ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.9 > T40.90 > T40.904 T40.904 Poisoning by unspecified psychodysleptics [hallucinogens], undetermined Non-Billable/Non-Specific Codes T40.904A..., initial encounterT40.904D..., subsequent encounterT40.904S..., sequela