The Nationwide Emergency Department Sample (NEDS) produces national estimates about emergency department (ED) visits across the country. The NEDS describes ED visits, regardless of whether they result in admission. One of the most distinctive features of the NEDS is its large sample size, which allows for analysis across hospital types and the study of relatively uncommon disorders and procedures.

The links below provide detailed documentation for the NEDS, from a high-level Overview to all the detailed specifications, restrictions, and resources necessary for researchers working and publishing with the NEDS.