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hcup-us.ahrq.gov/db/nation/nis/NIS_2008_INTRODUCTION.pdf
January 01, 2008 - 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 … CD-ROM #1 contains: 
 
Inpatient Core File: This inpatient discharge-level file contains data for all … Summary of NIS Data Sources, Hospitals, and Inpatient Stays, 1988-2008 
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/FinalReportonObservationStatus_v2Final.pdf
January 01, 2010 - is misleading 
because hospitals were instructed to omit observation cases subsequently admitted as 
inpatients … Frequency of Observation Services in HCUP Inpatient Data 
For each of the five State Inpatient Databases … observation services as a percent of inpatient discharges by discharge quarter 
within State and hospital … Variation in the use of observation status prior to admission of inpatients 
was quite large across hospitals … Data 
We examined whether the length of stay coded on the discharge record included the 
number of
                                     
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hcup-us.ahrq.gov/reports/projections/2016-01.pdf
January 01, 2016 - Using the HCUP SID from 2005 to 2014 and 
early 2015 data from 17 States, different outcomes for inpatient … Discharge 
counts exclude inpatient stays that were transferred out to another acute care hospital. … Using the 
HCUP SID from 2005 to 2014 and early 2015 data from 17 States, different outcomes for 
inpatient … 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/nrd/Introduction_NRD_2010-2014.pdf
January 01, 2014 - ” files, meaning that 
each record represents one discharge abstract from an inpatient stay. …  Limitations from Using One Year of Discharge Data: The NRD is an annual file 
containing inpatient … dates to discharge 
month (data element DMONTH) and discharge year (data element YEAR). … ” files, meaning that 
each record represents one discharge abstract from an inpatient stay. … We defined a discharge as a same-day stay if the discharge date for one inpatient stay was the 
same
                                     
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hcup-us.ahrq.gov/db/state/sasddist/sasddist_filecompca.jsp
July 01, 2010 - The facility is not listed in the AHA database, but the facility provides inpatient discharge data to … The facility is not listed in the AHA database, but the facility provides inpatient discharge data to … Exclusion of Records During HCUP Data Processing 
 Beginning with 2016 data, records with a discharge … Beginning in 2010, records with a designation of "admitted as an inpatient" are retained in the SASD, … Prior to 2010, records with a designation of "admitted as an inpatient" were excluded from the files.
                                     
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hcup-us.ahrq.gov/datainnovations/clinicaldata/ExampleofUsingPOA-CMSHACsusingall-payerdata.jsp
August 01, 2011 - admission (POA) data in their all-payer hospital discharge data since the data element was added to … This document applies the CMS HAC algorithm to statewide discharge all-payer data that consistently collect … The analysis used data from the HCUP 2008 State Inpatient Databases (SID) for 15 states:  Arkansas, Arizona … The SID contains the universe of the inpatient discharge abstracts in the states, translated into a uniform … Payer-specific discharge rate relative to Medicare.
                                     
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hcup-us.ahrq.gov/reports/statbriefs/sb194-Inpatient-Mortality-High-Volume-Conditions.pdf
November 01, 2014 - Death following discharge from a hospital is not 
reflected in these data. … For data year 2012, we used an analysis 
file derived from the HCUP State Inpatient Databases (SID) that … ) Inpatient Sample (NIS) is based on data from community hospitals, which are 
defined as short-term, … Unit of analysis 
The unit of analysis is the hospital discharge (i.e., the hospital stay), not a person … HCUP 
databases bring together the data collection efforts of State data organizations, hospital associations
                                     
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hcup-us.ahrq.gov/reports/natstats/his96/table1b.htm
January 01, 1996 - Hospital Inpatient Statistics, 1996 
 
 
 
 
 Table 1 (continued). … Statistics for 
1996 HCUP Nationwide Inpatient Sample, by multi-level CCS diagnosis (principal 
diagnosis … _____________________________________________________________________
(NOTE: This table includes 10 data … Nationwide Inpatient Sample. … Return to Hospital 
Inpatient Statistics 1996 Return to 
Contents for Table 1 Proceed to Category 
9
                                     
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hcup-us.ahrq.gov/db/nation/nis/NIS_2007_INTRODUCTION.pdf
January 01, 2007 - 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 … Core File: This inpatient discharge-level file contains data for 100% of the 
discharges from a sample … Summary of NIS Data Sources, Hospitals, and Inpatient Stays, 1988-2007 
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/db/nation/nrd/Introduction_NRD_2010-2015.pdf
January 01, 2015 - ” files, meaning that 
each record represents one discharge abstract from an inpatient stay. … outpatient data 
• ICD-10-PCS: procedure coding on inpatient data. … • Limitations from Using One Year of Discharge Data: The NRD is an annual file 
containing inpatient … dates to discharge month (data element DMONTH) and discharge year 
(data element YEAR). … We defined a discharge as a same-day stay if the discharge date for one inpatient stay was the 
same
                                     
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hcup-us.ahrq.gov/reports/methods/2005_06.pdf
January 01, 2005 - discharge-level health care data. … The HCUP data were used for discharge 
denominator counts for QIs that related to providers. … Discharge Data Set (UHDDS) and the Uniform 
Bill (UB-92) formats. … Provider-based QIs using Weighted Discharge Data (Disparities Analysis File) 
 
a. … Standard error estimates for inpatient rates per 1,000 discharges using discharge 
counts in both the
                                     
