I was just banded August 13. From what I learned at the seminar I went to insurances companies all differ, so it is hard to say what they will require to approve you. As far as your BMI, that may be good enough for the surgeon to do the surgery but not for the insurance. I think a lot of them require other health issues or they just don't cover weight loss surgery for any reason (which was my problem). I had to refinance my house in order to pay for the surgery, but anyway you do it it's worth it!
My friend is also having the surgery done and she thought her insurance would pay for at least part of her surgery but after waiting 6 weeks her insurance denied her claim and so her only choices were to sue the insurance (who knows how long that could take!! you could gain another 100 pounds by then), pay for it herself, or just forget the whole thing. She decided just to pay for it, as she already waited for a long time. Hopefully your insurance company will be better at paying. Hope I'm not discouraging you, but it might need to be something you should think about--what are you going to do if your insurance will not pay for it?