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hcup-us.ahrq.gov/toolssoftware/ccs/ccs.jsp
September 01, 2025 - Clinical Classifications Software (CCS) for ICD-9-CM
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hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/about_grants_cd.jsp
July 01, 2016 - Clinical Content Enhancement Toolkit
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hcup-us.ahrq.gov/db/nation/nis/NIS_1998_Hospital.pdf
January 01, 1998 - Description of Data Elements
This document contains cumulative descriptions of data elements across all
years of HCUP data from 1988 to the current data year.
AHAID - AHA hospital identifier
The hospital identifier (AHAID) contains the 7-digit American Hospital Association (AHA) hospital identifier
that the A…
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hcup-us.ahrq.gov/db/nation/nis/NIS_1999_HOSPITAL.pdf
January 01, 1999 - http://172.16.18.243/db/nation/nis/nishospnotes.jsp
Description of Data Elements
Nationwide Inpatient Sample (NIS)
This document contains cumulative descriptions of data elements across all
states and years of HCUP data from 1988 to the current data year. Please refer
to the Overview of the Nationwide Inpatient…
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hcup-us.ahrq.gov/datainnovations/clinicaldata/AHRQHCUP11182009CSullivanFinal.jsp
April 01, 2011 - Adding Clinical Data Elements to Administrative Data
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hcup-us.ahrq.gov/reports/methods/2006_8.pdf
January 01, 2006 - other unmeasured differences in coding of race and ethnicity across the States and hospitals
cannot be assessed
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hcup-us.ahrq.gov/reports/methods/2004-05.pdf
January 01, 2004 - other unmeasured differences in coding of race and ethnicity across the States and hospitals
cannot be assessed
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hcup-us.ahrq.gov/reports/methods/2005_06.pdf
January 01, 2005 - other unmeasured differences in coding of race and ethnicity across the States and hospitals
cannot be assessed
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hcup-us.ahrq.gov/reports/statbriefs/sb230-7-Day-Versus-30-Day-Readmissions.pdf
December 01, 2016 - No more than one readmission is counted within the 7- or 30-day period, because the
outcome measure assessed
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hcup-us.ahrq.gov/reports/statbriefs/sb248-Hospital-Readmissions-2010-2016.pdf
January 01, 2016 - No more than one
readmission is counted within the 30-day period, because the outcome measure assessed
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hcup-us.ahrq.gov/reports/statbriefs/sb211-Hospital-Variation-C-sections-2013.jsp
September 01, 2016 - Variation in C-section rates is assessed by examining the distribution of C-section rates across hospitals
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hcup-us.ahrq.gov/reports/statbriefs/sb211-Hospital-Variation-C-sections-2013.pdf
January 01, 2013 - Variation in C-section rates is assessed by examining the distribution of C-section
rates across hospitals
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hcup-us.ahrq.gov/datainnovations/clinicaldata/AppendixEAHRQProjectDetails.jsp
October 05, 2010 - project, MPA will prepare comparative performance reports for participating hospitals for each outcome assessed
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hcup-us.ahrq.gov/reports/natstats/commdx/commdx.htm
October 01, 1999 - Most Common Diagnoses and Procedures in U.S. Community Hospitals, 1996
Most Common Diagnoses and Procedures in U.S. Community Hospitals, 1996
Contents
Foreword HCUP Databases Software
Tools Most Common Diagnoses and Procedures Data and methods Data
source Study
sample Diagnose…
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hcup-us.ahrq.gov/toolssoftware/ccs/ccsfactsheet.jsp
September 01, 2025 - HCUP-US Tools & Software Page
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hcup-us.ahrq.gov/reports/statbriefs/sb267-Hurricanes-Injuries-ED-Visits-2005-2016.pdf
January 01, 2016 - Impact of Hurricanes on Injury-Related Emergency Department Visits, 2005-2016
1
STATISTICAL BRIEF #267
November 2020
Audrey J. Weiss, Ph.D., Marguerite L. Barrett, M.S., and
William J. Freeman, Dr.PH., M.P.H.
Introduction
Severe hurricanes strike portions of the United States nearly
ev…
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hcup-us.ahrq.gov/db/nation/nis/APS-DRGsWeightsV25Public.pdf
June 01, 2009 - ___APS-DRGs-Weights_Public.book
4 0 0 C a p i t a l B o u l e v a r d • R o c k y H i l l , C T 0 6 0 6 7 • 1 - 8 0 0 - 9 9 9 - 3 7 4 7
U s e r ’ s G u i d e
ALL PAYER SEVERITY-ADJUSTED DRGS
(APS-DRGS®) NORMALIZED CHARGE, LOS,
AND MORTALITY WEIGHTS
FOR PUBLIC USE
VERSION 25
PUB 6.23.2009
APS-DRGs®
…
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hcup-us.ahrq.gov/db/nation/nis/APS-DRGs%20V23%20Weights%20Manual.pdf
August 01, 2006 - ___APS-DRGs-Weights_Public.book
4 0 0 C a p i t a l B o u l e v a r d • R o c k y H i l l , C T 0 6 0 6 7 • 1 - 8 0 0 - 8 2 9 - 1 8 4 1
U s e r ’ s G u i d e
APS-DRGs
ALL PAYER SEVERITY-ADJUSTED DRGS
(APS-DRGS®)
NORMALIZED CHARGE, LOS, AND
MORTALITY WEIGHTS
FOR PUBLIC USE
VERSION 23
®
P UB 8.28.2…
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hcup-us.ahrq.gov/datainnovations/raceethnicitytoolkit/ca13.pdf
January 01, 2009 - Frequently Asked Questions about Collecting R/E/L Data
Questions & Answers
FREQUENCY OF ASKING ABOUT RACE, ETHNICITY, AND LANGUAGE
Do we need to ask [race, ethnicity, and language] for each visit if it was given by
patient at first visit?
Response: Patients do not need to be asked their race, ethnicity, and…
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hcup-us.ahrq.gov/datainnovations/raceethnicitytoolkit/ca7.jsp
November 01, 2014 - Why Should Hospitals Collect R/E/L Data?
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