ICD-10 Code G54.5 – Neuralgic amyotrophy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G54.5 – Neuralgic amyotrophy
What it is
G54.5 identifies neuralgic amyotrophy, also called brachial neuritis or Parsonage-Turner syndrome. It refers to an acute painful disorder of the brachial plexus and related nerves, often followed by weakness and muscle wasting.
Clinical signs
Typical findings include sudden severe shoulder or upper arm pain, then weakness, reduced range of motion, and possible atrophy in the affected distribution. Clinical features vary; refer to documentation.
When to use this code
Use G54.5 when the record documents neuralgic amyotrophy, brachial neuritis, or Parsonage-Turner syndrome as the confirmed diagnosis. It is appropriate when the clinician describes the characteristic pain followed by neurologic weakness. If the note only says arm pain or neuropathy, check documentation.
Do not use for
Do not use this code for nonspecific shoulder pain, cervical radiculopathy, or traumatic nerve injury unless neuralgic amyotrophy is documented. Check documentation for the exact diagnosis.
Coding tip
Code G54.5 only when the provider clearly links the symptoms to neuralgic amyotrophy, not when the chart lists pain and weakness without a named diagnosis.