ICD-10-CM > S00-T88 > T36-T50 > T39 > T39.1 > T39.1X > T39.1X4 T39.1X4 Poisoning by 4-Aminophenol derivatives, undetermined Non-Billable/Non-Specific Codes T39.1X4A..., initial encounterT39.1X4D..., subsequent encounterT39.1X4S..., sequela