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Agency for Healthcare Research and Quality

The Agency for Healthcare Research and Quality's (AHRQ) mission is to produce evidence to make health care safer, higher quality, more accessible, equitable, and affordable, and to work within the U.S. Department of Health and Human Services and with other partners to make sure that the evidence is understood and used.

License

Other (Not Open)

Other Access

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HCUP Nationwide Emergency Department Database (NEDS) Restricted Access File

The Nationwide Emergency Department Sample (NEDS) was created to enable analyses of emergency department (ED) utilization patterns and support public health professionals, administrators, policymakers, and clinicians in their decision-making regarding this critical source of care. The NEDS can be weighted to produce national estimates. Restricted access data files are available with a data use agreement and brief online security training.

The NEDS is the largest all-payer ED database in the United States. It was constructed using records from both the HCUP State Emergency Department Databases (SEDD) and the State Inpatient Databases (SID), both also described in healthdata.gov. The SEDD capture information on ED visits that do not result in an admission (i.e., treat-and-release visits and transfers to another hospital). The SID contain information on patients initially seen in the emergency room and then admitted to the same hospital.

The NEDS contains 25-30 million (unweighted) records for ED visits for over 950 hospitals and approximates a 20-percent stratified sample of U.S. hospital-based EDs.

The NEDS contains information about geographic characteristics, hospital characteristics, patient characteristics, and the nature of visits (e.g., common reasons for ED visits, including injuries). The NEDS contains clinical and resource use information included in a typical discharge abstract, with safeguards to protect the privacy of individual patients, physicians, and hospitals (as required by data sources). It includes ED charge information for over 85% of patients, regardless of payer, including patients covered by Medicaid, private insurance, and the uninsured. The NEDS excludes data elements that could directly or indirectly identify individuals, hospitals, or states.

Data and Resources

FieldValue
Publisher
Bureau Code
009:33 - Agency for Healthcare Research and Quality
Modified Date
2017-11-27
Release Date
2012-11-11
Frequency
Annually
Homepage URL
Identifier
26887d97-e5da-4b40-893d-0cb9bebf1948
Temporal Coverage
Monday, January 2, 2006 - 00:00 to Thursday, December 31, 2015 - 05:00
License
Other (Not Open)
Author
HCUP
Data Dictionary
Contact Name
HCUP User Support
Contact Email
Public Access Level
Restricted
Additional Info: 
FieldValue

Agency Program URL

http://hcup-us.ahrq.gov/

Collection Frequency

Annually

Date Released

2010-04-01 00:00:00

Date Updated

2017-11-27

Group Name

Healthcare Cost and Utilization Project

License Agreement Required

1

Subject Area 1

Epidemiology

Subject Area 2

Health Care Cost

Subject Area 3

Health Care Providers

Technical Documentation

http://www.hcup-us.ahrq.gov/db/nation/neds/nedsdbdocumentation.jsp

Unit of Analysis

emergency department visit

author_id

http://healthdata.gov/id/agency/ahrq

hd2-workflow-id

23875

publisher_1

Department of Health & Human Services