Cardiac arrest (I46) ICD-10-CM
The I46 code range covers cardiac arrest with 4 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- cardiogenic shock R57.0
Codes in the I46 Range 4 codes · 3 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I46 range.
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.
About the I46 Code Range
Cardiac arrest means the heart stops beating or contracting.
The subdivisions distinguish the stated cause. I46.2 identifies an underlying heart condition, while I46.8 identifies another underlying condition. I46.9 applies when the cause is unspecified.
Questions About This Page
How many billable codes are in the I46 range?
Of the 4 codes in this range, 3 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the I46 range classify?
The range classifies cardiac arrest. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
