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Healthcare Cost and Utilization Project-State Emergency Department Databases (HCUP-SEDD)


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 Emergency Department Databases (SEDD), a component of HCUP, is a set of databases reflecting encounters in hospital-affiliated emergency department sites in participating states. The state emergency department encounter abstracts are translated into a uniform format to facilitate multi-state comparisons and analyses.


Agency for Healthcare Research and Quality (AHRQ)

Data Years Available






Selected Content

The HCUP (SEDD) 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 (SEDD) includes encounters in hospital-affiliated emergency department sites in 27 participating states.


The HCUP (SEDD) databases are provided to HCUP by state data organizations. The composition and completeness of the data files may vary from state to state.

Response rate and sample size


Interpretation Issues

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


National Center for Health Statistics. Health United States 2009: With Special Feature on Medical Technology. Hyattsville, Maryland. 2010; pp 452-453.