ICD-10-CM > S00-T88 > T36-T50 > T44 > T44.0 > T44.0X > T44.0X4 T44.0X4 Poisoning by anticholinesterase agents, undetermined Non-Billable/Non-Specific Codes T44.0X4A..., initial encounterT44.0X4D..., subsequent encounterT44.0X4S..., sequela