ICD-10-CM > S00-T88 > T36-T50 > T43 > T43.5 > T43.50 > T43.504 T43.504 Poisoning by unspecified antipsychotics and neuroleptics, undetermined Non-Billable/Non-Specific Codes T43.504A..., initial encounterT43.504D..., subsequent encounterT43.504S..., sequela