ICD-10 Code G51.32 – Clonic hemifacial spasm, left (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G51.32 – Clonic hemifacial spasm, left
What it is
This code identifies involuntary, repetitive clonic contractions of the facial muscles on the left side. It is used when documentation specifies a left-sided hemifacial spasm.
Clinical signs
Typical findings include brief, repeated twitching or jerking of muscles on one side of the face. Clinical features vary; refer to documentation.
When to use this code
Use G51.32 when the record clearly states clonic hemifacial spasm affecting the left side. Code it when the provider documents unilateral facial spasms, twitching, or hemifacial spasm with left-sided laterality. If the note does not specify laterality, check documentation.
Do not use for
Do not use this code for facial weakness, generalized muscle spasms, or twitching without a documented hemifacial spasm diagnosis. Do not assume left-sided involvement unless it is explicitly stated.
Coding tip
Verify both the diagnosis and laterality in the assessment or impression before assigning G51.32.