Clonic hemifacial spasm, bilateral

This code describes a neurological condition characterized by involuntary, repetitive, and rhythmic muscle contractions affecting both sides of the face. These spasms are typically brief and involve muscles innervated by the facial nerve, presenting as a clonic (jerking) movement.

Use this code when documentation clearly indicates bilateral clonic hemifacial spasms. This diagnosis is often made based on clinical observation and patient history, differentiating it from other facial movement disorders. Ensure the physician's notes specify the clonic nature and bilateral involvement.

• Differentiate from tonic hemifacial spasm, which involves sustained muscle contraction.
• Confirm bilateral involvement; unilateral hemifacial spasm would be coded differently.
• Review documentation for the underlying cause if known, as an additional code may be necessary.