Fellow of the American College of Surgeons, often listed as "FACS", is a post-nominal title used to indicate that the surgeon's education and training, professional qualifications, surgical competence, and ethical conduct have passed a rigorous evaluation, and have been found to be consistent with the high standards established and demanded by said College. In order to apply for membership, a surgeon typically must be certified by a member board of the American Board of Medical Specialties.
Fellow of the American Society of Colon & Rectal Surgeons
Often listed as FASCRS is the premier society of colon and rectal surgeons and other surgeons dedicated to advancing and promoting the science and practice of treatment of patients with diseases and disorders affecting the rectum, colon and anus.
References
Fellow of the American College of Surgeons Wikipedia(Text) CC BY-SA