ICD-10-CM 2027
ICD-10 code for Gasserian ganglion lesion
From the official ICD-10-CM alphabetic index entry “Lesion (s) (nontraumatic) › gasserian ganglion”. Page updated September 29, 2026.
About coding Gasserian ganglion lesion
The ICD-10-CM code for Gasserian ganglion lesion is G50.8 (Other disorders of trigeminal nerve).
Within G50, choose G50.8 (Other disorders of trigeminal nerve) only when documentation doesn't support a more specific option: trigeminal neuralgia (G50.0), atypical facial pain (G50.1) 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.
Common questions about Gasserian ganglion lesion ICD-10 codes
What is the ICD-10 code for Gasserian ganglion lesion?
- G50.8 — Other disorders of trigeminal nerve.
Is G50.8 billable?
- Yes. G50.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G50.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G50.8 as a principal diagnosis.
Is G50.8 a CC or MCC?
- No. G50.8 is neither a CC nor an MCC under MS-DRG v44.0.