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  5. Category G51
Category G51

Facial nerve disorders

Clinical Classification Guidelines

Specific Diagnosis Codes

Bell's palsy
G51.0
Geniculate ganglionitis
G51.1
Melkersson's syndrome
G51.2
Clonic hemifacial spasm
G51.3
Clonic hemifacial spasm, right
G51.31
Clonic hemifacial spasm, left
G51.32
Clonic hemifacial spasm, bilateral
G51.33
Clonic hemifacial spasm, unspecified
G51.39
Facial myokymia
G51.4
Other disorders of facial nerve
G51.8
Disorder of facial nerve, unspecified
G51.9
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Data updated for October 2025 release.

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