I49.01
BillableVentricular fibrillation
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
A life-threatening heart rhythm disorder where the heart's lower chambers quiver chaotically instead of beating effectively, preventing proper blood circulation.
Coding Tips
- •This is a critical emergency condition; ensure documentation clearly indicates ventricular fibrillation rather than other arrhythmias
- •Verify whether this is initial episode or recurrent, as treatment and coding context may differ
Clinical Significance
Ventricular fibrillation is a life-threatening cardiac emergency where the ventricles quiver chaotically, resulting in no effective cardiac output. This condition is the most common cause of sudden cardiac death and requires immediate defibrillation. Its capture as a chronic/historical condition reflects survivors who require ongoing management with implantable cardioverter-defibrillators and antiarrhythmic therapy.
Documentation Requirements
- ✓Clear provider documentation of ventricular fibrillation as a current or historical diagnosis
- ✓Context of the event — whether initial episode, recurrent, or history of survived cardiac arrest
- ✓Current management including implantable cardioverter-defibrillator status, antiarrhythmic medications
- ✓Underlying etiology if known (ischemic heart disease, cardiomyopathy, channelopathy)
- ✓Functional status and ongoing monitoring plan
- ✓Any associated cardiac conditions contributing to arrhythmia risk
Commonly Confused Codes
I49.02 — Ventricular flutter: more organized rapid ventricular rhythm vs the chaotic activity of fibrillationI46.9 — Cardiac arrest, cause unspecified: cardiac arrest is the clinical event; ventricular fibrillation is the underlying rhythmI47.2 — Ventricular tachycardia: organized rapid ventricular rhythm that may precede fibrillation but is a distinct arrhythmiaI49.9 — Cardiac arrhythmia, unspecified: use only when the specific arrhythmia type cannot be determinedI48.91 — Unspecified atrial fibrillation: atrial fibrillation originates in the atria, not the ventricles
Code Hierarchy
└I49Other cardiac arrhythmias└I49.0Ventricular fibrillation and flutter└I49.01Ventricular fibrillation
└I49.01Ventricular fibrillation