ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.6 > T40.60 > T40.601 T40.601 Poisoning by unspecified narcotics, accidental (unintentional) Non-Billable/Non-Specific Applicable To Poisoning by narcotics NOS Codes T40.601A..., initial encounterT40.601D..., subsequent encounterT40.601S..., sequela