As a member of the American Thoracic Society you may join a maximum of three assemblies one “primary Assembly” and two “secondary Assembly's”. As of October 21, 2024, 15,464 have declared a primary Assembly.
| Assembly | Primary Members | Secondary Members | Primary & Secondary Members | Primary & Secondary (U.S. Only) | Primary (U.S. Only) | International Members | Percentage of International Members |
|---|---|---|---|---|---|---|---|
| Allergy, Immunology and Inflammation (AII) | 1262 | 2135 | 3397 | 1979 | 778 | 1418 | 42% |
| Behavioral Science & Health Services Research (BSHSR) | 356 | 704 | 1060 | 852 | 320 | 208 | 20% |
| Clinical Problems (CP) | 2378 | 2880 | 5258 | 3432 | 1460 | 1826 | 35% |
| Critical Care (CC) | 3874 | 2967 | 6841 | 5500 | 3272 | 1341 | 20% |
| Enviromental, Occupational and Population Health (EOPH) | 501 | 916 | 1417 | 964 | 354 | 453 | 32% |
| Nursing (NUR) | 131 | 65 | 196 | 167 | 110 | 29 | 15% |
| Pediatrics (PEDS) | 1282 | 474 | 1756 | 1318 | 968 | 438 | 25% |
| Pulmonary Circulation (PC) | 944 | 1708 | 2652 | 2023 | 724 | 629 | 24% |
| Pulmonary Infections and Tuberculosis (Pi-TB) | 1076 | 2313 | 3389 | 1891 | 497 | 1498 | 44% |
| Pulmonary Rehabilitation (PR) | 295 | 714 | 1009 | 479 | 116 | 530 | 53% |
| Respiratory Cell and Molecular Biology (RCMB) | 1060 | 1653 | 2713 | 1842 | 742 | 871 | 32% |
| Respiratory Structure and Function (RSF) | 888 | 2128 | 3016 | 1925 | 508 | 1091 | 36% |
| Sleep and Respiratory Neurobiology (SRN) | 668 | 1067 | 1735 | 1049 | 412 | 686 | 40% |
| Thoracic Oncology | 749 | 894 | 1643 | 1065 | 483 | 578 | 35% |
| Genetics & Genomics (GG) | 1500 | ||||||
| Medical Education (Med Ed) | 3711 | ||||||
| Terrorism & Inhalation Disasters (TID) | 607 | ||||||
| Members with NO Assembly Affiliation | |||||||