Case Mix Index

Description

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.

Resources

Name Format Description Link
33 Provides an example of how to use the Case Mix Index and the method to calculate it. https://data.chhs.ca.gov/dataset/5448f054-aa7f-4797-9de2-85767db93dff/resource/9a577735-3eb5-415d-9bb8-29e4a90fe5eb/download/cmiexamplecalculation.pdf
57 case-mix-index-htc47bi9.zip https://data.chhs.ca.gov/dataset/5448f054-aa7f-4797-9de2-85767db93dff/resource/d5cf4e0c-bbb3-4212-9af5-f69e8472ac81/download/case-mix-index-htc47bi9.zip
10 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. https://data.chhs.ca.gov/dataset/5448f054-aa7f-4797-9de2-85767db93dff/resource/5a04e554-8d37-4e81-9d6b-1170045bcc82/download/datadictionary-casemixindex.docx
53 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. https://data.chhs.ca.gov/dataset/5448f054-aa7f-4797-9de2-85767db93dff/resource/3ed58730-7dbb-4a48-bae5-0e66929c44f7/download/casemixindex_1996_2023.xlsx

Tags

  • weight
  • case-mix-index
  • hcai
  • drg
  • department-of-health-care-access-and-information
  • msdrg
  • cmi
  • ms-drg
  • diagnosis-related-group
  • acuity

Topics

Categories