Codes and Classifications

CIHI collects comparable, pan-Canadian data on Canada’s health systems. As part of this effort, we set the national standard for morbidity data reporting in Canada and maintain, distribute and support the application of ICD-10-CA (the Canadian modification of ICD-10). We developed the Canadian Classification of Health Interventions (CCI), which is the national standard for classifying health care procedures. Further, we work closely with Statistics Canada, which supports the mortality application of ICD-10.

CIHI, in collaboration with our colleagues at Statistics Canada, is designated as a Collaborating Centre for the World Health Organization Family of International Classifications (WHO-FIC). As a Collaborating Centre, CIHI

  • Contributes to work on the development, dissemination, maintenance and use of WHO health classifications, including the International Classification of Diseases (ICD)
  • Brings a strategic Canadian perspective to international discussions about the development and deployment of health classifications in support of health information, statistics and evidence

Canadian classifications

ICD-10-CA (International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Canada) was developed by the World Health Organization (WHO) and enhanced by CIHI to meet Canadian morbidity data needs. ICD-10-CA classifies diseases, injuries and causes of death, as well as external causes of injury and poisoning. It also includes conditions and situations that are not diseases but represent risk factors to health, such as occupational and environmental factors, and lifestyle and psychosocial circumstances.

CCI (Canadian Classification of Health Interventions) was developed by CIHI to accompany ICD-10-CA. It was designed to be service-provider and service-setting neutral and can be used comprehensively throughout Canada’s health systems. CCI classifies a broad range of interventions, including therapeutic and diagnostic interventions and other health care interventions, such as assistance with activities of daily living, environmental assessments and counselling.

Other WHO classifications

ICD-11 is the 11th revision of the International Classification of Diseases. Developed by WHO, it is the global standard for diagnostic health information. Learn about Canada’s involvement.

ICF: The International Classification of Functioning, Disability and Health, developed by WHO, is a classification of health and health-related domains that describe body functions and structures, activities and participation, and environmental factors. 

Make a request for enhancements, additions or changes to ICD-10-CA and/or CCI.

Classification resources

Classification resources

Explore our classification resources to learn more about our companion products that can be used with the classifications to support data collection and analysis.

Go to Classification resources page

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COVID-19 resources

We are collecting, analyzing and sharing credible data to help improve our health care systems and the health of all Canadians. Take a closer look at our key reports and resources containing information related to the COVID-19 pandemic.

Go to COVID-19 resources page >


Search CIHI’s repository of answers on topics related to coding and abstracting data for DAD and NACRS, or submit your questions about these CIHI products and services.

Go to eQuery >

Version 2022 ICD-10-CA and CCI

Find out which codes are new and which are disabled for the v2022 ICD-10-CA/CCI classifications, plus all the software requirements.

Go to version 2022 ICD-10-CA/CCI >

ICD-11 page

Discover how we’re participating in WHO’s 11th revision of the International Classification of Diseases.

Learn about ICD-11 >

NACRS pick-list

The National Ambulatory Care Reporting System (NACRS) contains data for all hospital-based and community-based ambulatory care. The Canadian Emergency Department Diagnosis Shortlist (CED-DxS) is a list of codes and descriptions for emergency department coding.

Go to NACRS pick-lists >

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