ICD-10 Code G51.1 – Geniculate ganglionitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G51.1 – Geniculate ganglionitis
What it is
G51.1 identifies inflammation of the geniculate ganglion, a nerve ganglion involved in facial nerve function. Use it when documentation specifically names geniculate ganglionitis.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include facial nerve pain, weakness, or other facial nerve dysfunction when the clinician attributes them to geniculate ganglion inflammation.
When to use this code
Use this code when the provider documents geniculate ganglionitis or inflammation of the geniculate ganglion. It may also apply when the diagnosis is recorded as a facial nerve ganglionitis with clear anatomic specificity. If the note only says facial pain or facial palsy, check documentation before assigning this code.
Do not use for
Do not use it for nonspecific facial pain, Bell palsy, or other facial nerve disorders unless geniculate ganglionitis is documented. Check documentation if the record names a different cranial nerve or a broader neuritis.
Coding tip
Code G51.1 only when the provider explicitly links the condition to the geniculate ganglion; otherwise, query or code the documented facial nerve diagnosis.