Asthma-COPD Overlap
Asthma-COPD Overlap is indexed under Respiratory, Obstructive Lung Disease. Also known as ACO, ACOS.
- US prevalence
- ~15-20% of obstructive airway disease patients Source: GINA/GOLD. This figure comes from a professional society, registry, or study rather than a federal source. Label: REPORTED.
- ICD-10-CM codes
- J44.9, J45.9
- Typical onset
- Typically >40 with history of asthma
- Course
- progressive
- Body systems
- pulmonary
- Sex differences
- More common in women
- 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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