M23.92
BillableUnspecified internal derangement of left knee
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M23.92 an HCC code?
No. M23.92 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
M23.92 is the ICD-10-CM diagnosis code for unspecified internal derangement of left knee. A condition where the internal structures of the left knee joint are damaged or displaced, but the specific type of damage is not identified. M23.92 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).
M23.92 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.
Query the provider if more specific internal derangement details are available (meniscal tear, ligament damage, etc.) to assign a more specific code.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M23.92 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Query the provider if more specific internal derangement details are available (meniscal tear, ligament damage, etc.) to assign a more specific code
- •Ensure laterality is correctly documented as left knee; do not use this code for right knee or bilateral conditions