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ICD-10-CM 2027

ICD-10 code for ulnar nerve paralysis

G56.2

Lesion of ulnar nerve

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Paralysis, paralytic (complete) (incomplete) › ulnar nerve”. Page updated September 29, 2026.

About coding ulnar nerve paralysis

The ICD-10-CM code for ulnar nerve paralysis is G56.2 (Lesion of ulnar nerve).

Within G56 (mononeuropathies of upper limb), G56.2 is specifically for lesion of ulnar nerve. Related codes cover carpal tunnel syndrome (G56.0), other lesions of median nerve (G56.1), 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: G56.20 (unspecified upper limb), G56.21 (right upper limb), G56.22 (left upper limb) and G56.23 (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 ulnar nerve paralysis ICD-10 codes

What is the ICD-10 code for ulnar nerve paralysis?

G56.2 — Lesion of ulnar nerve (a header code; report a more specific subcode).

Is G56.2 billable?

No. G56.2 is a header code. Report one of its more specific subcodes instead.