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AHRQ: Agency for Healthcare Research and Quality
HEALTHCARE COST & UTILIZATION PROJECT

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KID Description of Data Elements

The following links provide data elements descriptions for the Kids' Inpatient Database (KID).

Data element descriptions explain how the data element is coded in the HCUP databases and what are the uniform values. The descriptions are cumulative across all years of KID data from 1997 to the current data year. Please note the following:

  • Not all data elements in the KID are uniformly coded across States. Please check the "State Specific Notes" section for each data element before analysis.
  • Not all data elements in the KID are available from every State.
  • Not all data elements are available each year.

For a description of how HCUP data elements are coded, restriction on use, uniform values, and state-specific coding practices, check the corresponding boxes below and then click the "View Description of Data Elements"
Check the corresponding boxes and then click

Abbreviations: DX, diagnosis; PR, procedure; Q1, discharge quarter 1; Q3, discharge quarter 3; Q4, discharge quarter 4.

HCUP Data Element Descriptive Title Years File(s)
Data elements change frequently, and are only current as of the date generated.
1997 Core
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
1997, 2000, 2003, 2006, 2009 Core
1997, 2000, 2003, 2006, 2009 Core
2012, 2016, 2019, 2022 Core
2000, 2003, 2006, 2009 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
2003, 2006, 2009, 2012, 2016, 2019, 2022 Severity
2003, 2006, 2009, 2012, 2016, 2019, 2022 Severity
2003, 2006, 2009, 2012, 2016, 2019, 2022 Severity
2003, 2006, 2009 Severity
2003, 2006, 2009 Severity
2003, 2006, 2009 Severity
2003, 2006, 2009 Severity
1997, 2000, 2003, 2006, 2009 Core
2000, 2003, 2006, 2009 Core
2003, 2006, 2009 Core
1997, 2000, 2003, 2006, 2009 Core
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
2000, 2003, 2006, 2009 Core
2006 DX_PR_Grps
2006 DX_PR_Grps
2000 Hospital
2000 Hospital
1997 Hospital
2006, 2009, 2012 DX_PR_Grps
2006, 2009, 2012 DX_PR_Grps
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2003, 2006, 2009, 2012 Severity
2000 Hospital
1997 Hospital
2000 Hospital
1997 Core
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
1997 Core, Hospital
2000 Core
1997 Core
2009 Core
2003, 2006, 2009 Core
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
2006, 2009 Core
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
2009, 2012, 2016, 2019, 2022 Core
1997 Core
2000, 2003 Core
2006, 2009, 2012 Core
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
2003, 2006, 2009 Severity
2003, 2006 Severity
2003, 2006 Severity
2003, 2006 Severity
2003, 2006 Severity
2003, 2006 Severity
2003, 2006 Severity
2003, 2006, 2009 Severity
2000, 2003, 2006, 2009 Core
2000, 2003, 2006, 2009, 2012 Core
2009,2012 DX_PR_Grps
1997, 2000, 2003, 2006, 2009, 2012 Core
2019, 2022 DX_PR_GRPS
2019, 2022 DX_PR_GRPS
2019, 2022 DX_PR_GRPS
2016 Core
1997 Core
2003, 2006, 2009, 2012 Core
2009, 2012 DX_PR_Grps
2006 DX_PR_Grps
2003, 2006, 2009, 2012 Core
2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
1997 Hospital
1997, 2000 Hospital
1997, 2000 Hospital
1997, 2000 Hospital
1997, 2009, 2012, 2016, 2019, 2022 Hospital
1997, 2000 Hospital
1997, 2000 Hospital
1997 Hospital
1997 Hospital
1997 Hospital
1997 Hospital
1997, 2000 Hospital
2009, 2012, 2016, 2019, 2022 Core
2006, 2009 Hospital
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
