ICD-10 Code for Atrial Fibrillation: The FY2026 I48 Coding and Denial Guide
The ICD-10 code for atrial fibrillation is I48.91 when the provider documents AFib without specifying the type. Nine billable codes sit in the I48 family, and choosing the wrong one costs you a CC on inpatient claims or a denial on outpatient ones. That number catches most billing teams off guard. Six codes cover fibrillation, […]
