M91.91
BillableJuvenile osteochondrosis of hip and pelvis, unspecified, right leg
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M91.91 an HCC code?
No. M91.91 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
M91.91 is the ICD-10-CM diagnosis code for juvenile osteochondrosis of hip and pelvis, unspecified, right leg. A bone condition in children affecting the right hip and pelvis where the bone and cartilage junction deteriorates, with unspecified type. M91.91 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering chondropathies (m91-m94).
M91.91 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.
Use this code when the right side is documented but the specific type of osteochondrosis cannot be determined.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M91.91 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.