FACS is a respected credential and is generally a positive sign, but it should not be the only factor you use to choose a plastic surgeon. It means the surgeon has met standards for membership in the American College of Surgeons, but it does not replace checking whether the surgeon is board-certified in plastic surgery, has strong experience with the exact procedure you want, operates in an accredited facility, and has hospital privileges. For a tummy tuck consultation, I would weigh board certification, body-contouring experience, before-and-after results on patients with similar anatomy, safety planning, revision policy, and how clearly the surgeon explains risks and options. If two surgeons seem equally strong, FACS may help tip the scale, but a non-FACS surgeon can still be an excellent choice if the other qualifications are solid.