ICD-10 Code G50.0 – Trigeminal neuralgia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G50.0 – Trigeminal neuralgia
What it is
G50.0 identifies trigeminal neuralgia, a disorder of the trigeminal nerve that causes sudden, severe facial pain. The pain is usually brief, stabbing, and limited to one or more trigeminal nerve branches.
Clinical signs
Typical documentation includes recurrent unilateral facial pain with sharp, electric shock-like episodes. Pain may be triggered by light touch, chewing, speaking, or brushing teeth; clinical features vary, refer to documentation.
When to use this code
Use G50.0 when the record clearly states trigeminal neuralgia or classical facial pain syndrome involving the trigeminal nerve. Code it when the provider documents the diagnosis, even if the visit is for evaluation, follow-up, or pain management. Check documentation if the pain source is not confirmed.
Do not use for
Do not use this code for nonspecific facial pain, headache, dental pain, or jaw pain without a trigeminal neuralgia diagnosis. If another nerve disorder or secondary cause is documented, code that condition instead.
Coding tip
Confirm that the provider names trigeminal neuralgia and distinguish it from other facial pain causes before assigning G50.0.