Will Aetna Insurance Cover??? Surgery...?

I've been looking into the Lapband Procedure and my Insurance, Aetna, will cover if I have any of these three listed co-morbid diseases: Diabetes, Hypertension or Sleep Apnea. I don't have any of those but I have a huge hereditary background of Diabetic family members including close family such as: Father, Grandparents, Aunts and Uncles. However I have Asthma. I know there is a way longer list of co-morbid diseases so will those three be all that they will most likely stick by or is there a chance that mine can be approved even though they only state the three I listed above???? Pls only those in the health insurance business or those who have had personal experience. Thanks!