ICD-10-CM > S00-T88 > T36-T50 > T50 > T50.6 > T50.6X > T50.6X4 T50.6X4 Poisoning by antidotes and chelating agents, undetermined Non-Billable/Non-Specific Codes T50.6X4A..., initial encounterT50.6X4D..., subsequent encounterT50.6X4S..., sequela