He has been treating my child for four years now. She has some very unusual gastrointestinal complaints related to other problems that she has, and it has not been easy to diagnose her. But Dr. Tan never gives up. He listens, does not mind if you ask him any number of questions, and if he is out of ideas himself, he's not too proud to go and ask senior colleagues in the practice if they have any. He is young, and he's already a very, very good gastroenterologist. In future years, I think he'll be a truly great one. I would recommend him without reservation.