Chiari Malformation Type I
Chiari Malformation Type I is indexed under Neurological & Neurodegenerative, Structural Neurological. Also known as Chiari I, Arnold-Chiari malformation.
- US prevalence
- ~1 in 1,000 on imaging; symptomatic less common Source: AANS; Conquer Chiari. This figure comes from a professional society, registry, or study rather than a federal source. Label: REPORTED.
- ICD-10-CM codes
- Q07.0
- Typical onset
- Symptoms often 20-40; incidental finding any age
- Course
- managed
- Body systems
- neurological
- Sex differences
- F:M ~3:1 for symptomatic
- Racial and ethnic differences
- Limited data
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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