hcupnis.htm Research The HCUP Nationwide Inpatient Sample (NIS) Overview has been moved tohttp://www.hcup-us.ahrq.gov/nisoverview.jspPlease update your bookmark. Current as of December 2012 Internet Citation: hcupnis.htm. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/data/hcup/hcupnis.html