ICD-10 Code G36.0 – Neuromyelitis optica [Devic] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G36.0 – Neuromyelitis optica [Devic]
What it is
G36.0 identifies neuromyelitis optica, a rare inflammatory disorder that mainly affects the optic nerves and spinal cord. It is used when documentation names Devic disease or neuromyelitis optica.
Clinical signs
Common findings include optic neuritis with vision loss or eye pain and myelitis with weakness, numbness, or bladder dysfunction. Clinical features vary; refer to documentation.
When to use this code
Use G36.0 when the provider documents neuromyelitis optica, Devic disease, or a confirmed NMO diagnosis. Code it for encounters focused on this condition, even if the note emphasizes relapse, follow-up, or neurologic deficits. Check documentation if the record only says demyelinating disease.
Do not use for
Do not use this code for multiple sclerosis or nonspecific optic neuritis unless neuromyelitis optica is documented. Check documentation when the diagnosis is uncertain or only suspected.
Coding tip
Match the code to the exact provider wording, and confirm whether the record states neuromyelitis optica, Devic disease, or another demyelinating diagnosis.