I46Header code — not billable

Cardiac arrest

Chapter
9. Diseases of the circulatory system
Category
I46
Effective date
October 1, 2026

Related codes in category I46

I46.2Cardiac arrest due to underlying cardiac conditionYesI46.8Cardiac arrest due to other underlying conditionYesI46.9Cardiac arrest, cause unspecifiedYes

Frequently asked questions

What is ICD-10 code I46?

I46 is an ICD-10-CM diagnosis code for Cardiac arrest.

Is I46 a billable code?

No. I46 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 I46 in?

I46 falls under Chapter 9: Diseases of the circulatory system.

When did I46 become effective?

I46 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to I46?

I46 belongs to category I46, which includes 3 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.