Atrial Fibrillation
Atrial Fibrillation is indexed under Cardiovascular, Arrhythmia. Also known as AFib, AF, atrial fibrillation and flutter.
- US prevalence
- Current U.S. prevalence not stated on the current CDC page; CDC projects 12.1 million people with AFib by 2050 Source: CDC — About Atrial Fibrillation. This figure comes from a professional society, registry, or study rather than a federal source. Label: REPORTED.
- ICD-10-CM codes
- I48, I48.0, I48.1, I48.2, I48.91
- Typical onset
- Increases sharply >65 years; median onset ~75
- Course
- episodic
- Body systems
- cardiovascular
- Sex differences
- M:F ~1.5:1; women have higher stroke risk from AFib
- Racial and ethnic differences
- Lower reported prevalence in Black and Asian Americans, possibly underdiagnosed
What this page does not establish
These figures describe populations, not individuals, and none of them is a diagnosis or a treatment recommendation. Prevalence estimates are approximate and reflect published ranges. Disparity figures are reported patterns, not causes.
Taxonomy last reviewed 2026-05-19. Each figure on the interactive page carries its own source and retrieval date, which can be later than this review.
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