ICD-10-CM > G00-G99 > G50-G59 > G51 > G51.3 G51.3 Clonic hemifacial spasm Non-Billable/Non-Specific Codes G51.31Clonic hemifacial spasm, rightG51.32Clonic hemifacial spasm, leftG51.33Clonic hemifacial spasm, bilateralG51.39Clonic hemifacial spasm, unspecified