My medical group would not let me see my surgeon without a 6 month supervised diet. I appealed with multiple Weight Watchers records, personal diaries, a graph I put together of years worth if diet attempts, and information on a hospital supervised program I did (this one did not involved weighing in).
I followed the example appeal letter in WLS for Dummies. Explained that another 6 month program would change nothing. That all I wanted was to be healthier for myself and my family.
I won the appeal and did NOT have to do a 6 month program.
But as previous posters have said, see what your surgeon and insurance company says. If your insurance company requires it, you will need to do an appeal to get around it.
Best wishes to you!!