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hcup-us.ahrq.gov/reports/statbriefs/sb176-Hospital-Cost-Projections-by-Age-2013.pdf
January 01, 2013 - Databases (SID), 2003–2011, and early State discharge data, 2012 
 
  
3 
 
■ Aggregate hospital … Databases (SID), 2003–2011, and early State discharge data, 2012 
 
■ Among patients aged 0–17 years … Databases (SID), 2003–2011, and early State discharge data, 2012 
 
■ Among adults aged 18–64 years … 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,
                                     
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hcup-us.ahrq.gov/reports/factsandfigures/2008/pdfs/section5_12.pdf
January 01, 2008 - The latest available HCUP data on emergency department (ED) visits is for 2007, one year earlier than … the most 
current data for inpatient stays …  An all-listed MH diagnosis appeared in discharge records for 8.1 percent of all ED visits (9.9 … rc
e
n
t D
is
tr
ib
u
ti
o
n
Distribution of All-listed† Emergency Department (ED) Visits 
by Discharge … The discharge status of ED visits involving MHSA conditions varied by specific condition.
                                     
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hcup-us.ahrq.gov/reports/methods/2014-04.pdf
January 01, 2014 - The frame is limited by the availability of inpatient data from the data sources currently 
participating … 2010 Data 2011 Data 
Exclude LTAC Hospitals 
Use AHA 
Discharge 
Counts Use SID Discharge Counts … 2010 Data 2011 Data 
Exclude LTAC Hospitals 
Use AHA 
Discharge 
Counts 
Use SID Discharge 
Counts … 2010 Data 2011 Data 
Exclude LTAC Hospitals 
Use AHA 
Discharge 
Counts Use SID Discharge Counts … 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/db/vars/seq/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 … Reports Archive 
 
 
 
 
 
 
 
 DATA VISUALIZATIONS 
 
 
 
 
 
 DATA QUERY TOOLS … Notes 
 
 
 
 
 General Notes 
 
   
 
 
 
 Sequence number (SEQ) is a unique number assigned to each discharge … Beginning in the 1998 data, the data element KEY is used instead of SEQ on all HCUP databases.
                                     
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hcup-us.ahrq.gov/reports/methods/2004-05.pdf
January 01, 2004 - discharge-level health care data. … The HCUP data were used for discharge 
denominator counts for QIs that related to providers. … Discharge Data Set (UHDDS) and the Uniform 
Bill (UB-92) formats. … Provider-based QIs using Weighted Discharge Data (Disparities Analysis File) 
 
a. … Standard error estimates for inpatient rates per 1,000 discharges using discharge 
counts in both the
                                     
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hcup-us.ahrq.gov/reports/methods/2006_8.pdf
January 01, 2006 - discharge-level health care data. … The HCUP data were used for discharge 
denominator counts for QIs that related to providers. … Discharge Data Set (UHDDS) and the Uniform 
 5
Bill (UB-92) formats. … Provider-based QIs using Weighted Discharge Data (Disparities Analysis File) 
 
a. … Standard error estimates for inpatient rates per 1,000 discharges using discharge 
counts in both the
                                     
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hcup-us.ahrq.gov/reports/statbriefs/sb81.pdf
April 01, 2010 - The inpatient death rate was 3.6 percent among Medicare inpatients, the highest among all payer groups … Inpatients aged 65–84 had the second highest death rate (3.5 percent), while 
inpatients aged 1–17 had … Inpatients with a median ZIP Code household income below $39,000 accounted for 30 percent of all inpatient … Discharge status 
Discharge status indicates the disposition of the patient at discharge from the hospital … Cost Per 
Discharge 
Inpatient 
Death Rate 
CCS Principal Diagnoses    
Septicemia (except in labor
                                     
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hcup-us.ahrq.gov/reports/factsandfigures/2009/exhibit1_4.jsp
January 01, 2009 - Reports & Publications 
 
 
 Data Visualizations 
 
 
 Data Query Tools 
 
 
 Home 
 
 
 About … Reports Archive 
 
 
 
 
 
 
 
 DATA VISUALIZATIONS 
 
 
 
 
 
 DATA QUERY TOOLS … Center for Delivery, Organization, and Markets, Healthcare Cost and Utilization Project, Nationwide Inpatient … Center for Delivery, Organization, and Markets, Healthcare Cost and Utilization Project, Nationwide Inpatient … Center for Delivery, Organization, and Markets, Healthcare Cost and Utilization Project, 
Nationwide Inpatient
                                     
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hcup-us.ahrq.gov/reports/statbriefs/sb118.jsp
August 01, 2011 - From: https://www.census.gov/programs-surveys/popest/data/data-sets.html. … From:  https://www.census.gov/programs-surveys/popest/data/data-sets.html . … data from HCUP's Kids' Inpatient Database (KID) for 2009, 2006, and 2000 and the Nationwide Inpatient … Discharge status 
Discharge status indicates the disposition of the patient at discharge from the hospital … HCUPnet generates statistics using data from HCUP's Nationwide Inpatient Sample (NIS), the Kids' Inpatient