National Hospital Ambulatory Medical Care Survey
Alternate Titles(s): NHAMCS
- Description
The National Hospital Ambulatory Medical Care Survey (NHAMCS) is a national survey that collects information information about the provision and use of ambulatory medical care services in the United States. The survey samples visits to hospital outpatient departments (OPD), hospital emergency departments (ED), and hospital-based ambulatory surgery locations (ASL). The survey has been conducted annually since 1992; since 2018, the survey has only collected data on hospital emergency department visits.
Approximately 500 nationally representative hospitals are selected to provide data on a sample of patient visits each year. Excluded hospitals include federal, hospital units within institutions, and hospitals with fewer than six staffed beds for patient use. Data collected includes patient demographics, conditions treated, services provided, and payment methods. The data is weighted to produce national estimates.
- Publisher
- Timeframe
- 1992 - Present
- Geographic Coverage
-
United States
Access
- Restrictions
-
Free to AllFee RequiredApplication Required
- Instructions
- Public-use data files are available for download from the NAMCS website through the access link. Read-in files are available for SAS, Stata, and SPSS. Public-use files for all survey years have also been shared through the ICPSR data repository. Access to restricted data is available for a fee to approved users at the NCHS Research Data Centers. To review the documentation for restricted data, refer to this page before submitting an application.
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