ICD-10-CM > S00-T88 > T36-T50 > T44 > T44.6 > T44.6X > T44.6X4 T44.6X4 Poisoning by alpha-adrenoreceptor antagonists, undetermined Non-Billable/Non-Specific Codes T44.6X4A..., initial encounterT44.6X4D..., subsequent encounterT44.6X4S..., sequela