National Emergency Department Inventories (NEDI)

The National ED Inventories (NEDI) are ongoing surveys that contain data on all EDs in a specific country/state/city, including facility location and annual visit volume.  Each inventory was developed through collaboration of a Country/State/City Coordinator with EMNet staff. 

U.S. Surveys

NEDI-USA: 2001, 2003, 2005, 2007, 2009, 2011, 2012, 2013
       Annual Surveys: 2015, 2016, 2017, 2018, 2019, 2020, 2021, and 2022 

The next survey will launch in early 2025

NEDI-New England: 2014 and 2018 (CT, MA, ME, NH, RI, VT)

NEDI-State: 2005 (MA), 2008 (CO, GA, MA, OR), 2009 (AR, HI, MN, VT, WY), and 2021 (CA)

NEDI-Indian Health Service: 2014

To learn about other ED inventory projects around the globe, visit the NEDI-International page here.

To learn about rural U.S. ED closures and openings since 2001, click here.

To learn about the applications of NEDI data in community projects, visit the Community page here.

If you have any questions about the NEDI projects, please contact Krislyn Boggs, MPH at