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hcup-us.ahrq.gov/reports/factsandfigures/2007/section1_TOC.jsp
January 01, 2007 - Reports & Publications 
 
 
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 About … Reports Archive 
 
 
 
 
 
 
 
 DATA VISUALIZATIONS 
 
 
 
 
 
 DATA QUERY TOOLS … HOSPITAL STAYS 
 
 
    	Section 1: Overview Statistics for Inpatient Hospital Stays
         
 EXHIBIT … Community Hospitals   PDF 
 EXHIBIT 1.2  Inpatient Hospital Stays and Average Length of Stay   PDF … EXHIBIT 1.3 Reasons for Hospital Stays 
 EXHIBIT 1.4 Discharge Status   PDF 
 EXHIBIT 1.5 Patient Age
                                     
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hcup-us.ahrq.gov/db/vars/cmr_aaa/nrdnote.jsp
August 01, 2015 - Reports & Publications 
 
 
 Data Visualizations 
 
 
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 About … HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … Reports Archive 
 
 
 
 
 
 
 
 DATA VISUALIZATIONS 
 
 
 
 
 
 DATA QUERY TOOLS … identify pre-existing conditions (i.e., comorbidities) that are not directly related to the reason for the inpatient … For data prior to the fourth quarter of 2015, the comorbidity measures are stored in the data element
                                     
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hcup-us.ahrq.gov/db/vars/cmr_aaa/nassnote.jsp
August 01, 2019 - Reports & Publications 
 
 
 Data Visualizations 
 
 
 Data Query Tools 
 
 
 Home 
 
 
 About … HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … Reports Archive 
 
 
 
 
 
 
 
 DATA VISUALIZATIONS 
 
 
 
 
 
 DATA QUERY TOOLS … identify pre-existing conditions (i.e., comorbidities) that are not directly related to the reason for the inpatient … For data prior to the fourth quarter of 2015, the comorbidity measures are stored in the data element
                                     
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hcup-us.ahrq.gov/db/vars/s_disc_u/nedsnote.jsp
May 01, 2015 - Reports & Publications 
 
 
 Data Visualizations 
 
 
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 About … HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … S_DISC_U differs by HCUP database: 
 
 For the NIS prior to 2012, S_DISC_U contains the total number of inpatient … For the NIS beginning in 2012, S_DISC_U contains the total number of inpatient discharges for the stratum … For the NRD, S_DISC_U contains the total number of inpatient discharges for the stratum.
                                     
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hcup-us.ahrq.gov/db/vars/s_disc_u/nrdnote.jsp
August 01, 2015 - Reports & Publications 
 
 
 Data Visualizations 
 
 
 Data Query Tools 
 
 
 Home 
 
 
 About … HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … S_DISC_U differs by HCUP database: 
 
 For the NIS prior to 2012, S_DISC_U contains the total number of inpatient … For the NIS beginning in 2012, S_DISC_U contains the total number of inpatient discharges for the stratum … For the NRD, S_DISC_U contains the total number of inpatient discharges for the stratum.
                                     
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hcup-us.ahrq.gov/db/vars/s_disc_u/nisnote.jsp
September 01, 2008 - Reports & Publications 
 
 
 Data Visualizations 
 
 
 Data Query Tools 
 
 
 Home 
 
 
 About … HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … S_DISC_U differs by HCUP database: 
 
 For the NIS prior to 2012, S_DISC_U contains the total number of inpatient … For the NIS beginning in 2012, S_DISC_U contains the total number of inpatient discharges for the stratum … For the NRD, S_DISC_U contains the total number of inpatient discharges for the stratum.
                                     
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hcup-us.ahrq.gov/db/vars/s_disc_u/kidnote.jsp
September 01, 2008 - Reports & Publications 
 
 
 Data Visualizations 
 
 
 Data Query Tools 
 
 
 Home 
 
 
 About … HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … S_DISC_U differs by HCUP database: 
 
 For the NIS prior to 2012, S_DISC_U contains the total number of inpatient … For the NIS beginning in 2012, S_DISC_U contains the total number of inpatient discharges for the stratum … For the NRD, S_DISC_U contains the total number of inpatient discharges for the stratum.
                                     
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hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2005_Design_Report.pdf
January 01, 2005 - Each 
year the NIS contains data from approximately eight million hospital stays – all discharge 
records … from approximately 1,000 hospitals selected from HCUP State Inpatient Databases 
(SID) data. … from approximately 1,000 hospitals selected from HCUP State Inpatient Databases 
(SID) data. … Discharge outcomes of interest include trends in inpatient 
treatment with respect to: 
 
• Frequency … If an AHA 
community hospital could not be matched to the discharge data provided by the data source,
                                     
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hcup-us.ahrq.gov/db/nation/neds/NEDS2010Introductionv3.pdf
November 01, 2015 - Data Elements in the NEDS Supplemental Inpatient File ........................................... 5 … HCUP (11/30/15)   2010 NEDS Introduction  8 
Supplemental Inpatient File:  This file contains data elements … Refer to 
Appendix III, Table 3 for a list of data elements in the NEDS Supplemental Inpatient File. … Data Elements in the NEDS Supplemental Inpatient File 
 
Type of 
Data Element 
HCUP  
Data Element … Geographic Region from 
Two ED Data Sources, 2010 
ED Visits Resulting in Inpatient Admissions 
ED
                                     
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hcup-us.ahrq.gov/reports/statbriefs/sb185-Hospital-Intensive-Care-Units-2011.jsp
December 01, 2014 - HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … Types of hospitals included in HCUP State Inpatient Databases 
This analysis used State Inpatient Databases … Unit of analysis 
The unit of analysis is the hospital discharge (i.e., the hospital stay), not a person … About the SID 
 
