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I48 Atrial fibrillation and flutter

ICD-10-CM category I48 sits in Chapter 9 (Diseases of the circulatory system, I00-I99). It contains 9 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

I48.1 Persistent atrial fibrillationI48.2 Chronic atrial fibrillationI48.9 Unspecified atrial fibrillation and atrial flutter

Billable codes in I48

CodeDescription
I48.0Paroxysmal atrial fibrillation
I48.11Longstanding persistent atrial fibrillation
I48.19Other persistent atrial fibrillation
I48.20Chronic atrial fibrillation, unspecified
I48.21Permanent atrial fibrillation
I48.3Typical atrial flutter
I48.4Atypical atrial flutter
I48.91Unspecified atrial fibrillation
I48.92Unspecified atrial flutter

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