ICD-10-CM > S00-T88 > T36-T50 > T42 > T42.8 > T42.8X > T42.8X5 T42.8X5 Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants Non-Billable/Non-Specific Codes T42.8X5A..., initial encounterT42.8X5D..., subsequent encounterT42.8X5S..., sequela