I am sorry you may be facing surgery. I am also a little confused by the post so I am sorry if I my response is off so to speak.
I have not had surgery but any type of medical procedure that is not with an rsd doctor I talk to that doctor and explain my condition and the possibles that can happen with spread etc. Some doctors will say they know but they really don't so to educate them is important. So the doctor today you see I would talk to him or her about your condition. Maybe your pain doctor could also talk to the person who does the surgery. Now for the pain doctors why were you switching from the current? I don't think you should be without a pain doctor especially after the surgery. If you are switching because the current pain doctor is not good is there a way you could even do phone sessions with the out of state one?
I hope things get better