Case mix index
Case Mix Index (pronunciation: /keɪs mɪks ɪnˈdɛks/) is a relative value assigned to a diagnosis-related group of patients in a medical care environment. The Case Mix Index (CMI) represents the average diagnosis-related group relative weight for a hospital or other medical facility.
Etymology
The term "Case Mix Index" is derived from the concept of "case mix," which refers to a mix of types of patients treated by a hospital or other healthcare facility. The "index" in the term refers to a statistical or numerical indicator.
Definition
The Case Mix Index is used in healthcare to indicate the complexity, clinical severity, and resource needs of a group of patients. It is calculated by dividing the sum of all diagnosis-related group weights by the total number of patients in the group. The higher the CMI, the more complex the needs of the patient group.
Related Terms
- Diagnosis-Related Group: A system to classify hospital cases into one of approximately 500 groups, also referred to as DRGs, expected to have similar hospital resource use.
- Relative Weight: In the context of healthcare, relative weight refers to the amount of resources required to treat a particular patient, compared to the average amount of resources used to treat all patients.
- Healthcare Resource Group: A system similar to the DRG, used in the United Kingdom's National Health Service.
Usage
The Case Mix Index is used by hospitals to manage their resources and plan for future needs. It is also used in the calculation of hospital reimbursement rates by insurance companies and government programs such as Medicare.
See Also
External links
- Medical encyclopedia article on Case mix index
- Wikipedia's article - Case mix index
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