ICD-10 Code G57.22 – Lesion of femoral nerve, left lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.22 – Lesion of femoral nerve, left lower limb
What it is
G57.22 identifies a disorder affecting the femoral nerve on the left side of the lower limb. Use it when documentation specifies a femoral nerve lesion, neuropathy, or palsy limited to the left leg.
Clinical signs
Typical findings may include weakness of knee extension, reduced patellar reflex, and sensory changes over the anterior thigh or medial leg. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents left femoral nerve injury, compression, entrapment, or neuropathy affecting the lower limb. It is appropriate when the record clearly localizes the problem to the left femoral nerve. If laterality is not stated, check documentation before coding.
Do not use for
Do not use this code for generalized peripheral neuropathy or for symptoms without a documented femoral nerve lesion. Do not assign it when the nerve involved is different, such as the sciatic or obturator nerve.
Coding tip
Confirm both the nerve and the laterality in the note before assigning G57.22.