ICD-10-CM > S00-T88 > T36-T50 > T43 > T43.5 > T43.59 > T43.594 T43.594 Poisoning by other antipsychotics and neuroleptics, undetermined Non-Billable/Non-Specific Codes T43.594A..., initial encounterT43.594D..., subsequent encounterT43.594S..., sequela