Skip Navigation
Healthcare Cost and Utilization Project logo
NEDS File Specifications
The NEDS is a set of hospital-based emergency department databases included in the HCUP family. These databases are created by AHRQ through a Federal-State-Industry partnership.
search icon
 
 
Nationwide Emergency Department Sample (NEDS)

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, and is an exceptional resource for conducting research on high-profile emergent health delivery issues. 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 following links provide file specifications for the NEDS including the dataset name and number of records. Because the files are provided in comma-separated values (CSV) files, a record layout for the data elements is not provided.
 
File Specifications for the NEDS

2009 NEDS

Core File
  • Data Set Name: NEDS_2009_CORE
  • Number of Records: 28,861,047
  • Number of Data Elements: 95
  • Record layout
Hospital Weights File
  • Data Set Name: NEDS_2009_HOSPITAL
  • Number of Records: 964
  • Number of Data Elements: 15
  • Record layout
Supplemental Emergency Department File
  • Data Set Name: NEDS_2009_ED
  • Number of Records: 24,465,837
  • Number of Data Elements: 63
  • Record layout
Supplemental Inpatient File
  • Data Set Name: NEDS_2009_IP
  • Number of Records: 4,395,210
  • Number of Data Elements: 40
  • Record layout

Return to Contents


2008 NEDS

Core File
  • Data Set Name: NEDS_2008_CORE
  • Number of Records: 28,447,148
  • Number of Data Elements: 76
  • Record layout
Hospital Weights File
  • Data Set Name: NEDS_2008_HOSPITAL
  • Number of Records: 980
  • Number of Data Elements: 15
  • Record layout
Supplemental Emergency Department File
  • Data Set Name: NEDS_2008_ED
  • Number of Records: 24,013,429
  • Number of Data Elements: 63
  • Record layout
Supplemental Inpatient File
  • Data Set Name: NEDS_2008_IP
  • Number of Records: 4,433,719
  • Number of Data Elements: 39
  • Record layout

Return to Contents


2007 NEDS, CSV File Version 2

Core File
  • Data Set Name: NEDS_2007V2_CORE
  • Number of Records: 26,627,923
  • Number of Data Elements: 76
  • Record layout
Hospital Weights File
  • Data Set Name: NEDS_2007V2_HOSPITAL
  • Number of Records: 966
  • Number of Data Elements: 15
  • Record layout
Supplemental Emergency Department File
  • Data Set Name: NEDS_2007V2_ED
  • Number of Records: 22,476,739
  • Number of Data Elements: 48
  • Record layout
Supplemental Inpatient File
  • Data Set Name: NEDS_2007V2_IP
  • Number of Records: 4,151,184
  • Number of Data Elements: 38
  • Record layout

Return to Contents


2007 NEDS, CSV File Version 1

Core File
  • Data Set Name: NEDS_2007_CORE
  • Number of Records: 26,971,660
  • Number of Data Elements: 76
  • Record layout
Hospital Weights File
  • Data Set Name: NEDS_2007_HOSPITAL
  • Number of Records: 966
  • Number of Data Elements: 15
  • Record layout
Supplemental Emergency Department File
  • Data Set Name: NEDS_2007_ED
  • Number of Records: 22,754,918
  • Number of Data Elements: 48
  • Record layout
Supplemental Inpatient File
  • Data Set Name: NEDS_2007_IP
  • Number of Records: 4,216,742
  • Number of Data Elements: 38
  • Record layout

Return to Contents


2006 NEDS, CSV File Version 3

Core File
  • Data Set Name: NEDS_2006V2_CORE
  • Number of Records: 25,702,597
  • Number of Data Elements: 76
  • Record layout
Hospital Weights File
  • Data Set Name: NEDS_2006V2_HOSPITAL
  • Number of Records: 955
  • Number of Data Elements: 15
  • Record layout
Supplemental Emergency Department File
  • Data Set Name: NEDS_2006V2_ED
  • Number of Records: 21,732,232
  • Number of Data Elements: 48
  • Record layout
Supplemental Inpatient File
  • Data Set Name: NEDS_2006V2_IP
  • Number of Records: 3,970,365
  • Number of Data Elements: 38
  • Record layout

Return to Contents


2006 NEDS, CSV File Version 1 and 2

Core File
  • Data Set Name: NEDS_2006_CORE
  • Number of Records: 25,954,816
  • Number of Data Elements: 76
  • Record layout
Hospital Weights File
  • Data Set Name: NEDS_2006_HOSPITAL
  • Number of Records: 958
  • Number of Data Elements: 15
  • Record layout
Supplemental Emergency Department File
  • Data Set Name: NEDS_2006_ED
  • Number of Records: 21,946,811
  • Number of Data Elements: 48
  • Record layout
Supplemental Inpatient File
  • Data Set Name: NEDS_2006_IP
  • Number of Records: 4,008,005
  • Number of Data Elements: 38
  • Record layout

Return to Contents



Internet Citation: HCUP NEDS File Specifications. Healthcare Cost and Utilization Project (HCUP). September 2011. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/nation/neds/nedsfilespecs.jsp.
Are you having problems viewing or printing pages on this Website?
If you have comments, suggestions, and/or questions, please contact hcup@ahrq.gov.
Last modified 9/14/11