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hcup-us.ahrq.gov/db/state/siddbdocumentation.jsp
May 01, 2025 - State Inpatient Databases (SID) Database
Documentation
The State Inpatient Databases (SID) are State-specific files
that contain all inpatient care records in participating states.
Together, the SID encompass more than 95 percent of all U.S.
hospital discharges. The uniform format of the SID …
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hcup-us.ahrq.gov/db/state/sedddbdocumentation.jsp
April 01, 2025 - State Emergency Department Databases
(SEDD) Database Documentation
The State Emergency Department Databases (SEDD) are a set of
longitudinal State-specific emergency department (ED) databases
included in the HCUP family. The SEDD capture discharge information
on all emergency departmen…
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hcup-us.ahrq.gov/db/state/sasddbdocumentation.jsp
April 01, 2025 - State Ambulatory Surgery and Services
Databases (SASD) Database Documentation
The State Ambulatory Surgery and Services Databases (SASD)
are State-specific files that include data for ambulatory surgery
and other outpatient services from hospital-owned facilities. In
addition, some States pro…
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hcup-us.ahrq.gov/db/nation/nrd/nrddbdocumentation.jsp
April 01, 2025 - Nationwide Readmissions Database (NRD) Database Documentation
The Nationwide Readmissions Database (NRD) is a unique and powerful database designed to
support various types of analyses of national readmissions for all patients regardless of
the expected payer for the hospital stay. The NRD includes di…
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hcup-us.ahrq.gov/db/nation/kid/kiddbdocumentation.jsp
April 01, 2025 - Kids' Inpatient Database (KID) Database Documentation
The Kids' Inpatient Database (KID) is the largest publicly available all-payer pediatric inpatient care database in the United States, containing data from two to three million hospital stays each year. Its large sample size is ideal for developing national and …
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hcup-us.ahrq.gov/db/nation/nass/nassdbdocumentation.jsp
June 01, 2025 - Nationwide Ambulatory Surgery Sample (NASS) Database Documentation
The largest all-payer ambulatory surgery database in the United States, the Nationwide Ambulatory Surgery Sample (NASS) produces national estimates of major ambulatory surgery encounters in hospital-owned facilities. The NASS contains clinical and r…
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hcup-us.ahrq.gov/db/nation/nis/nisdbdocumentation.jsp
May 01, 2025 - National (Nationwide) Inpatient Sample (NIS) Database Documentation
The National (Nationwide) Inpatient Sample (NIS) is the largest publicly available all-payer inpatient care database in the United States, containing data on more than seven million hospital stays. Its large sample size is ideal for developing nati…
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hcup-us.ahrq.gov/db/nation/neds/nedsdbdocumentation.jsp
May 01, 2025 - Nationwide Emergency Department Sample (NEDS) Database Documentation
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 fea…
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hcup-us.ahrq.gov/db/nation/nis/nisarchive.jsp
February 01, 2025 - PDF file, 9,230 KB)
Description of Data Elements
Descriptions can be viewed as a single document
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hcup-us.ahrq.gov/db/nation/neds/nedsarchive.jsp
February 01, 2025 - NEDS Database Documentation Archive
An official website of the Department of Health & Human Services
Search All AHRQ Websites
Careers
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FAQs
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hcup-us.ahrq.gov/db/nation/kid/kidarchive.jsp
February 01, 2025 - KID Database Documentation Archive
An official website of the Department of Health & Human Services
Search All AHRQ Websites
Careers
Contact Us
Espanol
FAQs
Email Updates
…
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hcup-us.ahrq.gov/db/nation/nass/nassarchive.jsp
December 01, 2024 - NASS Database Documentation Archive
An official website of the Department of Health & Human Services
Search All AHRQ Websites
Careers
Contact Us
Espanol
FAQs
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…
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hcup-us.ahrq.gov/db/nation/nrd/nrdarchive.jsp
December 01, 2024 - NRD Database Documentation Archive
An official website of the Department of Health & Human Services
Search All AHRQ Websites
Careers
Contact Us
Espanol
FAQs
Email Updates
…
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hcup-us.ahrq.gov/db/nation/kid/corrections2019.jsp
January 01, 2023 - KID Database Documentation - Corrections
An official website of the Department of Health & Human Services
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hcup-us.ahrq.gov/db/nation/nis/correct_2019and2020.jsp
January 01, 2023 - NIS Database Documentation - Corrections
An official website of the Department of Health & Human Services
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hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/data_collection.jsp
February 01, 2025 - This document carefully describes each data selection step and identifies potential difficulties and … Minnesota grantee)
Coronary Procedures Study: An Outline for Labs ( PDF file, 575 KB; HTML )
Document … Minnesota grantee)
Enhancing Hawaii Hospital Information Content: Data Acquisition ( HTML )
Document … (Developed by the Hawaii grantee)
LOINC Overview and Instructions ( PDF file, 102 KB; HTML )
Document … The document includes a background description of LOINC, instructions for submission, frequently asked
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hcup-us.ahrq.gov/db/nation/neds/nedscorrections.jsp
February 01, 2013 - In some cases, there is a downloadable document that either provides more information or provides a program
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hcup-us.ahrq.gov/db/nation/nis/corrections_2011.jsp
January 01, 2011 - NIS Database Documentation - Corrections
An official website of the Department of Health & Human Services
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hcup-us.ahrq.gov/db/nation/kid/corrections2003.jsp
May 01, 2008 - Corrections to the Kids' Inpatient Database (KID) - 2003 Please refer to the information below for corrections to the KID data set.
Correction to 2003 KID Core File, KID_STRATUM
In the 2003 KID Core File, KID_STRATUM values of 9999 (Freestanding Childrens Hospitals) were inadvertently saved as 9998. To cor…
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hcup-us.ahrq.gov/db/quality.pdf
January 31, 2025 - HCUP (2/20/2025) i Quality Control Procedures Document … INTRODUCTION
This document describes the procedures used to assess data quality and perform basic … HCUP (2/20/2025) 3 Quality Control Procedures Document … HCUP (2/20/2025) 4 Quality Control Procedures Document … HCUP (2/20/2025) 5 Quality Control Procedures Document