M61.431
BillableOther calcification of muscle, right forearm
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M61.431 an HCC code?
No. M61.431 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
M61.431 is the ICD-10-CM diagnosis code for other calcification of muscle, right forearm. Calcium deposits have formed in the muscles of the right forearm. M61.431 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).
M61.431 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.
Verify documentation specifies right forearm to differentiate from left side.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M61.431 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.