ICD-10 Code G56.30 – Lesion of radial nerve, unspecified upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.30 – Lesion of radial nerve, unspecified upper limb
What it is
G56.30 identifies a disorder affecting the radial nerve in an upper limb, but the documentation does not specify which side. It is used when the record supports radial nerve involvement without a more detailed site.
Clinical signs
Typical findings include weakness of wrist or finger extension, sensory changes along the radial nerve distribution, or pain related to nerve dysfunction. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a lesion, neuropathy, or dysfunction of the radial nerve in an upper extremity and does not identify right or left. It also fits when the note confirms radial nerve involvement but gives no more specific diagnosis. Check documentation if the record suggests trauma, compression, or another named cause.
Do not use for
Do not use it when the documentation identifies the affected side, because a more specific code may apply. Do not use it for unrelated hand, wrist, or shoulder pain without confirmed radial nerve involvement.
Coding tip
Assign G56.30 only when the chart clearly supports radial nerve lesion and laterality is not stated.