Anyone have experience with BC/BS Federal Employees Plan?

I have to have a 5 year documentation of obesity and a 6-month diet history (within the past 24 months). I was also told that they do not pre-approve this surgery, but review it when the bills are submitted and per the letter I received from BC, "Claims are reviewed for medical necessity upon receipt and any benefit determination will be based on the information received". I don't know how they get away with this, but it is a pretty scary prospect that they get to determine eligiblity AFTER the surgery is already completed. I was also planning on having the sleeve procedure, but the policy states, "Sleeve gastrectomy, when done as the sole procedure, is considered experimental, investigational and unproven as a treatment for morbid obesity." I only have to have my psych profile (once I find a pscyhologist or psychiatrist who takes BC and will do a pre-op eval) and will be ready to schedule surgery, but am more anxious about the insurance than the surgery itself. Has anyone dealt with any of these issues? Thanks

