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

ATS 2026 International Conference: Early Registration is Now Open

Register early for the ATS International Conference, the world’s most important respiratory medicine conference, taking place in Orlando, May 15-20.  

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Early Career Programs

Applications are open for the ATS Student Scholars Program. Fellows Track Symposium, Resident Boot Camp, and New Faculty Boot Camp during ATS 2026 in Orlando. 

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Join an Assembly or Section

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

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Our Commitment to Diversity, Equity & Inclusion

The ATS promotes diversity, equity, inclusion, accessibility, and belonging for everyone.

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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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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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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 Us


When you become a member of our global American Thoracic Society community of 30,000+ 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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