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.

Data and Resources

Additional Info

Field Value
Public Access Level Public
Rights No restrictions on public use
Program Contact Name Department of Health Care Access and Information, Healthcare Analytics Branch
Program Contact Email [email protected]
Frequency Annual
Temporal Coverage

1996-current year

Source Link https://hcai.ca.gov/data-and-reports/healthcare-utilization/#patient-data
Last Updated March 28, 2024, 07:18 (UTC)
Created August 11, 2023, 01:15 (UTC)
DCAT Issued Date 2017-06-16T22:30:35.826295
DCAT Modified Date 2023-10-02T14:33:08.378181