M60.879
BillableOther myositis, unspecified ankle and foot
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M60.879 an HCC code?
No. M60.879 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
M60.879 is the ICD-10-CM diagnosis code for other myositis, unspecified ankle and foot. Inflammation of muscle tissue in the ankle and foot region when the specific side is not documented or specified. M60.879 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering disorders of muscles (m60-m63).
M60.879 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Use this code for bilateral ankle and foot myositis or when laterality is unclear.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M60.879 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code for bilateral ankle and foot myositis or when laterality is unclear
- •Query the provider if documentation allows for more specific laterality assignment