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National Hospital Ambulatory Medical Care Survey, 1996

Resource Type
Dataset : survey data
  • United States Department of Health and Human Services. National Center for Health Statistics
Other Title
  • Version 1 (Subtitle)
Collective Title
  • National Hospital Ambulatory Medical Care Survey Series
Publication Date
Free Keywords
ambulatory care; health care services; hospitalization; hospitals; emergency services; injuries; medical care; medical evaluation; medical procedures; medical records; patient care; patients; payment methods; surgery; treatment
  • Abstract

    The National Hospital Ambulatory Medical Care Survey (NHAMCS) was inaugurated in 1992 to fill a gap in data about ambulatory medical care in the United States. Although the National Ambulatory Medical Care Survey (NAMCS) collects annual data on patient visits to physician offices, it excludes the hospital emergency room and outpatient department visits that make up a large part of the total ambulatory care received each year. The NHAMCS provides data from samples of patient records selected from emergency departments (EDs) and outpatient departments (OPDs) of a national sample of hospitals. The resulting national estimates describe the use of hospital ambulatory medical care services in the United States. For the 1996 survey, data were collected from 235 OPDs and 392 EDs. Among the variables included are age, race, and sex of the patient, reason for the visit, physician's diagnoses, cause of injury (ED only), surgical procedures (OPD only), medication therapy, and expected source of payment.
  • Table of Contents


    • DS0: Study-Level Files
    • DS1: Emergency Department Data
    • DS2: Outpatient Department Data
Geographic Coverage
  • United States
Collection Mode
  • (1) This collection has not been processed by ICPSR staff. ICPSR is distributing the data and documentation for this collection in essentially the same form in which they were received. When appropriate, hardcopy documentation has been converted to machine-readable form and variables have been recoded to ensure respondents' anonymity. (2) Per agreement with NCHS, ICPSR distributes the data file(s) and technical documentation in this collection in their original form as prepared by NCHS.

