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 2026, 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
About the I46 Code Range
ICD-10 code I46 is used specifically to classify instances of cardiac arrest, a sudden loss of heart function. This code and its subcodes help distinguish cardiac arrest caused by different underlying conditions or circumstances.
The category includes I46.2 for cardiac arrest due to an underlying cardiac condition, often referred to as bradycardic cardiac arrest or cardiac arrest due to cardiac disorder. Code I46.8 covers cardiac arrest resulting from other causes such as trauma, respiratory issues, electrocution, drowning, or pacemaker failure. Meanwhile, I46.9 is used when the cause of cardiac arrest is unspecified, encompassing scenarios like arrest during medical procedures, post-resuscitation events, or complications related to anesthesia or pregnancy. For medical coders seeking the ICD-10 code for cardiac arrest, these distinct codes help specify the arrest’s origin, ensuring accurate documentation and coding that reflects the clinical situation precisely.
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, 2025 through September 30, 2026. 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 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
