There are guidelines, and i met them. Consecutive surgeon apts and nutrition apts, tests, and medical need. I am having a band removed, a hernia fixed, and the sleeve procedure. I checked the insurance site but did not find information. I emailed the dr office, but with the holidays, may not there until the new year. I am a nervous/anxious person, so I am worried this plan and date are going all too well and some wrench is going to be thrown into the mix. It would be just my luck that I am on this preop diet and things may get delayed.