V24 HCC 77 (Archived Category) ICD-10-CM
HCC 77 is a payment category of the retired CMS-HCC V24 model, which last determined Medicare Advantage payment in 2025. The 12 ICD-10-CM codes below are its final mappings, kept for lookback analysis and RADV audit reference. Each code shows where it maps in the live V28 model.
Archived Codes of V24 HCC 77 12 codes
- G35 Multiple sclerosis now HCC 198
- G36.0 Neuromyelitis optica [Devic] now HCC 198
- G36.1 Acute and subacute hemorrhagic leukoencephalitis [Hurst] now HCC 198
- G36.8 Other specified acute disseminated demyelination now HCC 198
- G36.9 Acute disseminated demyelination, unspecified now HCC 198
- G37.0 Diffuse sclerosis of central nervous system now HCC 198
- G37.1 Central demyelination of corpus callosum now HCC 198
- G37.2 Central pontine myelinolysis now HCC 198
- G37.5 Concentric sclerosis [Balo] of central nervous system now HCC 198
- G37.81 Myelin oligodendrocyte glycoprotein antibody disease now HCC 198
- G37.89 Other specified demyelinating diseases of central nervous system now HCC 198
- G37.9 Demyelinating disease of central nervous system, unspecified now HCC 198
Questions About This Archived Category
Is V24 HCC 77 still paid?
No. The CMS-HCC V24 model last determined Medicare Advantage payment in 2025; from payment year 2026 the V28 model pays 100% of the risk score. This page exists for lookback analysis and RADV audit periods that predate the transition.
Where did these codes go in V28?
Each row above names the code's live V28 category. The category-level picture, with destination counts for every V24 category, is on V24 to V28: What Changed.
Related References
Source: Centers for Medicare & Medicaid Services, Payment Year 2026 risk adjustment mapping and model software releases (CMS-HCC V28; CMS-HCC V24 from the last published V24 mappings, payment year 2025), applied to the FY 2026 ICD-10-CM code set. ICD List is not affiliated with CMS.
