ICD-11 classes
09 Diseases of the visual system
Disorders of the ocular adnexa or orbit
Disorders of eyelid or peri-ocular area
9A05 — Movement disorders of eyelid
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
• Disorders of facial nerve #7249