ICD-10 Code G57.43 – Lesion of medial popliteal nerve, bilateral lower limbs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.43 – Lesion of medial popliteal nerve, bilateral lower limbs
What it is
Use this code for a documented lesion or injury affecting the medial popliteal nerve in both lower limbs. It identifies a bilateral peripheral nerve disorder rather than a generalized neuropathy.
Clinical signs
Clinical features vary; refer to documentation. You may see sensory changes, pain, weakness, or other nerve-related deficits in both legs when the medial popliteal nerve is involved.
When to use this code
Assign G57.43 when the provider documents a lesion of the medial popliteal nerve affecting both lower limbs. Use it for confirmed bilateral nerve involvement, such as after trauma, compression, or another specified nerve disorder. If the record does not clearly state bilateral involvement, check documentation.
Do not use for
Do not use this code for nonspecific leg pain, sciatica, or generalized peripheral neuropathy without medial popliteal nerve involvement. Check documentation if the nerve affected is different or if laterality is not bilateral.
Coding tip
Code only when the provider clearly identifies the medial popliteal nerve and bilateral lower limbs; otherwise, verify laterality and nerve site in the note.