Documentation Tip of the Week: Atrial Fibrillation and Atrial Flutter for ICD-10

Posted on Wed, Aug 12, 2015
Documentation Tip of the Week: Atrial Fibrillation and Atrial Flutter for ICD-10

Our weekly feature of documentation tips for clinicians.

By Timothy Brundage, MD

Atrial Fibrillation Definitions:

  • Paroxysmal A. Fib: Terminates within 7 days
  • Persistent A. Fib: Sustained > 7 days and is subject to rhythm control (e.g. metoprolol, flecanide, amiodarone) to maintain NSR
    • This is a Comorbid Condition (CC) and demonstrates Severity of Illness (SOI)
  • Permanent (chronic) A. Fib: NSR cannot be sustained and physician/patient cease further attempts to maintain NSR
  • History of Atrial Fibrillation: A. Fib in the past but now NSR and taking no medication to maintain NSR
ICD-10 Code Description CC or MCC

ICD-10 Codes for A Fib


I48.0 Paroxysmal atrial fibrillation --
I48.1 Persistent atrial fibrillation CC
I48.2 Chronic atrial fibrillation --
I48.91 Unspecified atrial fibrillation --
I18.3 Typical Atrial Flutter CC
I48.4 Atypical Atrial Flutter CC
I48.92 Unspecified Atrial Flutter CC

Timothy Brundage
Timothy Brundage, MD, is a hospitalist for EmCare at St. Petersburg General Hospital in St. Petersburg, Fla. Dr. Brundage earned his bachelor’s degree in chemistry and molecular biology at the University of Michigan, his medical degree at the Wayne State University School of Medicine and completed his residency in internal medicine at the University of South Florida College of Medicine. Subscribe to Dr. Brundage’s weekly documentation tips or ask him about specific documentation issues by emailing him at

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