Which insurance companies are revision friendly? I need a 2nd gastric bypass but United health denied me twice.

I have been cleared medically for a 2nd gastric bypass re: significant pouch dilation and weight regain. I had surgery in 2003 when protocol for surgery resulted in larger diameter of stoma thereby permitting weight regain resulting from return to poor eating habits. QUESTION: which insurance companies are more willing to cover a revision surgery. I have United Health and they denied me twice re: reason for revision is not directly related to first surgery.

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