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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)
2020 NAMCS Community Health Center summary tables [PDF – 287 KB] (6/2022)
A visit-level file based on 2020 NAMCS Community Health Center data is available for use in the NCHS Research Data Center (RDC). Please see the RDC file data dictionary [PDF – 684 KB], visit the RDC website, or contact the Ambulatory and Hospital Care Statistics Branch at ambcare@cdc.gov or 301-458-4600 for more information.
The 2015 NAMCS Community Health Center Public Use Data File is now available for downloading, along with SAS, Stata, and SPSS files for reading and formatting the data. The Public Use Data File Documentation can be requested by calling 301-458-4600 or emailing ambcare@cdc.gov. As soon as the 508-compliant version of the documentation is available, it will be posted to the website. (4/2022)
2015 NAMCS Community Health Center summary tables [PDF – 1 MB] (4/2022)
A new version of the 2019 NHAMCS Emergency Department public use data file was released which includes the ED weight variable (EDWT) only on the first record for each hospital (based on the HOSPCODE variable). The initial file release included this variable on all ED records. It is easier to produce facility-level estimates when the EDWT variable is present on only one record for each ED, and that is the way the file has traditionally been released. To calculate facility-level estimates correctly, it is recommended that the revised version of the file be downloaded. Visit-level estimates are unaffected. Pre-made SAS, SPSS, and Stata datasets have also been updated to reflect this change (2/2022)

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