I don't have BCBS, I have First Health, but I can tell you what my insurance required. My managed weight care rule was this: Documentation that patient has failed to lose weight (approximately 10% from baseline) or has regained weight blah blah blah. It also requires a comorbidity if your BMI is under 40. Depending on your insurance (I looked at all the BCBS programs that were in the packet of insurance requirements that my surgeon gave out, but didn't see yours.), they most likely won't pay for surgery if you get below 40 and stay there, especially since you don't have a comorbidity. The majority of the BCBS programs that were in my packet required a comorbidity if you had a BMI under 40.