phatmax, I'm NOT a doctor but, I recommend you do a Google Search for "liver cleanse" and "gall-stones". There's a world of information out there which may(I said MAY) not require surgery.
As for the hospitals, my wife is a nurse at Udon Hospital - this is a government run facility, AEK, Paulo, Pirot and Watana are all private hospitals in the area. There's another government hospital at the South end of town, hwy 2 just past the Air Force Base entrance and same side of road.
Since all my medical visits are free if I use a government facility, that's what I do and I'm happy with my results. You might get more 'personal' treatment at any of the private hospitals but you will pay accordingly. Also, be aware, there are a limited number of specialized doctors in Udon and they all seem to conduct business at any and all the hospitals at various times.
Lastly, second opinions are also recommended.
Best of luck,
