ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.0 > T40.0X > T40.0X1 T40.0X1 Poisoning by opium, accidental (unintentional) Non-Billable/Non-Specific Applicable To Poisoning by opium NOS Codes T40.0X1A..., initial encounterT40.0X1D..., subsequent encounterT40.0X1S..., sequela