T40.5X6Non-Billable (Header)Underdosing of cocaineCode Hierarchy└T40Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]└T40.5Poisoning by, adverse effect of and underdosing of cocaine└T40.5XPoisoning by, adverse effect of and underdosing of cocaine└T40.5X6Underdosing of cocaine└T40.5X6Underdosing of cocaine