Estimates of Emergency Department Visits in the United States, 2016-2019

The National Hospital Ambulatory Medical Care Survey (NHAMCS), conducted by the National Center for Health Statistics (NCHS), collects annual data on visits to emergency departments to describe patterns of utilization and provision of ambulatory care delivery in the United States. Data are collected from nonfederal, general, and short-stay hospitals from all 50 U.S. states and the District of Columbia, and are used to develop nationally representative estimates.

This visualization depicts both counts and rates of emergency department visits from 2016-2019 for the 10 leading primary diagnoses and reasons for visit, stratified by selected patient and hospital characteristics. Rankings for the 10 leading categories were identified using weighted data from 2019 and were then assessed in prior years; however, rankings were relatively consistent over the evaluated years. Estimates in this visualization highlight and expand on information provided in the annual NHAMCS web tables, which can be used to assess how these categories and rankings changed over the evaluated years.

Use the tabs at the bottom of the visualization to select between “Primary Diagnosis” and “Reason for Visit”.  Use the drop-down menus at the top of the visualization to select the estimate type, the estimate category, and the group breakdown of interest.


Data Source

National Center for Health Statistics, National Hospital Ambulatory Medical Care Survey, 2016-2019

Suggested Citation

National Center for Health Statistics. Emergency Department Visits in the United States, 2016-2019. Generated interactively: from

Page last reviewed: May 18, 2022