What’s New

Data Products

• 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)
• National estimates of office-based physician characteristics and practice characteristics by physician type [PDF – 118 KB] (8/2023)
• The 2021 NHAMCS Emergency Department public use data file and documentation are now available for downloading, along with SAS, Stata, and SPSS files for reading and formatting the data. In addition to the SAS, Stata, and SPSS code which can be used with the ASCII data file to create data sets, we also provide pre-made SAS, Stata, and SPSS datasets. A drug ingredient file and program to add drug ingredients to the ASCII file is also available. (7/2023)
• 2019 NAMCS Summary Tables [PDF – 864 KB] (1/2023)
• 2020 NHAMCS Emergency Department Summary Tables [PDF – 1 MB] (12/2022)
• Estimates of Emergency Department Visits in the United States, 2016-2020 (12/2022)
• The 2019 NAMCS public use data file and documentation are now available for downloading. In addition to the SAS, Stata, and SPSS code which can be used with the ASCII data file to create data sets, we have also provided pre-made datasets for user convenience. A drug ingredient file and program for adding drug ingredients is also available.
  NOTE: This release constitutes the last year of NAMCS office-based physician visit data for several years; visit data from office-based physicians are planned to be collected again, sometime after 2023, by leveraging electronic health records and other electronic health data sources. Please see this important update for more information. (11/2022)
• An addendum to the 2018 NAMCS public use data file documentation is now available, along with a SAS data set containing a refined version of the patient visit weight and the physician weight. The addendum includes a program to merge the new variables to the existing 2018 NAMCS public use data file. The refined weighting variables reflect changes made to the weighting methodology used with the 2019 NAMCS. They are being provided should researchers wish to use the same methodology for both survey years. See the addendum for more information. (11/2022)
• The 2020 NHAMCS Emergency Department public use data file and documentation are now available for downloading, along with SAS, Stata, and SPSS files for reading and formatting the data.  In addition to the SAS, Stata, and SPSS code which can be used with the ASCII data file to create data sets, we also provide pre-made SAS, Stata, and SPSS datasets. A drug ingredient file and program to add drug ingredients to the ASCII file is also available. (8/2022)
• 2019 NHAMCS – Emergency Department Summary Tables [PDF – 761 KB]
  NOTE: Tables 2, 5, 7, 12, 21, and 27 of this document were updated on July 29, 2022 to correct formatting and numerical errors for some estimates. Tables downloaded prior to this date should be replaced. (8/5/2022)

Publications

• 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)
• Sampling Procedures for the Collection of Electronic Health Record Data From Federally Qualified Health Centers, 2021–2022 National Ambulatory Medical Care Survey (6/26/2023)
• Emergency Department Visits Among Children Aged 0–17 by Selected Characteristics: United States, 2019–2020 (6/6/2023)
• Emergency Department Visit Rates for Motor Vehicle Crashes by Selected Characteristics: United States, 2019–2020 (4/21/2023)
• Characteristics of Office-based Physician Visits by Age, 2019 (4/19/2023)
• Emergency Department Visits with Suicidal Ideation: United States, 2016–2020 (4/13/2023)
• Opioids Prescribed to Adults at Discharge From Emergency Departments: United States, 2017–2020 (1/20/2023)
• Emergency Department Visit Rates by Selected Characteristics: United States, 2020 (11/2022)
• Experiences Related to the COVID-19 Pandemic Among U.S. Physicians in Office-based Settings, 2020–2021 [PDF – 305 KB] (9/2022)
• Emergency Department Visits by Adults With Chronic Conditions Associated With Severe COVID-19 Illness: United States, 2017–2019 [PDF – 1,013 KB] (9/2022)
• Characteristics of Visits to Health Centers: United States, 2020 (6/2022)