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The Nationwide Ambulatory Surgery Sample (NASS) comprises three files in comma separated value (CSV) format: Encounter File, Hospital File, and Supplemental File. The following links provide file specifications for the NASS including the dataset name, number of records, and record layout for the comma-separated values (CSV) files.
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2021 NASS
Encounter File
Return to Contents 2020 NASS Encounter File
Return to Contents 2019 NASS Encounter File
Return to Contents 2018 NASS Encounter File
Return to Contents 2017 NASS Encounter File
Return to Contents 2016 NASS Encounter File
Return to Contents |
| Internet Citation: NASS File Specifications. Healthcare Cost and Utilization Project (HCUP). April 2024. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/nation/nass/nassfilespecs.jsp. |
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| Last modified 04/05/24 |
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