ICD-10 Code G57.4 – Lesion of medial popliteal nerve (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.4 – Lesion of medial popliteal nerve
What it is
G57.4 identifies a disorder of the medial popliteal nerve, also called the tibial nerve in the popliteal region. Use it when documentation states a lesion, injury, or neuropathy affecting this specific nerve.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include sensory disturbance, pain, weakness, or abnormal nerve function in the distribution of the medial popliteal nerve.
When to use this code
Use G57.4 when the provider documents a lesion of the medial popliteal nerve without a more specific diagnosis. It may apply after trauma, compression, or other nerve pathology involving this nerve. Check documentation if the record instead identifies a different peripheral nerve or a broader neuropathy.
Do not use for
Do not use this code for generalized peripheral neuropathy, sciatica, or lesions of other nerves. If the note is nonspecific or unclear, check documentation before assigning G57.4.
Coding tip
Confirm the exact nerve named in the chart, because “popliteal” nerve terminology is sometimes used loosely.