Afib ICD-10-CM Codes | 2023

Decode the significant AFIB (Atrial Fibrillation) ICD-10-CM codes for 2023 with us, including clinical data, billability, synonyms, and FAQs all in one place.

By Olivia Sayson on Aug 8, 2025.

Fact Checked by RJ Gumban.

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What ICD-10 Codes Are Used for AFIB?

AFIB, short for Atrial Fibrillation, has a variety of AFIB ICD codes used to capture its different forms. The following are some of the most common ones:

I48.0 - Paroxysmal atrial fibrillation: This code is applied for AFIB, which begins suddenly and ends spontaneously.
I48.1 - Persistent atrial fibrillation: This code is designated for AFIB that persists longer than seven days.
I48.2 - Chronic atrial fibrillation: This code refers to continuous and ongoing AFIB over an extended period.‍
I48.91 - Unspecified atrial fibrillation: This code is used when the type of AFIB is not documented in the patient's medical record.

Which AFIB ICD Codes Are Billable?

This section provides an overview of the billable status of the commonly used AFIB ICD-10 codes:

I48.0 - Yes, this code is billable and denotes instances of paroxysmal atrial fibrillation.
I48.1 - Yes, this code is billable and pertains to instances of persistent atrial fibrillation.
I48.2 - Yes, this code is billable and captures instances of chronic atrial fibrillation.
I48.91 - Yes, this code is billable and is used when the type of AFIB is not specified.

Clinical Information

Atrial Fibrillation, commonly abbreviated as AFIB, is the most frequent form of severe arrhythmia or irregular heart rhythm. Let's delve deeper into its clinical aspects:

In AFIB, the two upper chambers of the heart, the atria, beat chaotically and out of sync with the two lower chambers, the ventricles. This can result in blood clot formation, stroke, heart failure, and other heart-related complications.
AFIB symptoms can vary from heart palpitations breathlessness, and weakness. However, some people with atrial fibrillation have no symptoms and are unaware of their condition until it's discovered during a physical examination.
The main goal of AFIB treatment is resetting the heart's rhythm and preventing clot formation, which can significantly reduce the risk of stroke. Your treatment will depend on the duration of your atrial fibrillation, the severity of your symptoms, and the underlying reason for your AFIB.

Synonyms Include:

Atrial Fibrillation
Afib
Paroxysmal AFIB
Chronic AFIB
Persistent AFIB

Commonly asked questions

AFIB is typically diagnosed through a thorough review of symptoms, a physical examination, and a series of tests which may include an EKG, event recorder, Holter monitor, or echocardiogram.

Maintaining a healthy weight, regular physical activity, moderating alcohol, reducing caffeine, quitting smoking, and controlling blood pressure and cholesterol can help manage AFIB.

Yes, periods of high stress or anxiety can trigger outbreaks of AFIB. Incorporating stress-reducing activities like yoga, meditation, or other relaxation techniques into your routine is recommended.

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