T40.71Poisoning by, adverse effect of and underdosing of cannabis (derivatives)

T40.71 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of cannabis (derivatives). It belongs to category T40 (poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]), block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within T40.7 (poisoning by, adverse effect of and underdosing of cannabis (derivatives)), T40.71 is specifically for poisoning by, adverse effect of and underdosing of cannabis (derivatives). Related codes cover synthetic cannabinoids (T40.72).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It was added in FY2022, effective October 1, 2021.