

92

202

50

151

182

45

137

16

4

12

4

1

2

93

159

38

121

143

34

109

13

4

10

3

1

2

94

119

28

91

107

25

83

9

2

7

2

1

2

95-99

286

60

226

254

51

202

27

7

20

6

2

4

95

102

23

79

90

19

70

10

3

8

2

1

1

96

72

15

56

63

13

50

7

2

5

2

1

1

97

50

10

40

45

9

36

4

1

3

1

0

1

98

36

7

29

32

6

26

3

1

2

1

0

1

99

27

5

22

24

4

19

2

1

2

1

0

0

100+

57

10

47

47

8

40

8

2

6

2

1

1

0-14

57,708

29,549

28,159

45,727

23,461

22,266

8,946

4,539

4,408

3,035

1,549

1,486

15-44

118,734

59,292

59,442

96,782

48,770

48,012

15,981

7,613

8,368

5,971

2,909

3,061

45-64

53,694

25,969

27,725

45,979

22,484

23,495

5,564

2,479

3,085

2,151

1,006

1,145

15+

206,290

99,142

107,147

173,028

83,708

89,320

24,311

11,168

13,143

8,951

4,266

4,685

45+

87,555

39,850

47,705

76,246

34,938

41,308

8,330

3,556

4,774

2,980

1,357

1,623

65+

33,861

13,881

19,980

30,266

12,454

17,813

2,766

1,077

1,689

829

350

478

75+

15,192

5,556

9,635

13,755

5,035

8,720

1,132

394

738

305

127

178

85+

3,762

1,070

2,692

3,406

959

2,447

286

83

203

69

27

42


APPENDIX D
BASIC DATA FOR NEWBORN INFANTS, Non-Medical Variables

UNWEIGHTED N

WEIGHTED ESTIMATE

SURVEY YEAR
96

31,706

3,925,871

UNITS FOR AGE
1 = Years

0

0

2 = Months

0

0

3 = Days

31,706

3,925,871

AGE
1 = Under 15

31,706

3,925,871

2 = 15-44

0

0

3 = 45-64

0

0

4 = 65 and Up

0

0

SEX
1 = Male

16,195

1,998,799

2 = Female

15,511

1,927,072

RACE
1 = White

16,633

2,251,570

2 = Black

4,223

502,456

3 = AmInd/Eskimo

135

19,784

4 = Asian/PacIsland

896

115,776

5 = Other

1,532

147,183

9 = Race Not Stated

8,287

889,102

MARITAL STATUS
1 = Married

1

369

2 = Single

10,988

2,554,106

3 = Widowed

0

0

4 = Divorced

0

0

5 = Separated

0

0

9 = Not Stated

20,717

1,371,396

DISCHARGE STATUS
1 = Routine/Home

30,340

3,701,550

2 = Left Ag Medical Advice

7

1,585

3 = Short Term Facility

366

57,244

4 = Long Term Care

32

2,598

5 = Alive, Not Stated

661

97,274

6 = Dead

116

13,133

9 = Status Not Stated

184

52,487

LENGTH OF STAY FLAG
0 = Less than 1 day

570

73,761

1 = 1 day or more

31,136

3,852,110

UNWEIGHTED N

WEIGHTED ESTIMATE

REGION
1 = NorthEast

5,974

645,439

2 = MidWest

9,238

825,932

3 = South

10,365

1,403,164

4 = West

6,129

1,051,336

BEDSIZE GROUP
1 = 6-99

3,244

714,697

2 = 100-199

6,317

1,019,273

3 = 200-299

6,751

653,068

4 = 300-499

10,707

1,103,553

5 = 500 and Up

4,687

435,280

HOSPITAL OWNERSHIP GROUP
1 = Proprietary

1,894

478,007

2 = Government

2,971

467,346

3 = Nonprofit

26,841

2,980,518

EXPECTED SOURCE OF PAYMENT, PRINCIPAL
0 = No Charge

99

14,204

1 = Workers Comp

8

686

2 = Medicare

63

13,302

3 = Medicaid

9,585

1,325,474

4 = Other Govt Pymt

314

67,798

5 = Blue Cross

3,119

345,013

6 = Other Priv/Comm

13,286

1,629,515

7 = Self-Pay

1,795

225,715

8 = Other

3,063

189,508

9 = Pymt Not Stated

374

114,656

ADMISSION MONTH
01 = January

2,334

298,785

02 = February

2,293

296,588

03 = March

2,464

322,570

04 = April

2,353

297,840

05 = May

2,464

320,197

06 = June

2,377

299,926

07 = July

2,419

321,316

08 = August

2,415

333,763

09 = September

2,315

307,838

10 = October

2,227

298,605

11 = November

1,993

268,221

12 = December

2,086

294,488

99 = Missing

3,966

265,734

 

