T46.90Header code — not billable

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

Short description: Unsp agents primarily affecting the cardiovascular system

Chapter
19. Injury, poisoning and certain other consequences of external causes
Category
T46
Effective date
October 1, 2026

Related codes in category T46

T46Agents primarily affecting the cardiovascular systemT46.0Cardi-stim glycos/drug simlar actT46.0XCardi-stim glycos/drug simlar actT46.0X1Poisoning by cardi-stim glycos/drug simlar act, accidentalT46.0X1APoisoning by cardi-stim glycos/drug simlar act, acc, initYesT46.0X1DPoisoning by cardi-stim glycos/drug simlar act, acc, subsYesT46.0X1SPoisn by cardi-stim glycos/drug simlar act, acc, sequelaYesT46.0X2Poisoning by cardi-stim glycos/drug simlar act, self-harmT46.0X2APoisn by cardi-stim glycos/drug simlar act, self-harm, initYesT46.0X2DPoisn by cardi-stim glycos/drug simlar act, self-harm, subsYesT46.0X2SPoisn by cardi-stim glycos/drug simlar act, slf-hrm, sequelaYesT46.0X3Poisoning by cardi-stim glycos/drug simlar act, assault

Frequently asked questions

What is ICD-10 code T46.90?

T46.90 is an ICD-10-CM diagnosis code for Poisoning by, adverse effect of and underdosing of unspecified agents primarily affecting the cardiovascular system.

Is T46.90 a billable code?

No. T46.90 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is T46.90 in?

T46.90 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.

When did T46.90 become effective?

T46.90 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to T46.90?

T46.90 belongs to category T46, which includes 12 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.