ICD-10-CM > S00-T88 > T36-T50 > T42 > T42.5 > T42.5X > T42.5X4 T42.5X4 Poisoning by mixed antiepileptics, undetermined Non-Billable/Non-Specific Codes T42.5X4A..., initial encounterT42.5X4D..., subsequent encounterT42.5X4S..., sequela