ICD-10-CM 2027
ICD-10 code for geniculate ganglionitis
From the official ICD-10-CM alphabetic index entry “Ganglionitis › geniculate”. Page updated September 29, 2026.
About coding geniculate ganglionitis
The ICD-10-CM code for geniculate ganglionitis is G51.1 (Geniculate ganglionitis). The official index lists 2 more specific codes, 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 ganglionitis codes (official index)
Don't confuse with (Excludes1 for G51.1)
- postherpetic geniculate ganglionitis (B02.21)
Common questions about geniculate ganglionitis ICD-10 codes
What is the ICD-10 code for geniculate ganglionitis?
- G51.1 — Geniculate ganglionitis. More specific codes apply when the documentation supports them: P11.3, B02.21.
What is the ICD-10 code for newborn geniculate ganglionitis?
- P11.3 — Birth injury to facial nerve.
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.