https://en.wikipedia.org/wiki/American_College_of_Obstetricians_and_Gynecologists
American College of Obstetricians and Gynecologists is a professional association of physicians specializing in obstetrics and gynecology in the United States. It is a 501(c)(3) organization with a membership of approximately 58,000 obstetrician-gynecologists and women's health care professionals. It was founded in 1951. A companion 501(c)(6) organization, the American Congress of Obstetricians and Gynecologists (ACOG), was founded in 2008 and became operational in 2010.[1] The two organizations coexist, and member individuals automatically belong to both.[2] Both are not-for-profit.[2] The College as a 501(c)(3) focuses on education (with limited political work), whereas the Congress as a 501(c)(6) is allowed to advocate for members' interests in terms of the business of medicine (BOM) through lobbying and other political work.[2] Physician members are referred to as fellows and use the post-nominal letters FACOG to indicate their status. To become a fellow, a candidate must become certified by the American Board of Obstetrics and Gynecology,[3] an independent organization, and then nominated to the College by another fellow.