ICD-10 Code G57.3 – Lesion of lateral popliteal nerve (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.3 – Lesion of lateral popliteal nerve
What it is
G57.3 identifies a disorder of the lateral popliteal nerve, also called the common peroneal nerve. It is used when that nerve is damaged, compressed, or otherwise affected.
Clinical signs
Typical findings include weakness of ankle dorsiflexion or foot eversion, sensory changes over the lateral leg or top of the foot, and possible foot drop. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents a lesion, neuropathy, or entrapment involving the lateral popliteal nerve. It fits unilateral or bilateral nerve involvement only if the documentation supports that diagnosis. Check documentation if the note is vague.
Do not use for
Do not use it for generalized peripheral neuropathy, sciatica, or muscle weakness without nerve involvement. If the provider names a different nerve or a more specific cause, code that condition instead.
Coding tip
Look for explicit mention of the lateral popliteal or common peroneal nerve before assigning G57.3.