ICD-10 Code G54.1 – Lumbosacral plexus disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G54.1 – Lumbosacral plexus disorders
What it is
G54.1 identifies disorders affecting the lumbosacral plexus, the nerve network that supplies the pelvis, hips, legs, and feet. Use it when documentation shows a plexus-level nerve problem rather than a single peripheral nerve lesion.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include pain, numbness, weakness, or sensory loss in a distribution that fits lumbosacral plexus involvement.
When to use this code
Use G54.1 when the provider documents lumbosacral plexopathy, plexus disorder, or another confirmed plexus lesion affecting lower-extremity function. It also fits cases where the note identifies plexus involvement as the cause of pain, weakness, or sensory change. Check documentation if the record only says radiculopathy or sciatica.
Do not use for
Do not use this code for isolated lumbar radiculopathy, sciatic nerve disorders, or unspecified back pain without plexus involvement. If the diagnosis is unclear, check documentation before assigning G54.1.
Coding tip
Code the documented plexus disorder, not the symptom pattern, unless the provider clearly links the symptoms to lumbosacral plexus disease.