BASIC DATA FOR NON-NEWBORNS, Non-Medical Variables

UNWEIGHTED N

WEIGHTED ESTIMATE

SURVEY YEAR
96

250,302

30,544,614

UNITS FOR AGE
1 = Years

242,438

29,808,419

2 = Months

5,473

500,960

3 = Days

2,391

235,235

AGE
1 = Under 15

23,880

2,206,856

2 = 15-44

85,034

10,325,208

3 = 45-64

50,988

6,294,238

4 = 65 and Up

90,400

11,718,312

SEX
1 = Male

99,772

12,109,749

2 = Female

150,530

18,434,865

RACE
1 = White

144,087

19,738,155

2 = Black

35,544

3,779,331

3 = AmInd/Eskimo

817

123,921

4 = Asian/PacIsland

3,478

488,751

5 = Other

9,642

738,556

9 = Race Not Stated

56,734

5,675,900

MARITAL STATUS
1 = Married

39,800

9,266,843

2 = Single

23,627

5,308,794

3 = Widowed

13,033

3,096,853

4 = Divorced

4,875

1,154,053

5 = Separated

981

185,149

9 = Not Stated

167,986

11,532,922

DISCHARGE STATUS
1 = Routine/Home

201,038

24,325,346

2 = Left Ag Medical Advice

2,102

233,885

3 = Short Term Facility

7,260

1,227,320

4 = Long Term Care

17,676

2,169,884

5 = Alive, Not Stated

13,993

1,411,150

6 = Dead

6,713

814,523

9 = Status Not Stated

1,520

362,506

LENGTH OF STAY FLAG
0 = Less than 1 day

5,689

812,199

1 = 1 day or more

244,613

29,732,415

UNWEIGHTED N

WEIGHTED ESTIMATE

REGION
1 = NorthEast

58,493

6,665,339

2 = MidWest

74,864

7,106,564

3 = South

83,710

11,085,190

4 = West

33,235

5,687,521

BEDSIZE GROUPING
1 = 6-99

28,457

5,957,110

2 = 100-199

48,312

7,639,989

3 = 200-299

49,943

5,533,746

4 = 300-499

88,460

7,927,924

5 = 500 and Up

35,130

3,485,845

HOSPITAL OWNERSHIP GROUP
1 = Proprietary

17,296

3,355,094

2 = Government

25,063

3,628,276

3 = Nonprofit

207,943

23,561,244

EXPECTED SOURCE OF PAYMENT, PRINCIPAL
0 = No Charge

569

94,080

1 = Workers Comp

1,809

224,344

2 = Medicare

89,834

11,647,252

3 = Medicaid

36,302

4,409,872

4 = Other Govt Pymt

2,588

459,807

5 = Blue Cross

19,981

2,267,748

6 = Other Priv/Comm

67,970

8,453,149

7 = Self-Pay

11,829

1,421,566

8 = Other

17,303

1,021,754

9 = Pymt Not Stated

2,117

545,042

ADMISSION MONTH
01 = January

19,217

2,536,400

02 = February

18,471

2,398,878

03 = March

18,941

2,491,541

04 = April

18,380

2,420,737

05 = May

18,426

2,414,590

06 = June

17,452

2,285,677

07 = July

17,594

2,336,233

08 = August

16,979

2,264,541

09 = September

16,417

2,225,512

10 = October

16,878

2,303,351

11 = November

15,973

2,107,026

