Lesion of femoral nerve, unspecified lower limb

This code signifies an unspecified injury or dysfunction of the femoral nerve affecting an unstated lower limb. It indicates a general neurological issue impacting the motor and sensory functions supplied by the femoral nerve, such as quadriceps weakness or sensory deficits on the anterior thigh.

Use this code when documentation clearly indicates a lesion of the femoral nerve but does not specify the affected lower limb (left or right) or the exact cause of the lesion. This is appropriate for initial assessments or when diagnostic workup is incomplete regarding laterality or etiology.

• Avoid using this code if laterality (left or right) is documented; instead, choose G57.21 (right) or G57.22 (left).
• Always seek more specific documentation regarding the cause of the lesion (e.g., trauma, compression) to allow for more precise coding if available.
• Consider co-reporting with codes for associated symptoms (e.g., muscle weakness, sensory loss) if documented.