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NEDS File Specifications

 
Each year of the Nationwide Emergency Department Sample (NEDS) is comprised of the core data file and three additional files, in comma-separated value (CSV) format: Hospital Weights File, Supplemental Emergency Department File, and Supplemental Inpatient File. Beginning data year 2018, the Diagnosis and Procedure Groups File is available. The following links provide file specifications for the NEDS including the dataset name, number of records, and record layout for the comma-separated values (CSV) files.
 
2021 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File Diagnosis and Procedure Groups File
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2020 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File Diagnosis and Procedure Groups File
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2019 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File Diagnosis and Procedure Groups File
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2018 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File Diagnosis and Procedure Groups File
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2017 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2016 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2015 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Quarters 1-3 (ICD-9-CM) Supplemental Emergency Department File Quarter 4 (ICD-10-CM) Supplemental Inpatient File Quarters 1-3 (ICD-9-CM) Supplemental Inpatient File Quarter 4 (ICD-10-CM/PCS)
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2014 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2013 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2012 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2011 NEDS, Version 2

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2011 NEDS, Version 1

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2010 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2009 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2008 NEDS

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2007 NEDS, CSV File Version 2

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2007 NEDS, CSV File Version 1

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2006 NEDS, CSV File Version 3

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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2006 NEDS, CSV File Version 1 and 2

Core File Hospital Weights File Supplemental Emergency Department File Supplemental Inpatient File
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Internet Citation: NEDS File Specifications. Healthcare Cost and Utilization Project (HCUP). October 2022. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/nation/neds/nedsfilespecs.jsp.
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Last modified 10/5/22