Other specified mononeuropathies of bilateral lower limbs

This code signifies a mononeuropathy affecting both lower limbs, where the specific nerve involved is known but does not have a more precise ICD-10-CM code. It indicates damage or dysfunction of a single peripheral nerve on each side, leading to symptoms such as pain, numbness, weakness, or paresthesia in the affected areas of both legs.

Apply this code when documentation clearly identifies a mononeuropathy in both lower extremities, and the specific nerve (e.g., bilateral peroneal neuropathy, bilateral tibial neuropathy) is documented, but no more specific code exists. This code is appropriate when the etiology is known or unknown, but the condition is not generalized polyneuropathy.

• Ensure documentation specifies "bilateral" involvement and identifies the affected nerve(s) in the lower limbs.
• Distinguish from polyneuropathies (G60-G64) which involve multiple nerves, often symmetrically.
• Always look for a more specific code within the G57 series first if the exact nerve and laterality are precisely defined.