Chances of getting United Healthcare to approve RNY Revision

Just had endoscopy today and stoma has enlarged.  Dr. suggested revision.  I have United Healthcare (government plan). Has anyone had any luck getting them to approve revision?

Also have empire-united healthcare. They denied my revision from band to sleeve because my BMI was 33 and they said that revisions are experimental on someone under BMI of 35. I went through 2 rounds of appeals and won the second one. My surgeon said that 85 percent of denials get overturned at the stage 2 appeal. Good luck!