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I48

⚠ Non-billable (Header)

Atrial fibrillation and flutter

Diseases of the circulatory system (I00-I99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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✅ No additional coding notes for I48

Child Codes (6)

I48.0Paroxysmal atrial fibrillationI48.1Persistent atrial fibrillationI48.2Chronic atrial fibrillationI48.3Typical atrial flutterI48.4Atypical atrial flutterI48.9Unspecified atrial fibrillation and atrial flutter

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Code Information

CodeI48
BillableNo — Header code
CategoryDiseases of the circulatory system (I00-I99)
Excludes10 rule(s)
Excludes20 note(s)
Child codes6

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)