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Central Distributor SID: Description of Data Elements

PCCHPRn - Clinical Classifications Software: procedure classification
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

Clinical Classifications Software (CCS), formerly known as Clinical Classifications for Health Policy Research (CCHPR), consists of 231 procedure categories. This system is based on ICD-9-CM codes. All procedure codes are classified.

PCCHPRn is coded as follows:

  • PCCHPRn ranges from 1 to 231 if the procedure code (PRn) is valid by the HCUP criteria, which allows a six-month window (three months before and three months after) around the official ICD-9-CM coding changes (usually October 1), for anticipation of or lags in response to official ICD-9-CM coding changes.
  • PCCHPRn is missing (.), if there is no procedure code (PRn = "").
  • PCCHPRn is set to invalid (.A), if the procedure code (PRn) is invalid (PRVn = 1).
  • PCCHPRn is retained (values 1-231) when a valid procedure is flagged as inconsistent with age or sex (PRVn = .C). For best results, use PCCHPRn only when the procedure is valid and consistent (PRVn = 0).

Beginning in the 1998 data, this data element is called PRCCSn.


Labels for CCS, formerly known as CCHPR, categories are provided as an ASCII file in HCUP Tools: Labels and Formats.


Formats for CCS, formerly known as CCHPR, categories are provided in HCUP Tools: Labels and Formats.

A format is also available to map CCS codes into a few broad classes of conditions based on ICD-9-CM chapters. These formats are also provided in HCUP Tools: Labels and Formats.

Uniform Values
VariableDescriptionValueValue Description
PCCHPRnClinical Classifications Software: procedure classification1 - 231CCS procedure class
.No procedure code
.AInvalid procedure code
State Specific Notes



Internet Citation: HCUP Central Distributor SID Description of Data Elements - All States. Healthcare Cost and Utilization Project (HCUP). August 2008. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 8/12/08