I48.9
⚠ Non-billable (Header)Unspecified atrial fibrillation and atrial flutter
Diseases of the circulatory system (I00-I99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ No additional coding notes for I48.9
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CodeI48.9
BillableNo — Header code
ParentI48
CategoryDiseases of the circulatory system (I00-I99)
Excludes10 rule(s)
Excludes20 note(s)
Child codes2
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)