Medicare - AARP Securehorizons

I have been calling Medicare for weeks now and the sleeve is not covered in Oregon yet and when I have called my AARP-securehorizons that I go throgh for my Medicare has said the same thing....Now last week Securehorizon said they cover the sleeve wasnt sure what to think so I called again and talked to someone else and they said the same thing... So today I called them one more time an they said yes again and gave me his name told me to wright it down and the date and time for my records of him saying it was covered... so now what I called and talked to the doctors office and she said no its not covered but she would call and let me know what she finds out I think I still want her to send in my paper work and see what happens... so those that have been throgh this like appeals and such please what do you think...