2026 ICD-10-CM Diagnosis Code I46Cardiac arrest

ICD-10-CM Codes›I00–I99›I30-I5A›I46

ICD-10-CM I46
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I46 is a non-billable ICD-10-CM category code for cardiac arrest, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I46.2, I46.8, and I46.9.

Code Identity

ICD-10-CM Code
I46
Billable Status
No — Non-Billable Category
Code Describes
Cardiac arrest
Chapter
I30-I5A
Other forms of heart disease

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI46Cardiac arrest
This CodeI46Cardiac arrest

Specific Coding for Cardiac arrestOverview

Non-specific codes like I46 require more characters. Use one of these billable codes instead:

  • Use I46.2 for Cardiac arrest due to underlying cardiac condition

  • Use I46.8 for Cardiac arrest due to other underlying condition

  • Use I46.9 for Cardiac arrest, cause unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 2 Excludes

  • cardiogenic shock R57.0

Patient EducationClinical

Sudden Cardiac Arrest

Sudden cardiac arrest (SCA) is a condition in which the heart suddenly stops beating. When that happens, blood stops flowing to the brain and other vital organs. If it is not treated, SCA usually causes death within minutes. But quick treatment with a defibrillator may be lifesaving.

The full article covers:

  • What is sudden cardiac arrest (SCA)?
  • How is sudden cardiac arrest (SCA) different from a heart attack?
  • What causes sudden cardiac arrest (SCA)?
  • Who is at risk for sudden cardiac arrest (SCA)?
  • What are the symptoms of sudden cardiac arrest (SCA)?
  • How is sudden cardiac arrest (SCA) diagnosed?
  • What are the treatments for sudden cardiac arrest (SCA)?
  • What should I do if I think that someone has had an SCA?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I46Overview

Is I46 (Cardiac arrest) a billable code?

No. This is a category header that groups the codes for cardiac arrest, and headers cannot be submitted on claims. Claims for cardiac arrest need a more specific code from this category, such as I46.2, I46.8, and I46.9.