Noki,
Sorry to say but depending on who your provider is 2 months time may be inadequate time to qualify for the procedure. A for instance, some insurance providers require a 3-6 month supervised diet for example.
However, if you are fortunate enough to not have to deal with that stickler, let your dr know on your very first meeting the urgency to get through all your education, tests etc and allot enough time for approval. This means you need to be prepared to commit to a open schedule so you can get labs, nutrition counseling, and tests (ranging from sleep studies, psych consult, cardiac test etc whatever your insur. and dr. requires). I hope this helps. Unfortunately your dr has to take the lead because every dr and insur. provider require different results so it would be unfair to advise you to get a, b, and c tests ahead of time.