ICD-10-CM > S00-T88 > T36-T50 > T46 > T46.2 > T46.2X > T46.2X4 T46.2X4 Poisoning by other antidysrhythmic drugs, undetermined Non-Billable/Non-Specific Codes T46.2X4A..., initial encounterT46.2X4D..., subsequent encounterT46.2X4S..., sequela