2027 ICD-10-CM Diagnosis Code I46Cardiac arrest

ICD-10-CM Codes›I00–I99›I30-I5A›I46

ICD-10-CM I46
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Cardiac arrest
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I46: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On I46 itself
  • cardiogenic shock (R57.0)
From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I46, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming I46: they are not reported together with it, unless the two conditions are unrelated.

Excludes2 1

These codes carry an Excludes2 note naming I46: its condition is not part of those codes, and both may be reported when the patient has both.

Clinical InformationClinical

  • Heart Arrest

    cessation of heart beat or myocardial contraction. if it is treated within a few minutes, heart arrest can be reversed in most cases to normal cardiac rhythm and effective circulation.

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 cardiopulmonary resuscitation (CPR) and 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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I46Overview

What is the ICD-10 code for cardiac arrest?

I46 is the ICD-10-CM category for cardiac arrest, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.