ICD-10 Code G57.33 – Lesion of lateral popliteal nerve, bilateral lower limbs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.33 – Lesion of lateral popliteal nerve, bilateral lower limbs
What it is
This code identifies damage or dysfunction of the lateral popliteal nerve, also called the common peroneal nerve, affecting both lower limbs. It is used when the nerve lesion is documented bilaterally.
Clinical signs
Typical findings include weakness of ankle dorsiflexion or foot eversion, sensory loss over the lateral leg or dorsum of the foot, and possible foot drop. Clinical features vary; refer to documentation.
When to use this code
Use G57.33 when the provider documents a bilateral lesion of the lateral popliteal nerve, whether due to compression, injury, or another specified cause. Apply it when both sides are clearly involved in the record. If laterality is unclear, check documentation before coding.
Do not use for
Do not use this code for unilateral peroneal nerve lesions or for nonspecific leg weakness without nerve involvement. It is also not appropriate if the record names a different peripheral nerve. Check documentation.
Coding tip
Verify that the note explicitly supports bilateral involvement and the lateral popliteal nerve before assigning G57.33.