ICD-10 Code I48.19 – Other persistent atrial fibrillation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I48.19 – Other persistent atrial fibrillation
What it is
I48.19 identifies atrial fibrillation that lasts longer than seven days and is not labeled as permanent. Use it when the rhythm is ongoing and the provider documents another persistent form of atrial fibrillation.
Clinical signs
Clinical features vary; refer to documentation. Common findings include an irregularly irregular pulse, palpitations, fatigue, dyspnea, or reduced exercise tolerance, but the diagnosis should be supported by the provider’s documented rhythm assessment.
When to use this code
Use I48.19 when the record clearly states other persistent atrial fibrillation, persistent AF, or a similar documented variant that is not specified as permanent. Choose this code for encounters focused on management, monitoring, or evaluation of the ongoing arrhythmia. Check documentation if the provider uses conflicting terms.
Do not use for
Do not use this code for paroxysmal, chronic, or permanent atrial fibrillation unless the documentation specifically supports I48.19. If the type is unclear, check documentation rather than assuming persistent AF.
Coding tip
Match the code to the exact AF type documented, because atrial fibrillation categories are not interchangeable.