ICD-10 Code G56.33 – Lesion of radial nerve, bilateral upper limbs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.33 – Lesion of radial nerve, bilateral upper limbs
What it is
G56.33 identifies injury, compression, or dysfunction of the radial nerve affecting both upper limbs. Use it when the documentation specifies bilateral radial nerve lesion rather than a more general neuropathy.
Clinical signs
Typical findings may include wrist or finger extension weakness, numbness over the dorsum of the hands, and reduced radial-nerve sensation. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a lesion of the radial nerve in both arms or both upper limbs. It may apply after trauma, entrapment, or another confirmed nerve disorder affecting each side. If the note only says “radial neuropathy,” check documentation for laterality and specificity.
Do not use for
Do not use this code for isolated unilateral radial nerve lesions or for nonspecific arm pain without nerve involvement. Check documentation if the record instead describes another peripheral nerve, cervical radiculopathy, or a different neurologic diagnosis.
Coding tip
Confirm bilateral laterality in the assessment or diagnosis statement before assigning G56.33.