ICD-11 classes
08 Diseases of the nervous system
Disorders of nerve root, plexus or peripheral nerves
Disorders of cranial nerves
8B88 — Disorders of facial nerve
8B88.2 — Hemifacial spasm

ICD-11 8B88.2 — Hemifacial spasm

Hemifacial spasm (HFS) is a movement disorder most commonly caused by vascular compression of the VII cranial nerve at its root exit zone from the brainstem. It manifests as involuntary contractions and twitching on ipsilateral side of the face.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.

The diagnosis is coded elsewhere:

• Movement disorders #6602
• Movement disorders of eyelid #9211