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Assembly Membership

When a person becomes a member of the American Thoracic Society he or she is entitled to become a "primary member" of one Assembly and "secondary member" of two additional Assemblies.  Of the 16,249 ATS members (as of December 3, 2020) 14,917 have declared a primary Assembly.  Please see the list below for the numbers of primary members, secondary, International and primary & secondary members in each Assembly:

Assembly Primary Members Secondary Members Primary & Secondary Members Primary & Secondary
Members
(U.S. only)
Primary Members
(U.S. only)
International Members Percentage of International Members
Allergy, Immunology and Inflammation (AII) 1218 1960 3178 1789 718 1389 43.71%
Behavioral Science & Health Services Research (BSHSR) 284 582 866 693 249 173 19.98%
Clinical Problems (CP) 2545 2637 5182 3352 1559 1830 35.31%
Critical Care (CC) 3894 3077 6971 5595 3254 1376 19.74%
Enviromental, Occupational and Population Health (EOPH) 454 769 1223 837 316 386 31.56%
Nursing (NUR) 130 70 200 173 116 27 13.50%
Pediatrics (PEDS) 1235 467 1702 1243 909 459 26.97%
Pulmonary Circulation (PC) 855 1707 2562 1949 628 613 23.93%
Pulmonary Infections and Tuberculosis (PI-TB) 989 2034 3023 1765 510 1258 41.61%
Pulmonary Rehabilitation  (PR) 259 571 830 408 110 422 50.84%
Respiratory Cell and Molecular Biology (RCMB) 978 1530 2508 1658 668 850 33.89%
Respiratory Structure and Function (RSF) 817 1904 2721 1736 484 985 36.20%
Sleep and Respiratory Neurobiology (SRN) 649 1111 1760 1073 399 687 39.03%
Thoracic Oncology 610 871 1481 960 399 521 35.18%
Genetics & Genomics (GG): 1179 members
Medical Education (Med Ed) 2714 members
Terrorism & Inhalation Disasters (TID) 522 members
Members with NO Assembly Affiliation 1332 members