ICD-10 Code G57.20 – Lesion of femoral nerve, unspecified lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.20 – Lesion of femoral nerve, unspecified lower limb
What it is
G57.20 identifies a lesion of the femoral nerve affecting an unspecified lower limb. Use it when documentation states femoral nerve injury, neuropathy, or lesion, but does not specify right or left side.
Clinical signs
Typical findings may include anterior thigh sensory changes, weakness with hip flexion or knee extension, and reduced patellar reflex. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents femoral nerve lesion without laterality. It also fits cases where the record confirms femoral neuropathy, but the affected limb is not identified. If the note names a specific side, code the laterality instead.
Do not use for
Do not use G57.20 for general leg pain, lumbar radiculopathy, or sciatic nerve disorders. Check documentation if the record describes a different peripheral nerve or a more specific diagnosis.
Coding tip
Confirm that the note supports femoral nerve involvement and that laterality is truly unspecified before assigning G57.20.