Best hospital for baby surgery, please?

Hello, we are consibering to fly from Bali where we live to Bangkok as our 13-months baby boy has an issue that requiers a minor surgery (cryptorchidism). If you've had a similar experience, would you please advise a hospital that is reliable OR at least a great pediatrician that I can contact first and get further directions?
Thanks a lot!

In my opinion and some friends tell me. You can go to Christian Bangkok Hospital. My 2nd son born there and control until now in that hospital. Best .. if you can talk in Indonesian little thats good for me hehehe