ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.6 > T40.69 > T40.691 T40.691 Poisoning by other narcotics, accidental (unintentional) Non-Billable/Non-Specific Applicable To Poisoning by other narcotics NOS Codes T40.691A..., initial encounterT40.691D..., subsequent encounterT40.691S..., sequela