T46.90Poisoning by, adverse effect of and underdosing of unspecified agents primarily affecting the cardiovascular system

T46.90 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of unspecified agents primarily affecting the cardiovascular system. It belongs to category T46 (poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system), 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 T46.9, choose T46.90 (unspecified agents primarily affecting the cardiovascular system) only when documentation doesn't support a more specific option: other agents primarily affecting the cardiovascular system (T46.99).

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 has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.