ICD-10 Code I46.2 – Cardiac arrest due to underlying cardiac condition (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I46.2 – Cardiac arrest due to underlying cardiac condition
What it is
This code identifies a cardiac arrest that is attributed to an underlying heart disease or cardiac disorder. Use it when the arrest is documented as caused by a cardiac condition rather than an external event.
Clinical signs
Clinical features include sudden loss of effective circulation, collapse, and absence of pulse or responsiveness. The underlying cardiac cause should be supported in the record; if unclear, check documentation.
When to use this code
Use I46.2 when the provider documents cardiac arrest and states it is due to a cardiac condition such as a structural or rhythm-related heart disorder. It is appropriate when the arrest is not primarily due to trauma, poisoning, or another noncardiac cause. Code the documented underlying condition separately when instructed by the record and coding guidelines.
Do not use for
Do not use this code for cardiac arrest with an unspecified cause or when the arrest results from an external or noncardiac event. Check documentation if the record does not clearly link the arrest to an underlying cardiac condition.
Coding tip
Assign I46.2 only when the provider explicitly connects the arrest to a cardiac cause, and code the underlying heart condition when documented.