M85.572
BillableAneurysmal bone cyst, left ankle and foot
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M85.572 an HCC code?
No. M85.572 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
M85.572 is the ICD-10-CM diagnosis code for aneurysmal bone cyst, left ankle and foot. A fluid-filled cavity in the bone of the left ankle or foot that can cause swelling and weakening of the bone structure. M85.572 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering disorders of bone density and structure (m80-m85).
M85.572 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 covers both ankle and foot bones on the left side; verify left-sided involvement in documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M85.572 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code covers both ankle and foot bones on the left side; verify left-sided involvement in documentation
- •Consider documenting which specific bone (tarsal, metatarsal, etc.) is affected for clinical clarity