ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.2 > T40.2X > T40.2X4 T40.2X4 Poisoning by other opioids, undetermined Non-Billable/Non-Specific Codes T40.2X4A..., initial encounterT40.2X4D..., subsequent encounterT40.2X4S..., sequela