ICD-10-CM 2027
ICD-10 code for ventricular fibrillation
From the official ICD-10-CM alphabetic index entry “Fibrillation › ventricular”. Page updated September 29, 2026.
About coding ventricular fibrillation
The ICD-10-CM code for ventricular fibrillation is I49.01 (Ventricular fibrillation).
Within I49.0 (ventricular fibrillation and flutter), I49.01 is specifically for ventricular fibrillation. Related codes cover flutter (I49.02).
Code first cardiac arrhythmia complicating: abortion or ectopic or molar pregnancy (O00-O07, O08.8) and obstetric surgery and procedures (O75.4).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about ventricular fibrillation ICD-10 codes
What is the ICD-10 code for ventricular fibrillation?
- I49.01 — Ventricular fibrillation.
Is I49.01 billable?
- Yes. I49.01 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I49.01 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I49.01 as a principal diagnosis.
Is I49.01 a CC or MCC?
- I49.01 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.