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ICD-10-CM 2027

ICD-10 code for thenar median neuritis

G56.1

Other lesions of median nerve

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Neuritis (rheumatoid) › thenar (median)”. Page updated September 29, 2026.

About coding thenar median neuritis

The ICD-10-CM code for thenar median neuritis is G56.1 (Other lesions of median nerve).

Within G56, choose G56.1 (Other lesions of median nerve) only when documentation doesn't support a more specific option: carpal tunnel syndrome (G56.0), lesion of ulnar nerve (G56.2), lesion of radial nerve (G56.3), Causalgia of upper limb (G56.4), other specified mononeuropathies of upper limb (G56.8) and unspecified mononeuropathy of upper limb (G56.9).

To report this condition, pick the subcode that matches the documentation: G56.10 (unspecified upper limb), G56.11 (right upper limb), G56.12 (left upper limb) and G56.13 (bilateral upper 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 thenar median neuritis ICD-10 codes

What is the ICD-10 code for thenar median neuritis?

G56.1 — Other lesions of median nerve (a header code; report a more specific subcode).

Is G56.1 billable?

No. G56.1 is a header code. Report one of its more specific subcodes instead.