ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.9 > T40.99 T40.99 Poisoning by, adverse effect of and underdosing of other psychodysleptics [hallucinogens] Non-Billable/Non-Specific Codes T40.991Poisoning by other psychodysleptics [hallucinogens], accidental (unintentional)T40.991A..., initial encounterT40.991D..., subsequent encounterT40.991S..., sequelaT40.992Poisoning by other psychodysleptics [hallucinogens], intentional self-harmT40.992A..., initial encounterT40.992D..., subsequent encounterT40.992S..., sequelaT40.993Poisoning by other psychodysleptics [hallucinogens], assaultT40.993A..., initial encounterT40.993D..., subsequent encounterT40.993S..., sequelaT40.994Poisoning by other psychodysleptics [hallucinogens], undeterminedT40.994A..., initial encounterT40.994D..., subsequent encounterT40.994S..., sequelaT40.995Adverse effect of other psychodysleptics [hallucinogens]T40.995A..., initial encounterT40.995D..., subsequent encounterT40.995S..., sequelaT40.996Underdosing of other psychodysleptics [hallucinogens]T40.996A..., initial encounterT40.996D..., subsequent encounterT40.996S..., sequela