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Healthcare Cost and Utilization Project-State Inpatient Databases (HCUP-SID)


The Healthcare Cost and Utilization Project (HCUP) is a family of health care databases and related software tools developed through a federal-state-industry partnership to build a multistate health data system for health care research and decision making. The State Inpatient Databases (SID), a component of HCUP, is a set of hospital databases from data organizations in participating states. The SID encompasses about 90 % of all U.S. community hospital discharges. Some states include discharges from specialty facilities, such as psychiatric hospitals.


Agency for Healthcare Research and Quality (AHRQ)

Data Years Available






Selected Content

The HCUP (SID) contains a core set of clinical and nonclinical information found in a typical discharge abstract, including all-listed diagnoses and procedures, discharge status, patient demographics and procedures, and charges for all patients regardless of payer.

Population covered

The current HCUP (SID) includes hospital discharge files in 40 participating states.


The HCUP (SIDS) data bases are provided to HCUP by state data organizations.

Response rate and sample size


Interpretation Issues

The number of states in the HCUP (SID) varies by year.


National Center for Health Statistics. Health United States 2009: With Special Feature on Medical Technology. Hyattsville, Maryland. 2010; pp 452-453. and related web pages. Accessed August 11, 2010.