Term: Case Mix Groups (CMG™)

Glossary Definition

Last Updated: 2009-04-09


A Canadian patient classification system developed by the Canadian Institute for Health Information (CIHI), based on most responsible diagnosis, used to group and describe types of inpatients discharged from acute care hospitals. Each patient case is initially assigned to one of 25 mutually exclusive major clinical categories (MCC), which are based on body systems (e.g., circulatory, respiratory), then further classified as medical or surgical, and finally the CMG is assigned to create homogeneous groups. Cases within the same CMG are subsequently assigned to typical or atypical categories, and classified according to age group and complexity level.

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