International

• International Classification of Procedures in Medicine (ICPM) and International Classification of Health Interventions
  International Classification of Health Interventions
  The International Classification of Health Interventions is a system of classifying procedure codes being developed by the World Health Organization...
  
   (ICHI)
• ICPC-2 (International Classification of Primary Care
  International Classification of Primary Care
  The International Classification of Primary Care is a classification method for primary care encounters. It allows for the classification of the patient’s reason for encounter , the problems/diagnosis managed, primary or general health care interventions, and the ordering of the data of the...
  
  , which contains diagnosis codes, reasons for encounter (RFE), and process of care as well as procedure codes)

North American

• Healthcare Common Procedure Coding System
  Healthcare Common Procedure Coding System
  The Healthcare Common Procedure Coding System is a set of health care procedure codes based on the American Medical Association's Current Procedural Terminology .-History:...
  
   (including Current Procedural Terminology
  Current Procedural Terminology
  The Current Procedural Terminology code set is maintained by the American Medical Association through the CPT Editorial Panel. The CPT code set describes medical, surgical, and diagnostic services and is designed to communicate uniform information about medical services and procedures among...
  
  ) (used in United States)
• ICD-10 Procedure Coding System
  ICD-10 Procedure Coding System
  The ICD-10 Procedure Coding System is an American system of medical classification used for procedural codes. The National Center for Health Statistics received permission from the World Health Organization to create the ICD-10-PCS as a successor to Volume 3 of ICD-9-CM and a...
  
   (ICD-10-PCS) (used in United States)
• ICD-9-CM Volume 3
  ICD-9-CM Volume 3
  ICD-9-CM Volume 3 is a system of procedural codes. It is a subset of ICD-9-CM - Procedures and interventions, not elsewhere classified :* Procedures and interventions, not elsewhere classified...
  
   (subset of ICD-9-CM
  ICD
  The International Statistical Classification of Diseases and Related Health Problems is a medical classification that provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or disease...
  
  ) (used in United States)
• Canadian Classification of Health Interventions
  Canadian Classification of Health Interventions
  The Canadian Classification of Health Interventions is a system of procedure codes used in Canada.-External link:* http://www.hcaiinfo.ca/Health_Care_Facility_Provider/documents/appendices/CCI_Vol4_2006%20Alpha%20Index.pdf...
  
   (CCI) (used in Canada. Replaced CCP.)
• Nursing Interventions Classification
  Nursing Interventions Classification
  The Nursing Interventions Classification is a care classification system which describes the activities that nurses perform as a part of the planning phase of the nursing process associate with the creation of a nursing care plan. The NIC consists of a standardized list which contains 433...
  
   (NIC) (used in United States)
• Nursing Minimum Data Set
  Nursing Minimum Data Set
  The Nursing Minimum Data Set is a classification system which allows for the standardized collection of essential nursing data. The collected data are meant to provide an accurate description of the nursing process used when providing nursing care...
  
   (NMDS)
• Nursing Outcomes Classification
  Nursing Outcomes Classification
  The Nursing Outcomes Classification is a classification system which describes patient outcomes sensitive to nursing intervention. The NOC is a system to evaluate the effects of nursing care as a part of the nursing process...
  
   (NOC)
• SNOMED (P axis)

European

• OPS-301
  OPS-301
  The Operationen- und Prozedurenschlüssel is the German modification of the ICPM and now the official classification of operational procedures for power control, the performance record and basis for the claims processing of the German hospitals and physicians.The OPS is now provided on an annual...
  
   (adaptation of ICPM used in Germany)
• OPCS-4.6 (used by the NHS in England)
• Classification des Actes Médicaux (CCAM) (used in France)
• NOMESCO
  NOMESCO
  NOMESCO is a medical classification system.It is used in some Nordic countries, Baltic countries, and Greece....
  
  
• Gebührenordnung für ärzte (GOÄ) (Germany)
• Nomenclature des prestations de santé de l'institut national d'assurance maladie invalidité (Belgium)
• TARMED (Switzerland)
• Classificatie van virrichtingen
  Classificatie van virrichtingen
  Classificatie van verrichtingen is a system of coding procedures.It is based on ICD-9-CM, but not identical to it.It is abbreviated "CvV".-External links:* http://www.hsmr.nl/faq/veelgestelde-vragen-codering...
  
   (Dutch)

Other

• Australian Classification of Health Interventions (ACHI)
• Read codes
  Read codes
  Read codes are the standard clinical terminology system used in General Practice in the United Kingdom. It supports detailed clinical encoding of multiple patient phenomena including: occupation; social circumstances; ethnicity and religion; clinical signs, symptoms and observations; laboratory...
  
  system used in United Kingdom General Practice