Hospital Health Care Data
The National Hospital Ambulatory Medical Care Survey (NHAMCS) is designed to collect data on the utilization and provision of ambulatory care services in hospital emergency and outpatient departments and ambulatory surgery locations. Findings are based on a national sample of visits to the emergency departments, outpatient departments, and ambulatory surgery locations of noninstitutional general and short-stay hospitals.
The National Health Care Surveys (including NAMCS, NHAMCS, and NHCS) are working with the Centers for Medicare and Medicaid Services Electronic Health Record Incentive Programs: Promoting Interoperability (PI) (formerly known as Meaningful Use (MU)) and the Merit-based Incentive Payment System (MIPS). Click here to find out more.
Data Products
- 2022 Data Available on Emergency Department Visits (8/14/2024)
- 2022 NHAMCS Emergency Department Public Use File (7/19/2024)
- 2021 NHAMCS Emergency Department Summary Tables [PDF – 831 KB]
NOTE: Table 1 of this document was revised on October 11, 2023, to correct visit estimates for nursing home and homeless patients and update footnotes 2 and 3. (10/13/2023) - 2021 NHAMCS Emergency Department Public Use File (7/10/2023)
Publications
- Emergency Department Visits by Adults Age 65 and Older With Alzheimer Disease: United States, 2020–2022 (10/29/2024)
- Visits to Health Centers Among Adults, by Selected Characteristics: United States, 2022 [PDF – 412 KB] (10/22/2024)
- Emergency Department Visit Rates by Selected Characteristics: United States, 2022 (8/15/2024)
- Emergency Department Visits by Homeless Status and Sex: United States, 2016–2021 [PDF – 702 KB] (6/11/2024)
- Trends in Emergency Department Visits Among People Younger Than Age 65 by Insurance Status: United States, 2010–2021 [PDF – 508 KB] (1/18/2024)
- Emergency Department Visit Rates by Adults With Diabetes: United States, 2020–2021 (12/19/2023)
- Emergency Department Visit Rates for Assault: United States, 2019–2021 (10/12/2023)
- Emergency Department Visit Rates by Selected Characteristics: United States, 2021 (8/24/2023)