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
57 case-mix-index-rawtta.zip https://data.chhs.ca.gov/dataset/5448f054-aa7f-4797-9de2-85767db93dff/resource/d5cf4e0c-bbb3-4212-9af5-f69e8472ac81/download/case-mix-index-rawtta.zip
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
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_2022.xlsx
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

Tags

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

Topics

Categories