2000, 2003, 2006, 2009 Hospital
2012 Hospital
2012, 2016, 2019, 2022 Core, Hospital, Severity, DX_PR_Grps
2000, 2003, 2006, 2009 Hospital
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
2009 Hospital
2009 Hospital
2009 Hospital
2009 Hospital
2009 Hospital
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core (beginning in 2012), Hospital
2009 Hospital
2009 Hospital
2000, 2003, 2006, 2009 Hospital
2000, 2003, 2006, 2009 Hospital
1997, 2000, 2003, 2006, 2009, 2012 Core
2000, 2003, 2006, 2009 Hospital
2000, 2003, 2006, 2009 Core, Hospital, Severity, DX_PR_Grps
2000, 2003, 2006, 2009 Hospital
1997 Core, Hospital
2000, 2003, 2006, 2009 Core, Hospital
2000, 2003, 2006, 2009 Core (2000), Hospital (2003, 2006, 2009)
2000, 2003, 2006, 2009 Hospital
2019, 2022 Core
2019, 2022 Core
2016, 2019, 2022 Core
2016 Core
2016, 2019, 2022 Core
2019, 2022 Core
2019, 2022 Core
2016, 2019, 2022 Core
2016 Core
2016, 2019, 2022 Core
2016, 2019, 2022 Core
2019, 2022 Core
2016, 2019, 2022 Core
2000, 2003, 2006, 2009 Hospital
2000 Core, Severity
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core, Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
1997, 2000, 2003, 2006, 2009 Core
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
2009, 2012, 2016, 2019, 2022 Core
1997 Core
2000, 2003 Core
2006, 2009, 2012 Core
1997, 2000 Core
2003, 2006, 2009 Core
2003, 2006, 2009 Core
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
1997, 2000, 2003, 2006, 2009 Hospital
2009, 2012 Core
1997, 2000, 2003, 2006, 2009, 2012 Core
2003, 2006, 2009, 2012 Core
1997, 2000, 2003, 2006, 2009, 2012 Core
1997, 2000, 2003, 2006, 2009, 2012 Core
2009, 2012 Core
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
1997 Core
2000, 2003, 2006, 2009 Core
1997, 2000, 2003, 2006, 2009 Core
1997 Core
2000, 2003, 2006, 2009 Core
1997 Core
2006, 2009, 2012, 2019, 2022 DX_PR_Grps
2019, 2022 DX_PR_Grps
2019, 2022 Core
2000, 2003, 2006, 2009 Hospital
2000, 2003, 2006, 2009 Hospital
2006, 2009, 2012, 2016, 2019, 2022 Core
2003 Core
2009 Core
2009 Core
1997, 2000, 2003, 2006, 2009, 2012 Core
2000, 2003, 2006, 2009, 2012 Core
2019, 2022 DX_PR_GRPS
2019, 2022 DX_PR_GRPS
2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
2009, 2012 DX_PR_Grps
1997 Core
2016 Core
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
1997, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core, Severity, DX_PR_Grps
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
1997, 2000 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
1997, 2000 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
1997, 2000 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Hospital
1997 Core
1997 Hospital
1997, 2000 Core
2000, 2003, 2006, 2009 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
1997, 2000, 2003, 2006, 2009 Core
1997 Hospital
2009, 2012, 2016, 2019, 2022 Core
2012, 2016, 2019, 2022 Core
1997, 2000, 2003, 2006, 2009, 2012 Core
2000 Hospital
2000 Hospital
1997 Hospital
1997, 2000, 2003, 2006, 2009, 2012, 2016, 2019, 2022 Core, Hospital
2000 Core
2003, 2006, 2009, 2012, 2016, 2019, 2022 Core
1997 Core

Abbreviations: DX, diagnosis; PR, procedure; Q1, discharge quarter 1; Q3, discharge quarter 3; Q4, discharge quarter 4.

Check the corresponding boxes and then click
Internet Citation: KID Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). March 2025. Agency for Healthcare Research and Quality, Rockville, MD. hcup-us.ahrq.gov/db/nation/kid/kiddde.jsp.
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Last modified 3/5/25