ICD-10-CM > S00-T88 > T36-T50 > T46 > T46.3 > T46.3X > T46.3X4 T46.3X4 Poisoning by coronary vasodilators, undetermined Non-Billable/Non-Specific Codes T46.3X4A..., initial encounterT46.3X4D..., subsequent encounterT46.3X4S..., sequela