The Nationwide Inpatient Sample (NIS)
The Nationwide Inpatient Sample (NIS) is the largest all-payer inpatient care database in the United States, containing data on more than seven million hospital stays from approximately 1,000 hospitals. Its large sample size is ideal for developing national and regional estimates and enables analyses of rare conditions, uncommon treatments, and special populations. The following links provide detailed documentation for the NIS.
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Restrictions on the Use of the NIS
Description of NIS Files
Availability of Data Elements
Description of Data Elements in the NIS
Known Data Issues
HCUP Tools: Labels and Formats
NIS Related Reports
HCUP Supplemental Files
|Internet Citation: HCUP NIS Database Documentation. Healthcare Cost and Utilization Project (HCUP). April 2013. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/nation/nis/nisdbdocumentation.jsp.|
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|Last modified 4/23/13|