M12.871
BillableOther specific arthropathies, not elsewhere classified, right ankle and foot
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M12.871 an HCC code?
No. M12.871 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
M12.871 is the ICD-10-CM diagnosis code for other specific arthropathies, not elsewhere classified, right ankle and foot. A joint disorder affecting the right ankle and/or foot that doesn't fit into other specific arthropathy categories. This is used when the exact type of ankle or foot joint problem is unclear or doesn't match standard classifications. M12.871 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering inflammatory polyarthropathies (m05-m14).
M12.871 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.
Confirm documentation specifies right-sided involvement; if bilateral, use separate codes for each side.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M12.871 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm documentation specifies right-sided involvement; if bilateral, use separate codes for each side
- •Review whether the condition affects ankle, foot, or both structures to ensure accurate documentation