We help the world breathe.

The American Thoracic Society improves global health by advancing research, patient care, and public health in pulmonary disease, critical illness, and sleep disorders.

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Transforming patient care

Transforming patient care
133 countries - one ATS community

133 countries - one ATS community
Impacting Global Health

Impacting global health
Leading scientific discoveries.

Leading scientific discoveries
Advancing professional development

Advancing professional development

Advancing Professional Development

Early Bird Registration Is Open for ATS 2025!

Join us for the latest research, clinical insights, and presentations from pulmonary, critical care, and sleep professionals. ATS members save the most on registration—enhance your ATS 2025 experience with a membership!

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Get Involved

Join an Assembly or Section

Learn about our 14 Assemblies and 3 Sections and get involved.

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ATS Codes of Conduct

Learn about our Codes of Conduct and how to report concerns.

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Get Involved in Committees

Sign Up for ATS & Assembly Committees

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ATS Ed+

Enrich your clinical knowledge and competence, learn from the experts at your own pace, and find relevant opportunities to earn CME/MOC.

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Join MECOR (International)

ATS provides Methods in Epidemiological, Clinical and Operations Research (MECOR) in Africa, China, India, Southeast Asia, Latin America, and Turkiye.

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Join Us


When you become a member of our global American Thoracic Society community of 16,000+ health care providers and researchers, you’ll have access to:

+ Cutting-Edge science through ATS journals and publications.

+ Discounts on the Annual ATS International Conference, CME, and ATS Ed+ products.

+ A robust, collaborative online medical community of peers in our ATS DocMatter Community.

Become a Member

Advance respiratory health globally with a donation

Every gift matters in the fight against respiratory disease, and helps the next generation. The ATS is committed to your professional growth and the advancement of thoracic medicine. Lend a hand, and together, we can create a world where every breath is a testament to progress in research, pulmonary, critical care, and sleep medicine.
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