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.

This dataset updates every year

Data and Resources

Metadata

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Issued 2017-06-16T22:30:35.826295
Modified 2020-12-09T16:29:13.129125
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Contact name -
Email address dataandreports@oshpd.ca.gov
Identifier -
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Accrual periodicity Annually
Language English (EN)
Provenance Office of Statewide Health Planning and Development, Healthcare Analytics Branch
Temporal extent 1996-current year
Spatial extent Statewide
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