Bangkok Christian Hospital recommends Dr.Thaweechai for spine surgery.Does somebody know him.I actually intend to see Dr.Wicharn when I come to Bangkok.

I don't know anything and the Bkk Christian website is thoroughly unilluminating, it's one of the poorer hospital websites in that regard.

From my experience -- no reflection on this particular doctor or hospital, just in general -- it is seldom wise to ask a hospital to recommend a specialist. At best they tend to recommend based on availability/convenience (whomever has the most openings in their schedule) and at worst I've seen some spectacular mismatches. The people who handle the email traffic are usually clerical, not medical, personnel.