M22.3X2
BillableOther derangements of patella, left knee
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M22.3X2 an HCC code?
No. M22.3X2 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
M22.3X2 is the ICD-10-CM diagnosis code for other derangements of patella, left knee. The kneecap on the left knee has structural or functional problems not covered by other specific patella conditions. M22.3X2 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering other joint disorders (m20-m25).
M22.3X2 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.
Review documentation to determine if a more specific patella code would be more appropriate.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M22.3X2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Review documentation to determine if a more specific patella code would be more appropriate
- •The fifth character (2) indicates left knee; confirm this matches the documented location