I46.8

Billable

Cardiac arrest due to other underlying condition

HCC Category Mapping

V28HCC 213 — Cardio-Respiratory Failure and Shock

0.000

V24HCC 84 — Cardio-Respiratory Failure and Shock

0.402

ESRDHCC 84 — Cardio-Respiratory Failure and Shock

0.000

What This Code Means

The heart suddenly stops beating effectively due to a non-cardiac underlying condition such as severe infection, blood clots, or respiratory failure.

Coding Tips

•Identify and code the underlying non-cardiac condition that caused the arrest
•This is used when the arrest is secondary to conditions outside the heart itself

Clinical Significance

Cardiac arrest due to other underlying condition captures cardiac arrest events caused by non-cardiac etiologies such as massive pulmonary embolism, severe sepsis, respiratory failure, or drug overdose. This distinction from cardiac-cause arrest affects treatment protocols and prognostic assessment. It represents an extreme acuity event requiring intensive resources.

Documentation Requirements

✓Provider documentation of cardiac arrest with non-cardiac underlying cause
✓Specific underlying non-cardiac condition identified and coded
✓Circumstances of the arrest and resuscitation details
✓Causal relationship between the underlying condition and the cardiac arrest
✓Post-arrest care and neurological outcome assessment

Code First

underlying condition

Commonly Confused Codes

I46.2 — Cardiac arrest due to underlying cardiac condition; for cardiac causes specifically I46.9 — Cardiac arrest, cause unspecified; for when the cause is unknown R09.2 — Respiratory arrest; different from cardiac arrest R57.0 — Cardiogenic shock; hemodynamic compromise without full arrest

Code Hierarchy

└I46Cardiac arrest └I46.8Cardiac arrest due to other underlying condition

└I46.8Cardiac arrest due to other underlying condition