data-dictionary-case-mix-index
The Case Mix Index (CMI) is the average relative DRG weight of a hospital’s inpatient discharges, calculated by summing the Medicare Severity-Diagnosis Related Group (MS-DRG) weight for each discharge and dividing the total by the number of discharges. The CMI reflects the diversity, clinical complexity, and resource needs of all the patients in the hospital. A higher CMI indicates a more complex and resource-intensive case load. Although the MS-DRG weights, provided by the Centers for Medicare & Medicaid Services (CMS), were designed for the Medicare population, they are applied here to all discharges regardless of payer. Note: It is not meaningful to add the CMI values together.
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Additional Information
| Field | Value |
|---|---|
| Data last updated | April 28, 2022 |
| Metadata last updated | November 22, 2025 |
| Created | April 28, 2022 |
| Format | DOC |
| License | License not specified |
| Datastore active | False |
| Has views | False |
| Id | c09d23a9-a2e5-4e38-bb0c-9f253842e122 |
| Mimetype | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| Package id | 67c25292-bf0b-4a26-8e36-485086495105 |
| Position | 1 |
| State | active |