ICD-10-CM > S00-T88 > T36-T50 > T38 > T38.9 > T38.99 > T38.991 T38.991 Poisoning by other hormone antagonists, accidental (unintentional) Non-Billable/Non-Specific Applicable To Poisoning by other hormone antagonists NOS Codes T38.991A..., initial encounterT38.991D..., subsequent encounterT38.991S..., sequela