I'm sorry this has happened to you. I have BCBS, too, and struggled trying to understand my benefits. I my started this process in July 2009 and was denied the first time in December 2009 because my "documentation of physician supervised weight loss efforts did not demonstrate that attempt was made over a sufficient period of time." My policy required documentation for two years. My medical records showed far more than a two year history of weight loss efforts, so I called my insurance company to get clarification concerning exactly what I needed to do to be approved; it was difficult to get a clear answer. The woman I spoke to on the phone was very nice, but I could tell she became annoyed by all of my questions. I finally asked to speak with her supervisor because the answers I had received were vague at best. I almost gave up.
However, in February 2010, I started regular visits at my doctor's office. During each visit, we specifically discussed in detail my weight loss efforts. The two year time period actually passed by more quickly than I thought it would. My final visit was on February 13, 2012. The insurance company received my paperwork on February 15; I was approved on February 17 and received my approval letter on February 21.
Interestingly, when I first started the process in 2009, a 35 BMI with a co-morbidity was required, but the medical policy was revised in September 2011 and required a 30 BMI with a co-morbidity.
Be persistent and hopefully, you will receive your approval soon.