state of alaska aetna coverage for lap band?

I have considered lap band surgery, as my ideal weight is 122 and I now weigh 224. I never had a weight problem until about 40, after I had a full hystorecomy at 38 years of age. On one of the chat lines a member stated that the state of alaska aetna paid her claim for lap band, however, when I read their coverage booklet it stated that they don't cover lap band. How did you get them to approve the claim? The other question is what is the difference in cost for the surgery in having it done in Alaska, Washington or Mexico? Does anyone know? aklavenderlady