M23.311
BillableOther meniscus derangements, anterior horn of medial meniscus, right knee
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M23.311 an HCC code?
No. M23.311 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
M23.311 is the ICD-10-CM diagnosis code for other meniscus derangements, anterior horn of medial meniscus, right knee. Damage or displacement of the front portion (anterior horn) of the inner meniscus in the right knee. M23.311 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).
M23.311 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 specifies both the location (anterior horn) and the meniscus type (medial), so ensure documentation supports this specificity.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M23.311 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code specifies both the location (anterior horn) and the meniscus type (medial), so ensure documentation supports this specificity
- •Anterior horn meniscus tears are common in sports injuries and degenerative conditions