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hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2011.pdf
January 01, 2011 - INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS) 
Overview of NIS Data 
The Nationwide Inpatient … NIS Data Sources, Hospitals, and Inpatient Stays 
Table 4 in Appendix I contains a summary of the data … The 2011 NIS includes the following compressed files: 
 
Inpatient Core File: This inpatient discharge-level … Summary of NIS Data Sources, Hospitals, and Inpatient Stays, 1988-2011 
Year Data Sources 
Number … Data Elements in the NIS Inpatient Core Files 
Data elements that are italicized are not included in
                                     
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hcup-us.ahrq.gov/reports/methods/2015-03.pdf
January 01, 2015 - Hospital discharge data from inpatient and outpatient settings, 
such as emergency rooms, can be used … Databases (SID) contain inpatient discharge data from a census of 
hospitals in the State. … On inpatient data, the first-
listed diagnosis code reflects the condition established to be chiefly … Percentage of Inpatient Injury Discharges with an Injury E Code 
Geographic Area 
Data Year 
2012 … Sources of 2007 HCUP Inpatient Data for the NHQR and the NHDR 
	Table 3.
                                     
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hcup-us.ahrq.gov/reports/natstats/commdx/commdx.htm
October 01, 1999 - Its analysis is based on 
data from the Nationwide Inpatient Sample of the Healthcare Cost and Utilization … This report, based on data from the latest year of the HCUP  Nationwide Inpatient 
Sample  (NIS), updates … Other problems inherent in hospital inpatient data include missing data, 
underreporting of socially … Diagnosis and 
procedure combinations in hospital inpatient data . … How accurate are hospital discharge 
data for evaluating effectiveness of care?
                                     
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hcup-us.ahrq.gov/reports/projections/2012-02.pdf
January 01, 2012 - Discharge counts exclude inpatient stays that were transferred out to another acute care 
hospital. … Discharge counts exclude inpatient stays that were transferred out to another acute care 
hospital. … Discharge counts exclude inpatient stays that were transferred out to another acute care 
hospital. … Discharge counts exclude inpatient stays that were transferred out to another acute care 
hospital. … Discharge counts exclude inpatient stays that were transferred out to another acute care 
hospital.
                                     
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hcup-us.ahrq.gov/db/nation/nis/NIS_2009_INTRODUCTION.pdf
January 01, 2009 - INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS) 
Overview of NIS Data 
The Nationwide Inpatient … NIS Data Sources, Hospitals, and Inpatient Stays 
Table 4 in Appendix I contains a summary of the data … It includes the following files: 
 
Inpatient Core File: This inpatient discharge-level file contains … Summary of NIS Data Sources, Hospitals, and Inpatient Stays, 1988-2009 
Year Data Sources 
Number … Data Elements in the NIS Inpatient Core Files 
Data elements that are italicized are not included in
                                     
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hcup-us.ahrq.gov/reports/projections/2012-03.pdf
January 01, 2012 - Discharge counts exclude inpatient stays that were transferred 
out to another acute care hospital. … Discharge counts exclude inpatient stays that were transferred 
out to another acute care hospital. … Discharge counts exclude inpatient stays that were transferred 
out to another acute care hospital. … Discharge counts exclude inpatient stays that were transferred 
out to another acute care hospital. … Discharge counts exclude inpatient stays that were transferred 
out to another acute care hospital.
                                     
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hcup-us.ahrq.gov/db/vars/discwt/nassnote.jsp
August 01, 2019 - Reports & Publications 
 
 
 Data Visualizations 
 
 
 Data Query Tools 
 
 
 Home 
 
 
 About … Reports Archive 
 
 
 
 
 
 
 
 DATA VISUALIZATIONS 
 
 
 
 
 
 DATA QUERY TOOLS … weight on the HCUP nationwide databases - Nationwide Inpatient Sample (NIS), Nationwide Emergency Department … NEDS), Nationwide Readmissions Database (NRD), Nationwide Ambulatory Surgery Sample (NASS), and Kids' Inpatient … Prior to 1998, the discharge weight was named DISCWT_U.
                                     
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hcup-us.ahrq.gov/db/state/sedddist/sedddist_filecompnj.jsp
March 01, 2007 - Department of Health and Senior Services provides one source file to HCUP that contains a mixture of inpatient … Starting in 2017, the AS, ED, and other outpatient records are based on admission date, while inpatient … records continue to be based on discharge date. … Prior to 2017, all records in the source file were based on discharge date. … Exclusion of Records During HCUP Data Processing 
 Beginning with 2016 data, records with a discharge
                                     
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hcup-us.ahrq.gov/reports/statbriefs/sb213-Safety-Net-Hospitals-2014.jsp
October 01, 2016 - Reports & Publications 
 
 
 Data Visualizations 
 
 
 Data Query Tools 
 
 
 Home 
 
 
 About … at non-SNHs (data not shown). … Databases 
This analysis used State Inpatient Databases (SID) limited to data from community hospitals … 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/reports/methods/2016-03.pdf
January 01, 2016 - Hospital discharge data from inpatient and outpatient settings, 
such as emergency rooms, can be used … Databases (SID) contain inpatient discharge data from a census of 
hospitals in the State. … On inpatient data, the first-
listed diagnosis code reflects the condition established to be chiefly … Sources of 2007 HCUP Inpatient Data for the NHQR and the NHDR 
	Table 3. … Sources of 2007 HCUP Inpatient Data for the NHQR and the NHDR 
	Table 3.
                                     
