Clonic hemifacial spasm, right

This code identifies an involuntary, repetitive, and rhythmic contraction of muscles on the right side of the face. These spasms are characterized by alternating contraction and relaxation (clonic movements) and are typically unilateral, affecting muscles innervated by the facial nerve.

Apply this code when documentation explicitly states a diagnosis of clonic hemifacial spasm affecting the right side of the patient's face. This diagnosis is often made based on clinical observation of the characteristic clonic movements.

• Differentiate from tonic hemifacial spasm, which involves sustained muscle contraction.
• Ensure laterality is clearly documented as "right" to support this specific code.
• Do not confuse with facial tics or blepharospasm, which have different underlying etiologies and presentations.