The short answer
There is no single “best” bariatric surgeon in Istanbul, and no honest site can rank them for you. What you can do is compare surgeons on facts you can check: a named surgeon on the Ministry of Health’s HealthTürkiye register with a surgical specialty, a licensed hospital with the right facilities, a written itemised quote, and a clear plan for follow-up after you fly home. This guide explains each check, then lists the verified gastric sleeve surgeons in Istanbul on &NewMe, in alphabetical order and without prices.