G56.20 Lesion of ulnar nerve, unspecified upper limb

Billable ICD-10-CM code, FY2026.

Applies from G56 Mononeuropathies of upper limb

Excludes1 (never code together)

• current traumatic nerve disorder - see nerve injury by body region

Applies from G56.2 Lesion of ulnar nerve

Applicable to

• Tardy ulnar nerve palsy

MS-DRG index

Defines the logic of DRG(s) 073-074 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 354.2 Lesion of ulnar nerve (approximate)

Code annotations containing back-references to G56.20

Back-references to G56

• Type 1 Excludes: M79.2 Neuralgia and neuritis, unspecified ("mononeuropathies (G56-G58)")

Nearby codes

• G56.10 Other lesions of median nerve, unspecified upper limb
• G56.11 Other lesions of median nerve, right upper limb
• G56.12 Other lesions of median nerve, left upper limb
• G56.13 Other lesions of median nerve, bilateral upper limbs
• G56.2 Lesion of ulnar nerve
• G56.20 Lesion of ulnar nerve, unspecified upper limb (this code)
• G56.21 Lesion of ulnar nerve, right upper limb
• G56.22 Lesion of ulnar nerve, left upper limb
• G56.23 Lesion of ulnar nerve, bilateral upper limbs
• G56.3 Lesion of radial nerve
• G56.30 Lesion of radial nerve, unspecified upper limb