ICD-10 Code G50.9 – Disorder of trigeminal nerve, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G50.9 – Disorder of trigeminal nerve, unspecified
What it is
G50.9 identifies an unspecified disorder affecting the trigeminal nerve, the cranial nerve that carries facial sensation. Use it when documentation confirms a trigeminal nerve problem but does not name a more specific diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings may include facial pain, numbness, tingling, or altered sensation in one or more trigeminal nerve distributions.
When to use this code
Use this code when the clinician documents a trigeminal nerve disorder without further detail, such as neuralgia, neuropathy, or another specified lesion. It also fits cases where the record confirms trigeminal involvement but the exact cause or subtype is not stated. Check documentation if laterality or etiology is available.
Do not use for
Do not use G50.9 when the record specifies trigeminal neuralgia, trigeminal neuropathy, or another defined trigeminal condition. Do not use it for facial pain without documented trigeminal nerve disorder.
Coding tip
Look for the most specific trigeminal diagnosis in the note before defaulting to G50.9.