National (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. 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 data elements descriptions for the NIS.
Data element descriptions explain how the data element is coded in the HCUP databases, what the uniform values are, and State-specific coding practices. The descriptions are cumulative across all States and years of NIS data from 1988 to the current data year. Please note the following:
For a description of how HCUP data elements are coded, restriction on use, uniform values, and state-specific coding practices, check the corresponding boxes below and then click the "View Description of Data Elements".
|Internet Citation: HCUP NIS Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). April 2015. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/nation/nis/nisdde.jsp.|
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|Last modified 4/6/15|