I48.20: Chronic atrial fibrillation, unspecified
I48.20 is the billable ICD-10-CM diagnosis code for Chronic atrial fibrillation, unspecified. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code I48.20?
I48.20 is the ICD-10-CM diagnosis code for Chronic atrial fibrillation, unspecified. It belongs to category I48 (Atrial fibrillation and flutter).
Is I48.20 a billable code?
Yes. I48.20 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does I48.20 belong to?
I48.20 is part of ICD-10-CM category I48 — Atrial fibrillation and flutter, which has 18 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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