HCUP-US Databases

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About the HCUP-US Databases


The HCUP family of administrative longitudinal databases contains discharge-level information on inpatient care in U.S. hospitals or ambulatory surgery encounters. These databases are created by AHRQ through a Federal-State-Industry partnership.

Access the Datasets


Contents of the Data

The main categories listed are:

  • Nationwide Inpatient Sample (NIS)
  • Kids’ Inpatient Database (KID)
  • Nationwide Emergency Department Sample (NEDS)
  • State Inpatient Databases (SID)
  • State Ambulatory Surgery Databases (SASD)
  • State Emergency Department Databases (SEDD)