ICD-10 Code G54.9 – Nerve root and plexus disorder, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G54.9 – Nerve root and plexus disorder, unspecified
What it is
G54.9 identifies a disorder affecting a nerve root or nerve plexus when the specific site or type is not documented. Use it when the record confirms a root or plexus problem but does not name a more exact diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Notes may describe pain, numbness, weakness, or reduced reflexes in a pattern suggesting nerve root or plexus involvement.
When to use this code
Use this code when the provider documents a nerve root or plexus disorder but does not specify whether it is cervical, thoracic, lumbar, sacral, or another named condition. It is also appropriate when the chart lacks enough detail to assign a more specific code.
Do not use for
Do not use G54.9 if the documentation names a specific nerve root, plexus, or better-defined neuropathy. Check documentation before assigning it for pain alone without a documented root or plexus disorder.
Coding tip
Look for the anatomic location and underlying cause first; if the record is vague, G54.9 may be the best available choice.