title: National Hospital Ambulatory Medical Care Survey: 2000 outpatient department summary.
abstract: OBJECTIVE
  This report describes ambulatory care visits to hospital outpatient departments (OPDs) in the United States. Statistics are presented on selected hospital, clinic, patient, and visit characteristics. Highlights of trends in OPD utilization from 1997 through 2000 are also presented.
  
  
  METHODS
  The data presented in this report were collected from the 2000 National Hospital Ambulatory Medical Care Survey (NHAMCS). NHAMCS is part of the ambulatory care component of the National Health Care Survey that measures health care utilization across various types of providers. NHAMCS is a national probability sample survey of visits to emergency and outpatient departments of non-Federal, short-stay, and general hospitals in the United States. Sample data are weighted to produce annual national estimates. Trends are based on NHAMCS data from 1997 through 2000.
  
  
  RESULTS
  During 2000, an estimated 83.3 million visits were made to hospital OPDs in the United States, about 30.4 visits per 100 persons. Females had higher OPD visit rates than males (35.3 versus 25.2 visits per 100 persons). The OPD utilization rate for black persons was higher than for white persons (48.3 versus 28.0 visits per 100 persons). Of all visits made to hospital OPDs in 2000, private insurance (38.5 percent), Medicaid (22.1 percent), and Medicare (16.9 percent) were listed as the leading primary expected source of payment. Approximately 21 percent of OPD visits reported that patients belonged to an HMO. There were an estimated 9.5 million injury-related OPD visits in 2000. Since 1997, the percent of OPD visits that were for injuries increased by 24% (from 9.2 percent to 1.4 percent). Most of these visits were for unintentional injuries (57.6 percent), including those caused by falls (12.9 percent). Medications were prescribed at 64.0 percent of visits. On average, 1.6 medications were ordered at each OPD visit. In 2000, patients saw one or more physicians (i.e., staff physician, resident/intern, or other physician) at approximately 79 percent of visits. Most patients were given an appointment to return to the clinic (57.2 percent).
authors.affiliation: Division of Health Care Statistics, Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics, Hyattsville, Maryland 20782-2003, USA.
authors.forename: Nghi
authors.initials: N
authors.lastname: Ly
authors.forename: Linda F
authors.initials: LF
authors.lastname: McCaig
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D011307:Drug Prescriptions / Q000706:statistics & numerical data; D005260:Female; D019538:Health Care Surveys; D006302:Health Services Research; D006761:Hospitals / Q000145:classification / Q000706:statistics & numerical data; D006801:Humans; D038801:International Classification of Diseases; D008297:Male; D008875:Middle Aged; D009819:Office Visits / Q000706:statistics & numerical data / Q000639:trends; D010044:Outpatient Clinics, Hospital / Q000145:classification / Q000706:statistics & numerical data*; D010045:Outpatients / Q000145:classification; D014481:United States