ICD-10 Code G56.10 – Other lesions of median nerve, unspecified upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.10 – Other lesions of median nerve, unspecified upper limb
What it is
Code G56.10 identifies a disorder affecting the median nerve in an unspecified upper limb. Use it when documentation states another median nerve lesion, but does not name a more specific diagnosis or side.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include numbness, tingling, pain, or weakness in a median nerve distribution, but the exact presentation depends on the underlying lesion.
When to use this code
Use this code when the provider documents a median nerve lesion in the arm or hand and does not specify the left or right side. It also fits cases described as an “other” lesion rather than a named entrapment or traumatic injury.
If the record includes only vague neuropathy language, check documentation before assigning G56.10. You should code the documented median nerve disorder, not a broader peripheral nerve diagnosis, unless the note supports it.
Do not use for
Do not use this code for carpal tunnel syndrome, traumatic nerve injury, or lesions of a different nerve. If the affected side is documented, use the appropriate laterality-specific code instead.
Coding tip
Verify both the nerve involved and the laterality; if either is missing, check documentation before coding G56.10.