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Procedure codes are numbers or alphanumeric codes used to identify specific health interventions taken by medical professionals.
Examples of procedure codes
- International Classification of Procedures in Medicine (ICPM) and International Classification of Health Interventions (ICHI) 
- ICPC-2 (International Classification of Primary Care, which doe not diagnosis codes, reasons for encounter (RFE), and process of care as well as procedure codes)
- Health Care Procedure Coding System (including Current Procedural Terminology) (used in United States)
- ICD-10 Procedure Coding System (ICD-10-PCS) (used in United States)
- ICD-9-CM Volume 3 (subset of ICD-9-CM) (used in United States)
- Canadian Classification of Health Interventions (CCI) (used in Canada. Replaced CCP.) 
- Nursing Interventions Classification (NIC) (used in United States) 
- SNOMED (P axis)(english only, translations available but not useful)
- OPS-301 (adaptation of ICPM used in Germany) 
- OPCS-4.2 (used in England) 
- OPCS-4.3 (used in England) 
- Classification des Actes Médicaux (CCAM) (used in France)