ICD-10-CM > S00-T88 > T36-T50 > T48 > T48.2 > T48.20 > T48.204 T48.204 Poisoning by unspecified drugs acting on muscles, undetermined Non-Billable/Non-Specific Codes T48.204A..., initial encounterT48.204D..., subsequent encounterT48.204S..., sequela