I have Tricare standard (North). If I look in the benefits section online, it said I had to complete a six month diet. But when I went to the doctor seminar, they said I didn't. I didn't want to take a chance of going through the process and getting to approval time for them (insurance) to say "now you need a 6 month diet". so i went ahead and saw my GP doctor monthly as I waited on my first appointment with the surgeon, through all the testing and dietian, psych appointments....that way when it was submitted for approval I already had complted 4 months of the diet. Worst case senerio I would be delayed 2 months. All this being said, tricare didn't require it and the doctors office was actually correct. I was worried because I am only 36 BMI but I do have 2 comorbidities.----I would suggest you call the insurance person at the surgeons office. They work with the insurance companies so much, they usually know what is expected.