12 = December

17,472

2,306,970

99 = Missing

38,102

2,453,158

FIRST-LISTED DIAGNOSES FOR NEWBORN INFANTS, by ICD9-CM Chapter

UNWEIGHTED N

WEIGHTED ESTIMATE

VCODES

31,706

3,925,871

CHAPTER 1

0

0

CHAPTER 2

0

0

CHAPTER 3

0

0

CHAPTER 4

0

0

CHAPTER 5

0

0

CHAPTER 6

0

0

CHAPTER 7

0

0

CHAPTER 8

0

0

CHAPTER 9

0

0

CHAPTER 10

0

0

CHAPTER 11

0

0

CHAPTER 12

0

0

CHAPTER 13

0

0

CHAPTER 14

0

0

CHAPTER 15

0

0

CHAPTER 16

0

0

CHAPTER 17

0

0

FIRST-LISTED DIAGNOSES FOR NON-NEWBORNS, by ICD9-CM Chapter

UNWEIGHTED N

WEIGHTED ESTIMATE

VCODES

37,490

4,245,991

CHAPTER 1

7,386

845,293

CHAPTER 2

14,791

1,804,767

CHAPTER 3

10,163

1,272,426

CHAPTER 4

3,099

333,479

CHAPTER 5

16,211

1,942,533

CHAPTER 6

4,307

512,456

CHAPTER 7

48,112

6,107,307

CHAPTER 8

25,949

3,237,891

CHAPTER 9

23,090

2,906,030

CHAPTER 10

13,261

1,672,588

CHAPTER 11

4,677

535,681

CHAPTER 12

3,766

451,556

CHAPTER 13

11,751

1,505,708

CHAPTER 14

1,953

166,770

CHAPTER 15

1,542

152,320

CHAPTER 16

2,250

302,190

CHAPTER 17

20,504

2,549,628

 

WEIGHTED FREQUENCIES - ALL-LISTED DIAGNOSES, by ICD9-CM Chapter

NEWBORN INFANTS

NON-NEWBORNS

ALL

7,511,702

125,078,947

ECODES

2,439

3,367,282

VCODES

4,695,900

8,371,966

CHAPTER 1

50,176

3,527,457

CHAPTER 2

13,307

4,488,142

CHAPTER 3

16,839

12,022,958

CHAPTER 4

6,421

3,920,735

CHAPTER 5

549

7,350,789

CHAPTER 6

16,396

3,455,621

CHAPTER 7

17,497

26,992,311

CHAPTER 8

17,549

9,368,172

CHAPTER 9

23,388

8,156,083

CHAPTER 10

25,500

6,811,524

CHAPTER 11

0

8,264,816

CHAPTER 12

21,425

1,531,063

CHAPTER 13

11,038

4,540,849

CHAPTER 14

252,180

576,600

CHAPTER 15

2,271,852

415,824

CHAPTER 16

61,935

5,997,787

CHAPTER 17

7,311

5,918,968

WEIGHTED FREQUENCIES - ALL-LISTED PROCEDURES, by ICD9-CM Chapter

NEWBORN INFANTS

NON-NEWBORNS

ALL

2,538,483

40,397,052

CHAPTER 1

56,918

937,246

CHAPTER 2

0

100,674

CHAPTER 3

552

188,200

CHAPTER 4

1,144

58,201

CHAPTER 5

1,835

323,448

CHAPTER 6

15,763

1,038,474

CHAPTER 7

112,923

5,443,642

CHAPTER 8

107

347,776

CHAPTER 9

11,370

4,976,411

CHAPTER 10

1,723

1,016,417

CHAPTER 11

1,204,539

301,734

CHAPTER 12

45

2,095,890

CHAPTER 13

0

6,540,185

CHAPTER 14

510

3,134,126

CHAPTER 15

7,064

1,290,163

CHAPTER 16

1,123,990

12,604,465




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