2006-01-18 File CB2365.ALL was removed from any previous datasets and flagged as a study-level file, so that it will accompany all downloads.
This study is freely available to the general public via web download.
Alternative Identifiers
  • 2365 (Type: ICPSR Study Number)
  • Chirdkiatgumchai, Vilawan, Xiao, Hong, Fredstrom, Bridget K., Adams, Ryan E., Epstein, Jeff N., Shah, Samir S., Brinkman, William B., Kahn, Robert S., Froehlich, Tanya E.. National trends in psychotropic medication use in young children: 1994-2009. Pediatrics.132, (4), 615-623.2013.
    • ID: 10.1542/peds.2013-1546 (DOI)
  • Gupta, M.A., Gupta, A.K., Fink, N.H.. Polypharmacy in dermatology: Analysis of a nationally representative sample of 46,273 dermatology patient visits in the United States from 1995-2009. Skinmed.11, (5), 273-280.2013.
  • Haggins, Adrianne, Patrick, Stephen, Demonner, Sonya, Davis, Matthew M.. When coverage expands: Children's Health Insurance Program as a natural experiment in use of health care services. Academic Emergency Medicine.20, (10), 1026-1032.2013.
    • ID: 10.1111/acem.12236 (DOI)
  • Koelblinger, P. Dabade, T.S., Gustafson, C.J., Davis, S.A., Yentzer, B.A., Kiracofe, E.A., Feldman, S.R.. Skin manifestations of outpatient adverse drug events in the United States: A national analysis. Journal of Cutaneous Medicine and Surgery.17, (4), 269-275.2013.
  • Ladapo, Joseph A.. Physician decision-making and trends in use of cardiac stress testing to diagnose coronary heart disease in the United States. 35th Annual Meeting of the Society for Medical Decision Making.Baltimore, MD. 2013.
  • Manseau, Marc, Case, Brady G.. Racial-ethnic disparities in outpatient mental health visits to US physicians, 1993-2008. Psychiatric Services.2013.
    • ID: 10.1176/ (DOI)
  • Barnett, Michael L., Song, Zirui, Landon, Bruce E.. Trends in physician referrals in the united states, 1999-2009. Archives of Internal Medicine.172, (2), 163-170.2012.
    • ID: 10.1001/archinternmed.2011.722 (DOI)
  • Wisniewski, Angela M., Purdy, Christopher H., Blondell, Richard D.. The epidemiologic association between opioid prescribing, non-medical use, and emergency department visits. Journal of Addictive Diseases.27, (1), 1-11.2008.
    • ID: 10.1300/J069v27n01_01 (DOI)
  • Cunningham, Peter, May, Jessica. Insured Americans Drive Surge in Emergency Department Visits. Issue Brief: Findings from HSC.70, Washington, DC: Center for Studying Health System Change. 2003.
    • ID: (URL)
  • Guerrero, J.L., Thurman, D.J., Sniezek, J.E.. Emergency department visits associated with traumatic brain injury: United States, 1995-1996. Brain Injury.14, (2), 181-186.2000.
  • Mort, Jane R., Aparasu, Rajender R.. Prescribing potentially inappropriate psychotropic medications to the ambulatory elderly. Archives of Internal Medicine.160, (18), 2825-2831.2000.
    • ID: 10.1001/archinte.160.18.2825 (DOI)
  • Powell, E.C., Tanz, R.R.. Cycling injuries treated in emergency departments: need for bicycle helmets among preschoolers. Archives of Pediatrics and Adolescent Medicine.154, (11), 1096-1100.2000.
  • Stone, S., Gonzales, R., Maselli, J., Lowenstein, S.R.. Antibiotic prescribing for patients with colds, upper respiratory tract infections, and bronchitis: A national study of hospital-based emergency departments. Annals of Emergency Medicine.36, (4), 320-327.2000.
    • ID: 10.1067/mem.2000.109341 (DOI)
  • Burt, C.W.. Summary statistics for acute cardiac ischemia and chest pain visits to United States EDs, 1995-1996. American Journal of Emergency Medicine.17, (6), 552-559.1999.
  • Liu, T., Sayre, M.R., Carleton, S.C.. Emergency medical care: types, trends, and factors related to nonurgent visits. Academic Emergency Medicine.6, (11), 1147-1152.1999.
    • ID: 10.1111/j.1553-2712.1999.tb00118.x (DOI)
  • McCaig, L.F., Burt, C.W.. Poisoning-related visits to emergency departments in the United States, 1993-1996. Journal of Toxicology. Clinical Toxicology.37, (7), 817-826.1999.
    • ID: 10.1081/CLT-100102460 (DOI)
  • Rovi, S., Johnson, M.S.. Physician use of diagnostic codes for child and adult abuse. Journal of the American Medical Women's Association.54, (4), 211-214.1999.
  • McCaig, L.F., Burt, C.W., Stussman, B.J.. A comparison of work-related injury visits and other injury visits to emergency departments in the United States, 1995-1996. Journal of Occupational and Environmental Medicine.40, (10), 870-875.1998.
    • ID: 10.1097/00043764-199810000-00006 (DOI)
  • Schappert, Susan M.. Ambulatory care visits to physician offices, hospital outpatient departments, and emergency departments: United States, 1996. Vital and Health Statistics, Series 13: Data From the National Health Survey.134, Hyattsville, MD: National Center for Health Statistics. 1998.
    • ID: (URL)
  • McCaig, Linda F.. National Hospital Ambulatory Medical Care Survey: 1996 outpatient department summary. Advance Data from Vital and Health Statistics.294, Hyattsville, MD: National Center for Health Statistics. 1997.
    • ID: (URL)
  • McCaig, Linda F., Stussman, Barbara J.. National Hospital Ambulatory Medical Care Survey: 1996 emergency department summary. Advance Data from Vital and Health Statistics.293, Hyattsville, MD: National Center for Health Statistics. 1997.
    • ID: (URL)

Update Metadata: 2015-08-05 | Issue Number: 6 | Registration Date: 2015-06-15

United States Department of Health and Human Services. National Center for Health Statistics (1998): National Hospital Ambulatory Medical Care Survey, 1996. Version 1. National Hospital Ambulatory Medical Care Survey Series. Version: v1. ICPSR - Interuniversity Consortium for Political and Social Research. Dataset.