There are quite a few clinics now that advertise same day surgery, but it probably depends on your other health and risk factors which the Dr. can determine during the evaluation visit. Also, if your surgery is in the afternoon, depending on your recovery time from anesthesia, it may be too late in the day to find a doctor to clear you for discharge and get all the hospital business office paperwork done. The advantage to staying overnight is that you keep getting the IV drip pain killers and antibiotics a little longer as well the chance to ask questions of nursing staff if you feel uneasy about something.