You will want to know that your doctor is experienced and qualified to perform hair transplant surgery. Surgeons have taken specialist postgraduate training and passed exams given by a national board of surgeons.  Suitably qualified surgeons will have the letters F.R.C.S., followed by the jurisdiction (i.e. F.R.C.S.Irl), after their name to indicate that they are a Fellow of the Royal College of Surgeons and have passed a review by surgeons of their surgical practices.