MAMSI/NC

I am wanting to have WLS, and I have a consult with my surgeon the first week of August. One of the things in the email sent to ne said that I should call my insurance to see if they cover it. I called them, and they said there is an exclusion, and they won't cover it. Is there anything I can do? I am going to go through our papers tonight and see if what they said is correct, I am just uncertain of what to do next... Sarah