Healthcare Cost and Utilization Project, Nationwide Emergency Department Sample (HCUP NEDS)

Description: The Nationwide Emergency Department Sample (NEDS) is part of a family of databases and software tools developed for the Healthcare Cost and Utilization Project (HCUP). The NEDS is the largest all-payer emergency department (ED) database in the United States, yielding national estimates of hospital-based ED visits. Unweighted, it contains data from approximately 31 million ED visits each year. Weighted, it estimates roughly 143 million ED visits. Dr. Kemper’s data ranges from 2012-2014

Coverage: National/State

Description of Cohort: In 2016, patients visiting hospital-owned emergency departments in 37 states + D.C. (number of participating states varies by year)

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