Research Addressing the HHS Strategic Framework on Multiple Chronic Conditions. Appendix 6: Comparison of ICD9 Codes Used in Four Clinical Classification Systems


The Appendix contains a side by side comparison of ICD-9 groupings across four separate grouper systems: 1) AHRQ’s Healthcare Cost and Utilization Project Clinical Classifications Software (HCUP CCS), 2) Medicare’s Hierarchical Condition Categories (HCC), 3) CMS’ Chronic Conditions Warehouse (CCW) condition categories, and 4) Medicaid’s Chronic Illness and Disability Payment System (CDPS) classification system.

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