Insurance Approval for Revisonal Surgery

Hello!!  My name is Melissa, and I had Roux-en-Y Gastric Bypass done back in 2003.  On the day of my surgery, I weighed 326 pounds.  My lowest weight after surgery was 160 pounds.   I currently weigh 245 pounds.  I am really interested in having a revisional surgery,  such as StomaPhyx.  Has anyone had any luck getting insurance approval for it?  If you did, which type of surgery did you have, and what surgeon did your procedure?  I would greatly appreciate any information that you would be willing to share with me.  Thanks so much!!    XOXOXOX