T46 — Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system
T46 is a non-billable header ICD-10-CM code for poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category T46
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- poisoning by, adverse effect of and underdosing of metaraminol (T44.4)
Other codes that can never be billed with T46
These codes carry an Excludes1 note pointing at T46. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T46 alone.
Risk adjustment
T46 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead T46
10 child codes. Green means billable.
- T46.0Poisoning by, adverse effect of and underdosing of cardiac-stimulant glycosides and drugs of similar action
- T46.1Poisoning by, adverse effect of and underdosing of calcium-channel blockers
- T46.2Poisoning by, adverse effect of and underdosing of other antidysrhythmic drugs, not elsewhere classified
- T46.3Poisoning by, adverse effect of and underdosing of coronary vasodilators
- T46.4Poisoning by, adverse effect of and underdosing of angiotensin-converting-enzyme inhibitors
- T46.5Poisoning by, adverse effect of and underdosing of other antihypertensive drugs
- T46.6Poisoning by, adverse effect of and underdosing of antihyperlipidemic and antiarteriosclerotic drugs
- T46.7Poisoning by, adverse effect of and underdosing of peripheral vasodilators
- T46.8Poisoning by, adverse effect of and underdosing of antivaricose drugs, including sclerosing agents
- T46.9Poisoning by, adverse effect of and underdosing of other and unspecified agents primarily affecting the cardiovascular system
Questions about T46
- Is T46 a billable ICD-10-CM code?
- No. T46 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does T46 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50).
- What cannot be coded together with T46?
- T46 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.