ICD-10-CM > S00-T88 > T36-T50 > T43 > T43.3 > T43.3X > T43.3X4 T43.3X4 Poisoning by phenothiazine antipsychotics and neuroleptics, undetermined Non-Billable/Non-Specific Codes T43.3X4A..., initial encounterT43.3X4D..., subsequent encounterT43.3X4S..., sequela