I46.2
BillableCardiac arrest due to underlying cardiac condition
HCC Category Mapping
V28HCC 213 — Cardio-Respiratory Failure and Shock
0.000V24HCC 84 — Cardio-Respiratory Failure and Shock
0.402ESRDHCC 84 — Cardio-Respiratory Failure and Shock
0.000What This Code Means
The heart suddenly stops beating effectively due to an underlying heart disease or condition.
Coding Tips
- •This code requires documentation of the underlying cardiac condition; code that condition separately
- •Common underlying conditions include myocardial infarction, cardiomyopathy, or arrhythmias
Clinical Significance
Cardiac arrest due to underlying cardiac condition represents the most severe outcome of cardiac disease — sudden cessation of heart function. This is a critical, life-threatening event requiring immediate resuscitation. When documented as an active problem, it reflects extremely high acuity and resource utilization. It must be linked to the underlying cardiac cause.
Documentation Requirements
- ✓Provider documentation of cardiac arrest with cardiac etiology
- ✓Underlying cardiac condition identified and documented
- ✓Circumstances of the arrest (in-hospital vs out-of-hospital)
- ✓Resuscitation details and outcome
- ✓Post-arrest care and neurological status assessment
Code First
- underlying cardiac condition
Commonly Confused Codes
I46.8 — Cardiac arrest due to other underlying condition; for non-cardiac causesI46.9 — Cardiac arrest, cause unspecified; use when the cause cannot be determinedI49.01 — Ventricular fibrillation; the arrhythmia that often causes cardiac arrest, not the arrest itselfI21.9 — Acute myocardial infarction, unspecified; may be the underlying cause but is a separate code
Code Hierarchy
└I46Cardiac arrest└I46.2Cardiac arrest due to underlying cardiac condition
└I46.2Cardiac arrest due to underlying cardiac condition