ICD-10 Code G56.32 – Lesion of radial nerve, left upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.32 – Lesion of radial nerve, left upper limb
What it is
G56.32 identifies a disorder affecting the radial nerve in the left upper limb. Use it when documentation shows nerve lesion, palsy, or compression limited to the left side.
Clinical signs
Typical findings include weakness in wrist or finger extension, sensory changes over the radial nerve distribution, or pain radiating along the arm. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record specifically states lesion of the left radial nerve, including neuropathy or palsy limited to that nerve. It may apply after trauma, entrapment, or another documented cause. Check documentation if laterality or nerve involvement is unclear.
Do not use for
Do not use it for right-sided or unspecified radial nerve lesions, or for generalized upper-extremity neuropathy. Also avoid it when the diagnosis is only suspected or not clearly documented.
Coding tip
Confirm the left-sided radial nerve involvement in the assessment, not just arm pain or weakness.