-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2015_Core.TXT
January 01, 2015 - Data Set Name: NIS_2015_CORE
Number of Observations: 7153989
Total Record Length: 86
Total Number of Data Elements: 24
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…
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_1999_HOSPITALv2.TXT
January 01, 1999 - Data Set Name: NIS_1999_HOSPITAL
Number of Observations: 984
Total Record Length: 173
Total Number of Variables: 23
Columns Description:
======= ============
1- 3 Database name
5- 8 Discharge year of data
10- 17 File name
19- 21 Variable number
23- 41 Variable name
4…
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_1999_HOSPITAL.TXT
January 01, 1999 - Data Set Name: NIS_1999_HOSPITAL
Number of Observations: 984
Total Record Length: 173
Total Number of Variables: 23
Columns Description:
======= ============
1- 3 Database name
5- 8 Discharge year of data
10- 17 File name
19- 21 Variable number
23- 41 Variable name
4…
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2003_HOSPITAL.TXT
January 01, 2003 - Data Set Name: NIS_2003_HOSPITAL
Number of Observations: 994
Total Record Length: 178
Total Number of Variables: 24
Columns Description:
======= ============
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Variable number
31- 59 Variable name
61- 63 Star…
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2002_HOSPITAL.TXT
January 01, 2002 - Data Set Name: NIS_2002_HOSPITAL
Number of Observations: 995
Total Record Length: 178
Total Number of Variables: 24
Columns Description:
======= ============
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Variable number
31- 49 Variable name
51- 53 Star…
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_1998_HOSPITAL.TXT
January 01, 1998 - Data Set Name: NIS_1998_HOSPITAL
Number of Observations: 984
Total Record Length: 173
Total Number of Variables: 23
Columns Description:
======= ============
1- 3 Database name
5- 8 Discharge year of data
10-17 File name
19-21 Variable number
23-41 Variable name
4…
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2001_HOSPITAL.TXT
January 01, 2001 - Data Set Name: NIS_2001_HOSPITAL
Number of Observations: 986
Total Record Length: 173
Total Number of Variables: 23
Columns Description:
======= ============
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Variable number
31- 49 Variable name
5…
-
hcup-us.ahrq.gov/db/nation/nrd/NRD_Introduction_2010-2014.jsp
January 01, 2014 - Admissions (NRD_DaysToEvent and LOS)
NRD_DaysToEvent is the number of days from a randomly chosen "start … Each verified patient linkage number (NRD_VisitLink) was assigned a unique start date that was used to … The data element NRD_DaysToEvent was the difference between the visit's admission date and the start … For readmission analyses, determining the number of days between the end of one admission and the start … The number of days between the admissions (from discharge date of the first admission to the start
-
hcup-us.ahrq.gov/news/exhibit_booth/HCUPOverviewDeck_121422.pdf
February 09, 2022 - Description
Number of categories More than 530 CCSR categories
Category naming convention
Categories start … Description
Number of categories More than 320 CCSR categories
Category naming convention
Categories start
-
hcup-us.ahrq.gov/db/state/siddist/siddist_filecompnd.jsp
August 01, 2025 - SID File Composition - North Dakota
An official website of the Department of Health & Human Services
Search All AHRQ Websites
Careers
Contact Us
Espanol
FAQs
Email Updates
…
-
hcup-us.ahrq.gov/db/state/siddist/siddist_filecompde.jsp
June 01, 2024 - SID File Composition - Delaware
An official website of the Department of Health & Human Services
Search All AHRQ Websites
Careers
Contact Us
Espanol
FAQs
Email Updates
…
-
hcup-us.ahrq.gov/db/nation/nass/nasscorrections_2022.jsp
January 01, 2022 - 2021 NASS Known Data Issues
An official website of the Department of Health & Human Services
Search All AHRQ Websites
Careers
Contact Us
Espanol
FAQs
Email Updates
…
-
hcup-us.ahrq.gov/db/nation/neds/nedscorrections_2022.jsp
January 01, 2022 - 2022 NEDS Known Data Issues
An official website of the Department of Health & Human Services
Search All AHRQ Websites
Careers
Contact Us
Espanol
FAQs
Email Updates
…
-
hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2016.pdf
January 01, 2016 - Admissions (NRD_DaysToEvent and LOS)
NRD_DaysToEvent is the number of days from a randomly chosen "start … Each verified patient linkage number (NRD_VisitLink) was assigned a unique start date that was
used … The data element NRD_DaysToEvent was the difference between the visit’s admission date
and the start … For readmission analyses, determining the number of days between the end of one admission
and the start … • The number of days between the admissions (from discharge date of the first admission
to the start
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2006_Hospital.TXT
January 01, 2006 - Data Set Name: NIS_2006_HOSPITAL
Number of Observations: 1045
Total Record Length: 185
Total Number of Data Elements: 25
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-…
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2005_Hospital.TXT
January 01, 2005 - Data Set Name: NIS_2005_HOSPITAL
Number of Observations: 1054
Total Record Length: 185
Total Number of Data Elements: 25
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…
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2000_HOSPITAL.TXT
January 01, 2000 - Data Set Name: NIS_2000_HOSPITAL
Number of Observations: 994
Total Record Length: 183
Total Number of Variables: 24
Columns Description:
======= ============
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Variable number
31- 49 Variable name
5…
-
hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2004_HOSPITAL.TXT
January 01, 2004 - Data Set Name: NIS_2004_HOSPITAL
Number of Observations: 1004
Total Record Length: 185
Total Number of Variables: 25
Columns Description:
======= ============
1- 3 Database name
5- 8 Discharge year of data
10- 25 File name
27- 29 Variable number
31- 59 Variable name
61- 63 Sta…
-
hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2018.jsp
January 01, 2018 - discharge would be selected from the sorted list of discharges, beginning with a randomly selected start
-
hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2019.jsp
January 01, 2019 - discharge would be selected from the sorted list of discharges, beginning with a randomly selected start