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hcup-us.ahrq.gov/reports/statbriefs/sb313-prevalence-burden-HAIs-2016-2021.pdf
January 01, 2021 - In 2015, 1 in 31 hospital 
inpatients had an HAI at any given time.2 HAIs include, but are not limited … Data Source 
This Statistical Brief uses data from the 2016 through 2021 HCUP State Inpatient Databases … the discharge disposition indicates that 
the patient died at the hospital. … • Denominator of inpatient stays with non-missing, valid discharge disposition with HAIs for the same … given 
year, MDC, and COVID-19 status with any hospital discharge status.
                                     
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hcup-us.ahrq.gov/db/state/siddist/siddist_filecompsd.jsp
August 01, 2012 - HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … SID File Composition - South Dakota 
 
   
 
 SID Notes 
 Source Files 
 
		The HCUP South Dakota inpatient … files were constructed from confidential hospital discharge files received from the South Dakota Association … Exclusion of Records During HCUP Data Processing 
 
			Records with a discharge disposition of "still … a patient" and "admitted as an inpatient" were excluded from the HCUP South Dakota inpatient data.
                                     
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hcup-us.ahrq.gov/db/vars/samedayevent/nrdnote.jsp
August 01, 2015 - Reports & Publications 
 
 
 Data Visualizations 
 
 
 Data Query Tools 
 
 
 Home 
 
 
 About … Reports Archive 
 
 
 
 
 
 
 
 DATA VISUALIZATIONS 
 
 
 
 
 
 DATA QUERY TOOLS … first inpatient stay equaled the admission date of a subsequent inpatient stay. … The first record had a discharge disposition of transfer to an acute care hospital. … Pairs of discharges are classified as a same-day stay if the discharge date for one inpatient stay was
                                     
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hcup-us.ahrq.gov/db/nation/kid/reports/KID_2000_Design_Report.pdf
January 01, 2000 - Weight Data Elements 
 
In addition to the regular discharge weight data element, DISCWT, the 2000 KID … contains a new 
discharge weight data element named DISCWTCHARGE. … If an AHA hospital could not be matched to the discharge data provided by the data 
source, it was eliminated … Weight Data Elements 
In addition to the regular discharge weight data element, DISCWT, the 2000 KID … contains a new 
discharge weight data element named DISCWTCHARGE.
                                     
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hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1998_Design_Report.pdf
January 01, 1998 - Discharge outcomes of 
interest include trends in inpatient treatments with respect to: 
 
• frequency … Two sources for all-payer discharge data were state agencies and 
private data organizations, primarily … If an AHA community 
hospital could not be matched to the discharge data provided by the data source, … discharge data that agreed to provide such data to the 
project. … Calculating Variances Using Data from the HCUP 
Nationwide Inpatient Sample.
                                     
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hcup-us.ahrq.gov/db/state/siddist/siddist_filecompmn.jsp
November 01, 2016 - HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … files were constructed from hospital discharge files received from the Minnesota Hospital Association … Types of Facilities Included in the Files Provided to HCUP by the Partner 
 
		MHA collects inpatient … Exclusion of Records During HCUP Data Processing 
 
			Records with a discharge disposition of "still … a patient" and "admitted as an inpatient" were excluded from the HCUP Minnesota inpatient data.
                                     
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hcup-us.ahrq.gov/db/state/siddist/siddist_filecompwv.jsp
August 01, 2006 - HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … files were constructed from inpatient discharge files received from the West Virginia Health Care Authority … Exclusion of Records During HCUP Data Processing 
 
			Records with a discharge disposition of "still … a patient" and "admitted as an inpatient to this hospital" were excluded from the HCUP West Virginia … inpatient data.
                                     
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hcup-us.ahrq.gov/db/state/siddist/siddist_filecompma.jsp
August 01, 2006 - HCUP Supplemental Files 
 NIS-Trend Weights Files 
 NIS Hospital Ownership Files 
 NIS 1993-2002 Discharge-Level … Types of Facilities Included in the Files Provided to HCUP by the Partner 
 
		Massachusetts supplied discharge … abstract data for inpatient stays from general acute care hospitals in Massachusetts. … Exclusion of Records During HCUP Data Processing 
 
			Records with a discharge disposition of "still … a patient" and "admitted as an inpatient" were excluded from the HCUP Massachusetts inpatient data.
                                     
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hcup-us.ahrq.gov/db/nation/kid/Availability_of_KID_Data_Elements_2009.pdf
January 01, 2009 - Availability of Data Elements in the 1997, 2000, 2003, 2006, and 2009 Kids' Inpatient Database (KID) … Availability of Data Elements in the 1997, 2000, 2003, 2006, and 2009 Kids' Inpatient Database (KID) … Availability of Data Elements in the 1997, 2000, 2003, 2006, and 2009 Kids' Inpatient Database (KID) … Availability of Data Elements in the 1997, 2000, 2003, 2006, and 2009 Kids' Inpatient Database (KID) … Availability of Data Elements in the 1997, 2000, 2003, 2006, and 2009 Kids' Inpatient Database (KID)
                                     
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hcup-us.ahrq.gov/db/vars/ndx/nisnote.jsp
September 01, 2008 - Reports & Publications 
 
 
 Data Visualizations 
 
 
 Data Query Tools 
 
 
 Home 
 
 
 About … NIS Description of Data Elements 
 
   
 
 
 
 NDX - Number of ICD-9-CM diagnoses on this discharge … A maximum of 15 diagnoses has been retained on a NIS inpatient record. … If an inpatient record from these states had more than 15 non-missing diagnoses, diagnoses in positions … of diagnoses available on the inpatient record, caution needs to be taken when using NDX to loop through