User Support

Do Your own analysis
Explore Expert Research & Limited Datasets

NEDS Description of Data Elements

PRCCS_EDn - Clinical Classifications Software (CCS): procedure classification
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

Clinical Classifications Software (CCS) consists of 231 procedure categories. This system is clinically based on ICD-9-CM codes. All procedure codes are classified.

PRCCS_EDn is coded as follows:

  • 1 to 231 if the procedure code (PR_EDn) is valid by the HCUP criteria. The HCUP criteria for procedure validation allows a year window (six months before and six 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.
  • PRCCS_EDn is missing (.), if there is no procedure code (PR_EDn = " ").
  • PRCCS_EDn is set to invalid (.A), if the procedure code (PR_EDn) is invalid by the HCUP criteria.
  • PRCCS_EDn is set to inconsistent (.C), if the procedure code (PR_EDn) is inconsistent with age or sex of the patient.

Labels and formats for CCS categories are provided as an ASCII file in HCUP Tools: Labels and Formats.

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

Internet Citation: HCUP NEDS Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). May 2015. Agency for Healthcare Research and Quality, Rockville, MD.
Are you having problems viewing or printing pages on this website?
If you have comments, suggestions, and/or questions, please contact
Privacy Notice, Viewers & Players
Last modified 5/8/15