ICD-10-CM 2027
ICD-10 code for trigeminal neuralgia
From the official ICD-10-CM alphabetic index entry “Neuralgia, neuralgic (acute) › trigeminal”. Page updated September 29, 2026.
About coding trigeminal neuralgia
The ICD-10-CM code for trigeminal neuralgia is G50.0 (Trigeminal neuralgia). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on G50.0.
Within G50 (disorders of trigeminal nerve), G50.0 is specifically for trigeminal neuralgia. Related codes cover atypical facial pain (G50.1), other disorders of trigeminal nerve (G50.8) and disorder of trigeminal nerve, unspecified (G50.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 073 (Cranial and Peripheral Nerve Disorders with MCC, relative weight 1.5779) and DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific trigeminal neuralgia codes (official index)
- postherpetic, postzoster B02.22 — Postherpetic trigeminal neuralgia
Common questions about trigeminal neuralgia ICD-10 codes
What is the ICD-10 code for trigeminal neuralgia?
- G50.0 — Trigeminal neuralgia. More specific codes apply when the documentation supports them: B02.22.
Is G50.0 billable?
- Yes. G50.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G50.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G50.0 as a principal diagnosis.
Is G50.0 a CC or MCC?
- No. G50.0 is neither a CC nor an MCC under MS-DRG v44.0.