T46.1Poisoning by, adverse effect of and underdosing of calcium-channel blockers

T46.1 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of calcium-channel blockers. 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 1 subcodes must be used instead.

Within T46 (poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system), T46.1 is specifically for poisoning by, adverse effect of and underdosing of calcium-channel blockers. Related codes cover cardiac-stimulant glycosides and drugs of similar action (T46.0), other antidysrhythmic drugs, not elsewhere classified (T46.2), coronary vasodilators (T46.3), angiotensin-converting-enzyme inhibitors (T46.4), other antihypertensive drugs (T46.5), antihyperlipidemic and antiarteriosclerotic drugs (T46.6), peripheral vasodilators (T46.7), antivaricose drugs, including sclerosing agents (T46.8) and 1 more.

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.