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ICD-10-CM 2027

ICD-10 code for ascending acute neuronitis

G57.2

Lesion of femoral nerve

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Neuronitis › ascending (acute)”. Page updated September 29, 2026.

About coding ascending acute neuronitis

The ICD-10-CM code for ascending acute neuronitis is G57.2 (Lesion of femoral nerve).

Within G57 (mononeuropathies of lower limb), G57.2 is specifically for lesion of femoral nerve. Related codes cover lesion of sciatic nerve (G57.0), Meralgia paresthetica (G57.1), lesion of lateral popliteal nerve (G57.3), lesion of medial popliteal nerve (G57.4), tarsal tunnel syndrome (G57.5), lesion of plantar nerve (G57.6), Causalgia of lower limb (G57.7), other specified mononeuropathies of lower limb (G57.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: G57.20 (unspecified lower limb), G57.21 (right lower limb), G57.22 (left lower limb) and G57.23 (bilateral lower limbs).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about ascending acute neuronitis ICD-10 codes

What is the ICD-10 code for ascending acute neuronitis?

G57.2 — Lesion of femoral nerve (a header code; report a more specific subcode).

Is G57.2 billable?

No. G57.2 is a header code. Report one of its more specific subcodes instead.