ICD-10-CM Code I48.1

Persistent atrial fibrillation

Version 2020 Replaced Code Non-Billable Code Cardiology

Not Valid for Submission

I48.1 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of persistent atrial fibrillation. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

The code is commonly used in cardiology medical specialties to specify clinical concepts such as atrial fibrillation and flutter.

ICD-10:I48.1
Short Description:Persistent atrial fibrillation
Long Description:Persistent atrial fibrillation

Consider the following ICD-10 codes with a higher level of specificity:

  • I48.11 - Longstanding persistent atrial fibrillation
  • I48.19 - Other persistent atrial fibrillation

Replaced Code

This code was replaced in the 2020 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2019. This code was replaced for the FY 2020 (October 1, 2019 - September 30, 2020).

  • I48.11 - Longstanding persistent atrial fibrillation
  • I48.19 - Other persistent atrial fibrillation

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code I48.1:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Permanent atrial fibrillation I48.21

Clinical Information

  • ATRIAL FIBRILLATION-. abnormal cardiac rhythm that is characterized by rapid uncoordinated firing of electrical impulses in the upper chambers of the heart heart atria. in such case blood cannot be effectively pumped into the lower chambers of the heart heart ventricles. it is caused by abnormal impulse generation.

Convert I48.1 to ICD-9

  • 427.31 - Atrial fibrillation (Approximate Flag)

Code Classification

  • Diseases of the circulatory system (I00–I99)
    • Other forms of heart disease (I30-I52)
      • Atrial fibrillation and flutter (I48)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - Code Deleted, effective from 10/1/2019 through 9/30/2020

Information for Patients


Atrial Fibrillation

An arrhythmia is a problem with the speed or rhythm of the heartbeat. Atrial fibrillation (AF) is the most common type of arrhythmia. The cause is a disorder in the heart's electrical system.

Often, people who have AF may not even feel symptoms. But you may feel

  • Palpitations -- an abnormal rapid heartbeat
  • Shortness of breath
  • Weakness or difficulty exercising
  • Chest pain
  • Dizziness or fainting
  • Fatigue
  • Confusion

AF can lead to an increased risk of stroke. In many patients, it can also cause chest pain, heart attack, or heart failure.

Doctors diagnose AF using family and medical history, a physical exam, and a test called an electrocardiogram (EKG), which looks at the electrical waves your heart makes. Treatments include medicines and procedures to restore normal rhythm.

NIH: National Heart, Lung, and Blood Institute


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