The HCUP State Inpatient Databases (SID) are hospital inpatient databases from data … The SID contain the universe of the inpatient discharge abstracts in the participating HCUP States, translated
                                     
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hcup-us.ahrq.gov/db/nation/neds/NEDS2014Introduction.pdf
December 12, 2016 - Data Elements in the NEDS Supplemental Inpatient File ........................................ 7 
Table … Supplemental Inpatient File:  This file contains data elements that are not specific to the ED, 
such … Refer to 
Appendix C, Table C.3 for a list of data elements in the NEDS Supplemental Inpatient File. … Data Elements in the NEDS Supplemental Inpatient File 
Type of 
Data Element 
HCUP  
Data Element Coding … Data Elements in the NEDS Supplemental Inpatient File
	Table C.4.
                                     
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hcup-us.ahrq.gov/db/vars/mdnum1_s/nisnote.jsp
September 01, 2008 - When the MDNUM1 in the ambulatory surgery data and the inpatient data are the same, the synthetic identifier … Since this conversion was not done in prior years of HCUP inpatient data, the encrypted physician 1 identifiers … Caution should be used when tracking physicians back to 1999 inpatient data. … The encrypted values supplied by the data source in the 1999 inpatient data contained slightly different … coding than the values supplied beginning in the 2000 inpatient and ambulatory surgery data.
                                     
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hcup-us.ahrq.gov/db/nation/nis/NIS_Sources_and_Restrictions_2001.pdf
January 01, 2001 - HCUP NIS (6/5/03) 1 Sources of NIS Data and  
  State-Specific Restrictions  
Sources of NIS Data … Care Cost Containment Council requested that no more 
than 40% of Illinois discharges appear in any discharge … quarter of NIS 
data … Missing Discharges 
 
The Nebraska Hospital Association prohibits the release of discharge 
records … VA  Virginia Health Information  
 
 Confidentiality of Hospitals  
 
The Nationwide Inpatient Sample
                                     
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hcup-us.ahrq.gov/db/vars/prccsr_aaannn/nrdnote.jsp
August 01, 2015 - Database Information 
 
 
 
 Research Tools 
 
 
 Request Data … Reports & Publications 
 
 
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 About … HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … Reports Archive 
 
 
 
 
 
 
 
 DATA VISUALIZATIONS 
 
 
 
 
 
 DATA QUERY TOOLS … The team extensively reviewed the CCSR at each stage of its development using the HCUP State Inpatient
                                     
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hcup-us.ahrq.gov/tech_assist/toolstutorial/508/508course.jsp
September 30, 2025 - Reports & Publications 
 
 
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 About … ICD-9-CM diagnosis and procedure coding system with the ICD-10-CM diagnosis coding system for most inpatient … and outpatient medical encounters and the ICD-10-PCS procedure coding system for inpatient procedures … of the discharge year. … In this example we are applying the CCS for ICD-10-PCS (beta version) to the 2016 National Inpatient
                                     
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hcup-us.ahrq.gov/datainnovations/raceethnicitytoolkit/case_for_re.jsp
February 01, 2025 - HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … underserved racial/ethnic groups have trouble understanding their medical conditions, treatment plans, or discharge … at improving R/E/L data. … (Developed by the California grantee) 
 
 Collection and Use of Race and Ethnicity Data for Discharge … A presentation describing the purpose of the project, the NM Hospital Inpatient Discharge Database (
                                     
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hcup-us.ahrq.gov/db/vars/asource/nisnote.jsp
September 01, 2008 - HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … care (this hospital) 
 2 
 Another hospital 
 
 
 522 
 Acute inpatient care (another hospital) … hospital care (not a hospital) 
 
 
 6m2, where m = 1-3 
 Other inpatient hospital care 
 
 
 8m2, where … residential care facility (2), ambulatory surgery (3), skilled nursing/intermediate care (4), acute inpatient … hospital care (5), other inpatient hospital care (6), newborn (7), prison/jail (8), other (9).
                                     
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hcup-us.ahrq.gov/db/vars/ageday/kidnote.jsp
September 01, 2008 - HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … When processing the 1996 HCUP inpatient data, no adjustment was made for the leap year when age was calculated … California assigned the date of birth to admission date when the admission date was not reported and the discharge … New York 
 Beginning with the 2008 data, the HCUP data element AGEDAY is missing  (.) … prior to 1998 and 
 Oregon reported age in days at discharge beginning in the 1998 data.
                                     
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hcup-us.ahrq.gov/reports/natstats/commdx/table2j.htm
February 11, 2011 - The top 100 
principal diagnoses and their associated principal procedures:  HCUP 
Nationwide Inpatient … You may need to scroll your browser to the right to see all the data.)
  D91. … You may need to scroll your browser to the right to see all the data.)
  D92. … You may need to scroll your browser to the right to see all the data.)
  D93. … You may need to scroll your browser to the right to see all the data.)
  D94.
                                     
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hcup-us.ahrq.gov/reports/natstats/commdx/table2i.htm
February 11, 2011 - The top 100 
principal diagnoses and their associated principal procedures:  HCUP 
Nationwide Inpatient … You may need to scroll your browser to the right to see all the data.)
  D81. … You may need to scroll your browser to the right to see all the data.)
  D82. … You may need to scroll your browser to the right to see all the data.)
  D83. … You may need to scroll your browser to the right to see all the data.)
  D84.