Is It Okay to Ask Two Surgeons to Work on You for Two Different Surgeries at the Same Day in OR?

No this is not an unreasonable request.  It will be easier if the doctors work in the same group.  It would be slightly more difficult to organize if the doctors work in different practices.

Dr. ES

   There are many surgeons who can perform the breast lift and the Brazilian buttlift at the same time and give great results.  The same surgeon could likely give you a break on the surgeon fees as well. 

I understand your problem, because I am a Board certified Plastic Surgeon, and I do not do BBL. Just because a surgeon is board certified, does not mean he does every procedure, and in fact it might be better to find someone who is semi specialized in the procedure you want. If you can find a surgeon that does BBL, then he is probably capable of doing a mastopexy, but the reverse may not be true.

There is nothing wrong with two separate procedures if you cannot make arrangements to get them done at the same time.