Atrial Fibrillation ICD-10-CM Codes

Learn about the crucial atrial fibrillation ICD codes, clinical descriptions, billability, synonyms, and get answers to FAQs in our guide.

By Matt Olivares on Aug 8, 2025.

Fact Checked by Karina Jimenea.

Use Code

What ICD-10 codes are used for atrial fibrillation?

The categorization of atrial fibrillation, an irregular and often rapid heart rate, involves a variety of atrial fibrillation ICD codes. Here are some commonly used ones to report atrial fibrillation once there is a confirmed diagnosis:

I48.0: Paroxysmal atrial fibrillation: This code refers to AF that begins suddenly and ends spontaneously.
I48.20: Chronic atrial fibrillation, unspecified: This code describes continuous and ongoing AF over a long period.
I‍48.11 - Longstanding persistent atrial fibrillation. This code can be used for longstanding persistent atrial fibrillation.
I48.19 - Other persistent atrial fibrillation. This code can be used for more specific types of persistent atrial fibrillation that have no specific ICD code.
I48.91 - Unspecified atrial fibrillation: This is used when the type of AF is not specified in the patient's medical record.

Please note that none of these can be used for ventricular fibrillation or ventricular failure.

Which atrial fibrillation ICD codes are billable?

A brief overview of the billable ICD-10 codes for AF are:

I48.0 - Yes, this code is billable.
I48.20- Yes, this code is billable.
‍I‍48.11 - Yes, this code is billable.
I48.19 - Yes, this code is billable.
I48.91 - Yes, this code is billable.

Clinical information

Atrial fibrillation (AF) is the most common irregular heartbeat, causing a rapid and irregular rhythm. It is representative of a potential underlying heart disease, but it can also be representative of a potential thyroid disease. Below is some in-depth clinical information:

In AF, the heart's two upper chambers (the atria) beat chaotically and irregularly out of coordination with the two lower chambers (the ventricles). This can lead to blood clot formation, stroke, heart failure, and other heart-related complications. Anterior fascicular block and posterior fascicular block can contribute to making this worse.
Symptoms may include heart palpitations, shortness of breath, and weakness. However, some people diagnosed with atrial fibrillation have no symptoms and are unaware of their condition until it's discovered during a physical examination.
Treatment strategies for AF focus on resetting the heart's normal rhythm (like through electrical cardioversion) and preventing blood clots, which can reduce stroke risk. The best plan for you will depend on the duration of your atrial fibrillation, the severity of your symptoms, and the underlying cause of your atrial fibrillation. The last resort is cardiac surgery.

Synonyms include

AF
Afib
Atrial flutter
Paroxysmal atrial fibrillation
Chronic atrial fibrillation
Persistent atrial fibrillation
Typical atrial flutter
Atypical atrial flutter
Longstanding persistent atrial fibrillation
Chronic persistent atrial fibrillation
Atrial fibrillation and flutter
Paroxysmal tachycardia
Other persistent atrial fibrillation

Popular search terms for atrial fibrillation ICD 10 codes

Atrial fibrillation ICD-10 codes
ICD-10 atrial fibrillation
Atrial fibrillation diagnosis codes
ICD-10 codes for atrial fibrillation

Commonly asked questions

Numerous factors, such as high blood pressure, heart attack, coronary artery disease, abnormal heart valves, or any form of heart disease, can cause atrial fibrillation.

While there's no guaranteed cure for AF, current treatments, including medication, medical procedures, and lifestyle changes, can help control symptoms and manage the condition effectively.

If not well-managed, atrial fibrillation can potentially lead to severe complications like stroke and heart failure. However, with appropriate treatment and lifestyle adjustments, individuals with AF can lead everyday, healthy lives.

EHR and practice management software

Get started for free

*No credit card required

Start for free

Free

$0/usd

Unlimited clients

Telehealth

1GB of storage

Client portal text

Automated billing and online payments