National Hospital Discharge Survey, 2004 United States Department of Health and Human Services. National Center for Health Statistics health care facilities hospitalization hospitals illness medical care medical evaluation medical procedures medical records patients NACDA.VI ICPSR.IX RCMD.V The 2004 National Hospital Discharge Survey (NHDS) collects medical and demographic information annually from a sample of hospital discharge records. Variables include patients' demographic characteristics (sex, age, race, marital status), dates of admission and discharge, source and type of admission, status at discharge, final diagnoses, surgical and nonsurgical procedures, dates of surgeries, and sources of payment. Information on hospital characteristics such as bedsize, ownership, and region of the country is also included. The medical information is coded using the INTERNATIONAL CLASSIFICATION OF DISEASES, 9TH REVISION, CLINICAL MODIFICATION (ICD-9-CM). 2006-05-03 administrative records data 4442 10.3886/ICPSR04442.v1 hospital records United States 2004 ICPSR metadata records are licensed under a Creative Commons Attribution-Noncommercial 3.0 United States License (http://creativecommons.org/licenses/by-nc/3.0/us/).