G56Header code — not billable
Mononeuropathies of upper limb
- Chapter
- 6. Diseases of the nervous system
- Category
- G56
- Effective date
- October 1, 2026
Related codes in category G56
G56.0Carpal tunnel syndromeG56.00Carpal tunnel syndrome, unspecified upper limbYesG56.01Carpal tunnel syndrome, right upper limbYesG56.02Carpal tunnel syndrome, left upper limbYesG56.03Carpal tunnel syndrome, bilateral upper limbsYesG56.1Other lesions of median nerveG56.10Other lesions of median nerve, unspecified upper limbYesG56.11Other lesions of median nerve, right upper limbYesG56.12Other lesions of median nerve, left upper limbYesG56.13Other lesions of median nerve, bilateral upper limbsYesG56.2Lesion of ulnar nerveG56.20Lesion of ulnar nerve, unspecified upper limbYes
Frequently asked questions
What is ICD-10 code G56?
G56 is an ICD-10-CM diagnosis code for Mononeuropathies of upper limb.
Is G56 a billable code?
No. G56 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is G56 in?
G56 falls under Chapter 6: Diseases of the nervous system.
When did G56 become effective?
G56 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to G56?
G56 belongs to category G56, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.