National Hospital Ambulatory Medical Care Survey (NHAMCS)

Topic/Focus: Healthcare Facilities and Services

Year(s): 1992 – 2011 (1999-2011 available on AWS)

Source: National Center for Health Statistics

Study and sample characteristics: Patient records

Universe: Visits to the emergency departments and outpatient departments of non-institutional general and short-stay hospitals, exclusive of Federal, military, and Veterans Administration hospitals

Variables: Varies by year

Access: Publicly available

Cost: Free

Key weblinks: Ambulatory Health Care Data

Summary: The NHAMCS covers the areas of ambulatory care not included in the National Ambulatory Medical Care Survey: visits to hospital emergency departments and outpatient departments. The NHAMCS is organized into an emergency department file and an outpatient file and includes data items on demographics, hospital information, diagnoses, procedures, injury status, medications, and diagnostic services.