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I48.91

✓ Billable

Unspecified atrial fibrillation

Diseases of the circulatory system (I00-I99)

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✅ No additional coding notes for I48.91

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Code Information

CodeI48.91
BillableYes
ParentI48.9
CategoryDiseases of the circulatory system (I00-I99)
Excludes10 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)