I48.9
Non-billableUnspecified atrial fibrillation and atrial flutter
I48.9 is the ICD-10-CM code for Unspecified atrial fibrillation and atrial flutter. It is a non-billable category code — use a more specific child code such as I48.91 for billing.
I00-I99 Diseases of the circulatory system
What this means — in plain language
MedlinePlus · NIHWhat is an arrhythmia? An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias. When your heart beats faster than normal, it's called tachycardia . When your heart beats too slowly, it's called bradycardia . When the signal to beat comes too early, it's…
Read more about Arrhythmia at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Medications indicated for this condition
FDA labeling- Sotalol›
- DofetilideAntiarrhythmic [EPC]›
- Dabigatran Etexilate›
- RivaroxabanFactor Xa Inhibitor [EPC]›
- Propafenone›
- ApixabanFactor Xa Inhibitor [EPC]›
- DigoxinCardiac Glycoside [EPC]›
- Heparin›
- Ibutilide›
- Quinidine›
- Warfarin›
- Diltiazem Hci›
Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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