ICD-10-CM 2027
ICD-10 code for geniculate ganglion neuritis
From the official ICD-10-CM alphabetic index entry “Neuritis (rheumatoid) › geniculate ganglion”. Page updated September 29, 2026.
About coding geniculate ganglion neuritis
The ICD-10-CM code for geniculate ganglion neuritis is G51.1 (Geniculate ganglionitis). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on G51.1.
Within G51 (facial nerve disorders), G51.1 is specifically for geniculate ganglionitis. Related codes cover Bell's palsy (G51.0), Melkersson's syndrome (G51.2), Clonic hemifacial spasm (G51.3), facial myokymia (G51.4), other disorders of facial nerve (G51.8) and disorder of facial nerve, unspecified (G51.9).
Don't report G51.1 together with the conditions in its Excludes1 note: postherpetic geniculate ganglionitis (B02.21).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific geniculate ganglion neuritis codes (official index)
- due to herpes (zoster) B02.21 — Postherpetic geniculate ganglionitis
Don't confuse with (Excludes1 for G51.1)
- postherpetic geniculate ganglionitis (B02.21)
Common questions about geniculate ganglion neuritis ICD-10 codes
What is the ICD-10 code for geniculate ganglion neuritis?
- G51.1 — Geniculate ganglionitis. More specific codes apply when the documentation supports them: B02.21.
Is G51.1 billable?
- Yes. G51.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G51.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G51.1 as a principal diagnosis.
Is G51.1 a CC or MCC?
- No. G51.1 is neither a CC nor an MCC under MS-DRG v44.0.