Convert ICD-10 Code T40.905A to ICD-9

Source ICD-10 Code		Target ICD-9 Code
T40.905A Adverse effect of unspecified psychodysleptics, init encntr		995.29 Adv eff med/biol NEC/NOS
Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.
T40.905A Adverse effect of unspecified psychodysleptics, init encntr		E939.6 Adv eff hallucinogens
Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.

ICD-10 to ICD-9 crosswalk for code T40.905A - adverse effect of unspecified psychodysleptics [hallucinogens], initial encounter based on the most recent General Equivalence Mappings (GEMS) information.