HCUPnet is an online statistical tool created as a part of the Healthcare Cost and Utilization Project (HCUP), an initiative of the US Department of Health and Human Services Agency for Health Care Policy and Research (AHCPR). HCUPnet allows users to generate customized statistical reports in order to identify, analyze, and track national data on "hospital utilization, access, charges, quality and outcomes." Data in the customized reports are derived from the latest Nationwide Inpatient Sample (NIS). Explicit instructions for using this interactive online tool are available at the site.