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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2015Q1Q3_Severity.TXT
November 09, 2017 - Data Set Name: NIS_2015Q1Q3_SEVERITY
Number of Observations: 5377720
Total Record Length: 81
Total Number of Data Elements: 34
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 35 File name
37- 39 Data element number
41- 69 Data element name
7…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2013_Severity.TXT
January 01, 2013 - Data Set Name: NIS_2013_SEVERITY
Number of Observations: 7119563
Total Record Length: 81
Total Number of Data Elements: 34
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
6…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2012_Severity.TXT
January 01, 2012 - Data Set Name: NIS_2012_SEVERITY
Number of Observations: 7296968
Total Record Length: 81
Total Number of Data Elements: 34
Columns Description
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1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
6…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2014_Severity.TXT
January 01, 2014 - Data Set Name: NIS_2014_SEVERITY
Number of Observations: 7071762
Total Record Length: 81
Total Number of Data Elements: 34
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
6…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2011_Severity.TXT
January 01, 2011 - Data Set Name: NIS_2011_SEVERITY
Number of Observations: 8023590
Total Record Length: 86
Total Number of Data Elements: 34
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data el…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2010_Severity.TXT
January 01, 2010 - Data Set Name: NIS_2010_SEVERITY
Number of Observations: 7800441
Total Record Length: 95
Total Number of Data Elements: 36
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
6…
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hcup-us.ahrq.gov/db/nation/kid/tools/stats/FileSpecifications_KID_2009_Hospital.TXT
January 01, 2009 - Data Set Name: KID_2009_HOSPITAL
Number of Observations: 4121
Total Record Length: 323
Total Number of Data Elements: 39
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
61-…
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hcup-us.ahrq.gov/db/nation/kid/tools/stats/FileSpecifications_KID_2012_Severity.TXT
January 01, 2012 - Data Set Name: KID_2012_SEVERITY
Number of Observations: 3195782
Total Record Length: 79
Total Number of Data Elements: 34
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
6…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_1999_Supplemental.TXT
January 01, 1999 - Data Set Name: NIS_1999_SUPPLEMENTAL
Number of Observations: 7198929
Total Record Length: 223
Total Number of Data Elements: 46
Columns Description
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1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_1998_Supplemental.TXT
January 01, 1998 - Data Set Name: NIS_1998_SUPPLEMENTAL
Number of Observations: 6827350
Total Record Length: 223
Total Number of Data Elements: 46
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2001_Supplemental.TXT
January 01, 2001 - Data Set Name: NIS_2001_SUPPLEMENTAL
Number of Observations: 7452727
Total Record Length: 191
Total Number of Data Elements: 44
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2002_Supplemental.TXT
January 01, 2002 - Data Set Name: NIS_2002_SUPPLEMENTAL
Number of Observations: 7853982
Total Record Length: 189
Total Number of Data Elements: 43
Columns Description
======= ===========
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Data element number
31- 59 Data element name
…
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hcup-us.ahrq.gov/spssload/spssload_search.jsp
August 01, 2025 - HCUP-US Central Distributor SPSS Load Programs
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hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2016.jsp
January 01, 2016 - THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2016
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hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2015.jsp
January 01, 2015 - discharge would be selected from the sorted list of discharges, beginning with a randomly selected start
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hcup-us.ahrq.gov/tech_assist/trends/508/508course_2019.jsp
January 01, 2019 - elements
Return to Contents
Changes to Nationwide Database Design and Weights
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hcup-us.ahrq.gov/db/nation/nis/nischecklist.jsp
November 01, 2024 - Checklist for Working with the NIS
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hcup-us.ahrq.gov/datainnovations/raceethnicitytoolkit/or19.jsp
July 01, 2014 - Comparisons subsequently made only within blocks
Discard very unlikely record-pairings from the start
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hcup-us.ahrq.gov/db/vars/cmr_aaa/nassnote.jsp
August 01, 2019 - Healthcare Cost and Utilization Project (HCUP) NASS Notes
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hcup-us.ahrq.gov/toolssoftware/ccsr/DXCCSR-User-Guide-v2019-1.pdf
September 01, 2019 - The number of catch-all categories (those that start with “Other specified”) are
minimized, because