american college of surgeons american college of surgeons the american college of surgeons is an educational association of surgeons created in 1913. american college of surgeonsabbreviationacs or acosformationnovember 25, 1912 (1912-11-25)typeprofessional associationtax id no. 36-2192800legal status501(c)(3)headquarterschicago, illinoislocationunited statesmembership (2023) 84,000official language englishpresident, board of regentsjulie a. freischlag, md, facs, frcsed(hon), dfsvschair, board of regentsanton n. sidawy, md, facsexecutive directorpatricia l. turnersubsidiariesamerican college of surgeons prof assoc, acspa surgeons pac, american college of surgeons foundation, surgeons asset management, acs east ontario llcrevenue (2014) $108,526,895expenses (2014)$83,866,437endowment$231,379,060employees (2013) 375volunteers (2013) 250websitewww.facs.org