ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.6 > T40.60 T40.60 Poisoning by, adverse effect of and underdosing of unspecified narcotics Non-Billable/Non-Specific Codes T40.601Poisoning by unspecified narcotics, accidental (unintentional)T40.601A..., initial encounterT40.601D..., subsequent encounterT40.601S..., sequelaT40.602Poisoning by unspecified narcotics, intentional self-harmT40.602A..., initial encounterT40.602D..., subsequent encounterT40.602S..., sequelaT40.603Poisoning by unspecified narcotics, assaultT40.603A..., initial encounterT40.603D..., subsequent encounterT40.603S..., sequelaT40.604Poisoning by unspecified narcotics, undeterminedT40.604A..., initial encounterT40.604D..., subsequent encounterT40.604S..., sequelaT40.605Adverse effect of unspecified narcoticsT40.605A..., initial encounterT40.605D..., subsequent encounterT40.605S..., sequelaT40.606Underdosing of unspecified narcoticsT40.606A..., initial encounterT40.606D..., subsequent encounterT40.606S..., sequela