NAMCS and NHAMCS: U.S. Ambulatory Health Care Survey Data

The National Ambulatory Medical Care Survey (NAMCS) and National Hospital Ambulatory Medical Care Survey (NHAMCS) are conducted by the Centers for Disease Control and Prevention. The data includes information on patient visits to physician offices, hospital outpatient departments, and emergency departments, covering patient demographics, conditions, and services provided. NAMCS data is available from 1973-1981, 1985, and annually since 1989, while NHAMCS data is available annually since 1992, with the most recent data from 2008 at the time of the description.

Use Cases

• Analyzing trends in patient demographics and visit characteristics based on survey data.
• Studying the prevalence of specific conditions and diagnostic services used in ambulatory settings.
• Comparing healthcare service patterns between physician offices, outpatient departments, and emergency departments.

Strengths

• Data is collected by a major public health institution, the Centers for Disease Control and Prevention.
• Surveys have a long temporal coverage, with NAMCS starting in 1973 and NHAMCS in 1992.
• Data covers multiple care settings: physician offices, hospital outpatient, and emergency departments.

Limitations

• The description notes the most recent data was from 2008, indicating the dataset may not be current.
• Row count, file formats, and column-level documentation are unknown, limiting suitability assessment.
• Data may reflect geographic and temporal biases inherent to the U.S. survey methodology.

Provenance

Source

Centers for Disease Control and Prevention (CDC)

Collection Method

Annual surveys: National Ambulatory Medical Care Survey (NAMCS) and National Hospital Ambulatory Medical Care Survey (NHAMCS).

Time Range

NAMCS: 1973-1981, 1985, annually since 1989. NHAMCS: annually since 1992. Most recent data noted as 2008.

Geography

United States (implied by the CDC's role)