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Scientific Data Documentation
National Hospital Discharge Survey, 1996
DSN: CC36.NHDS96AbstractThis 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 SURVEYINTRODUCTION.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 METHODOLOGYSOURCE 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 SurveyFollowing 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 ESTIMATESParameters 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% = 20,800The 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 <-> 457,600Relative Standard Error for Estimates of PercentsApproximate 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% = .0017The 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 <-> .6074or, 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 DiagnosisNumber of
All-Listed DiagnosesNumber of
Days of CareNumber of
All-Listed ProceduresCharacteristic
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.REFERENCES1. 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 TAPEData 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----------------------------------------------282,008III. RECORD FORMAT: Location and Coding of Data ElementsThis 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 Codes1 1-2 2 Survey Year: 962 3 1 Newborn Status: 1 = Newborn 2 = Not Newborn3 4 1 Units for Age: 1 = Years 2 = Months 3 = Days4 5-6 2 Age in years, months, or days: If Units = Years: 0-99* If Units = Months:01-11 If Units = Days: 00-315 7 1 Sex: 1 = Male 2 = Female6 8 1 Race: 1 = White 2 = Black 3 = American Indian/Eskimo 4 = Asian/Pacific Islander 5 = Other 9 = Not Stated7 9 1 Marital Status: 1 = Married 2 = Single 3 = Widowed 4 = Divorced 5 = Separated 9 = Not Stated8 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 Codes9 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 Reported10 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 more12 18 1 Geographic Region: 1 = Northeast 2 = Midwest 3 = South 4 = West13 19 1 Number of Beds, Recode: 1 = 6-99 2 = 100-199 3 = 200-299 4 = 300-499 5 = 500 and over14 20 1 Hospital Ownership: 1 = Proprietary 2 = Government 3 = Nonprofit, including ChurchItem Tape Number of Number Location Positions Item Description and Codes15 21-25 5 Analysis Weight: Use to obtain weighted estimates16 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 Stated17 27 1 Secondary Expected Source of Payment: Same coding as item 1618 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 ADEFINITION OF TERMSTerms relating to hospitals and hospitalizationHospitals: 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 proceduresDischarge 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 dischargesProcedure: 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 termsAge: 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
NORTHEAST MIDWEST SOUTH WEST Maine Michigan Delaware Montana New Hampshire Ohio Maryland Idaho Vermont Illinois District of Columbia Wyoming Massachusetts Indiana Virginia Colorado Connecticut Wisconsin West Virginia New Mexico Rhode Island Minnesota North Carolina Arizona New York Iowa South Carolina Utah New Jersey Missouri Georgia Nevada Pennsylvania North Dakota Florida Washingtion South Dakota Kentucky Oregon Nebraska Tennessee California Kansas Alabama Hawaii Mississippi Alaska Arkansas Louisiana Oklahoma APPENDIX BThe 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
1/ Before October 1986 contents of current code 36.05 would have been assigned to 36.0.
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
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 CCivilian 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
