G57.21 ICD-10-CM Code: Lesion of femoral nerve, right lower limb

G57.21 is the ICD-10-CM diagnosis code for lesion of femoral nerve, right lower limb. This code describes damage or injury to the femoral nerve on the right side of the body, which can cause weakness, numbness, or pain in the thigh and lower leg. The femoral nerve is a major nerve that controls muscles in the front of the thigh and provides sensation to the leg. G57.21 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).

G57.21 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.

Verify the laterality is documented as right lower limb; if bilateral or left-sided, use the appropriate laterality code (G57.20 for unspecified side or G57.22 for left).