ICD-10-CM > S00-T88 > T36-T50 > T46 > T46.5 > T46.5X > T46.5X4 T46.5X4 Poisoning by other antihypertensive drugs, undetermined Non-Billable/Non-Specific Codes T46.5X4A..., initial encounterT46.5X4D..., subsequent encounterT46.5X4S..., sequela