M23.322
BillableOther meniscus derangements, posterior horn of medial meniscus, left knee
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M23.322 an HCC code?
No. M23.322 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
M23.322 is the ICD-10-CM diagnosis code for other meniscus derangements, posterior horn of medial meniscus, left knee. Damage or displacement of the back portion (posterior horn) of the inner meniscus in the left knee. M23.322 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).
M23.322 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.
Posterior horn meniscus tears are frequently associated with degenerative joint disease and may be chronic.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M23.322 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Posterior horn meniscus tears are frequently associated with degenerative joint disease and may be chronic
- •Ensure documentation clearly indicates the posterior location to support this specific code selection