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Healthcare Cost and Utilization Project-State Inpatient Databases


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
Data Years Available: 
Mode of Collection: 
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 Rates 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.

HCUP-US SID Overview and related web pages.