G57.92
BillableUnspecified mononeuropathy of left lower limb
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is G57.92 an HCC code?
No. G57.92 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
G57.92 is the ICD-10-CM diagnosis code for unspecified mononeuropathy of left lower limb. This code describes nerve damage affecting a single nerve in the left leg, but the specific nerve involved has not been identified or documented. The condition causes weakness, numbness, or pain in the affected leg. G57.92 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering nerve, nerve root and plexus disorders (g50-g59).
G57.92 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 to identify the specific nerve affected (e.g., peroneal, tibial, femoral) as this will allow for a more specific code assignment and better clinical documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G57.92 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Query the provider to identify the specific nerve affected (e.g., peroneal, tibial, femoral) as this will allow for a more specific code assignment and better clinical documentation
- •Ensure laterality is correctly documented as 'left' - if the condition affects the right leg or is bilateral, different codes (G57.91 or G57.90) should be used instead