M65.972
BillableUnspecified synovitis and tenosynovitis, left ankle and foot
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M65.972 an HCC code?
No. M65.972 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
M65.972 is the ICD-10-CM diagnosis code for unspecified synovitis and tenosynovitis, left ankle and foot. Inflammation of the tissue lining the tendons in the left ankle and foot, with unspecified cause. M65.972 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering disorders of synovium and tendon (m65-m67).
M65.972 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.
This code requires laterality specification (left side); verify documentation clearly indicates left ankle/foot involvement.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M65.972 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code requires laterality specification (left side); verify documentation clearly indicates left ankle/foot involvement
- •Use this code only when the specific type of synovitis or tenosynovitis cannot be determined from the medical record