The Procedure Classes provide users an easy way to categorize ICD-9-CM procedure codes into one of four broad categories:
- Minor Diagnostic: Non-operating room procedures that are diagnostic (e.g., 87.03 CT scan of head)
- Minor Therapeutic - Non-operating room procedures that are therapeutic (e.g., 02.41 Irrigate ventricular shunt)
- Major Diagnostic - All procedures considered valid operating room procedures by the Diagnosis Related Group (DRG) grouper and that are performed for diagnostic reasons (e.g., 01.14 Open brain biopsy)
- Major Therapeutic - All procedures considered valid operating room procedures by the Diagnosis Related Group (DRG) grouper and that are performed for therapeutic reasons (e.g., 39.24 Aorta-renal bypass).
More information on the Procedure Class is available under Tools & Software on the HCUP-US Web site.
For data beginning in the fourth quarter of 2015, the procedure class is stored in the data element I10_PRCLASSn to indicate the implementation of the ICD-10-CM/PCS coding system.