Premera Heritage Plus 1

 Hello, I have Premera blue cross in washington state,  I just found out that my benefits have a written exclusion for obesity related surgery, prescriptions, etc.    Am I dead in the water as far as having them pay for this, or is there some way I can proceed and see what happens before I decide to self pay?   

Im currently 27 years old and just under 500lbs, I don't think medical necessity or etc is going to be an issue, just wondering if I have options or if "thats that" on this.