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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 15,892 ATS members (as of January 14, 2022) 14,976 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) 1296 1979 3275 1801 703 1474 45.01%
Behavioral Science & Health Services Research (BSHSR) 296 661 957 774 263 183 19.12
Clinical Problems (CP) 2444 2797 5241 3323 1492 1918 36.60%
Critical Care (CC) 3882 3012 6894 5464 3247 1430 20.74%
Environmental, Occupational and Population Health (EOPH) 470 807 1277 862 330 415 32.50%
Nursing (NUR) 127 66 193 169 114 24 12.44%
Pediatrics (PEDS) 1266 466 1732 1291 950 441 25.46%
Pulmonary Circulation (PC) 857 1682 2539 1870 601 669 26.35%
Pulmonary Infections and Tuberculosis (PI-TB) 1012 2178 3190 1781 492 1409 44.17%
Pulmonary Rehabilitation  (PR) 264 648 912 421 104 491 53.84%
Respiratory Cell and Molecular Biology (RCMB) 947 1553 2500 1650 633 850 34.00%
Respiratory Structure and Function (RSF) 827 1947 2774 1775 483 999 36.01%
Sleep and Respiratory Neurobiology (SRN) 666 1084 1750 1053 395 697 39.83%
Thoracic Oncology 622 883 1505 975 408 530 35.22%
Genetics & Genomics (GG): 1294 members
Medical Education (Med Ed) 3077 members
Terrorism & Inhalation Disasters (TID) 529 members
Members with NO Assembly Affiliation 916 members