M60.839
BillableOther myositis, unspecified forearm
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M60.839 an HCC code?
No. M60.839 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
M60.839 is the ICD-10-CM diagnosis code for other myositis, unspecified forearm. Inflammation of muscle tissue in the forearm when the specific side is not identified. M60.839 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).
M60.839 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.
Avoid this code if laterality can be determined; query provider for clarification on right vs. left.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M60.839 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Avoid this code if laterality can be determined; query provider for clarification on right vs. left
- •Use only as a last resort when documentation is insufficient for side specification