I've been trying to find this on the UCH web site for over a month and I finally put the right keywords into the search!! (or maybe they just finally got it on the web site)
This will tell you what WLS they cover or don't cover and why, what some of the criteria is for being approved, and lots of other info that might be helpful.
I haven't found a direct link, but if you go to
https://www.unitedhealthcareonline.com/
and type "bariatric" into the Search box, you'll get a link called "Bariatric Surgery" and clicking on it will bring you to the page.
The text is too big to paste here so if you can't find the link the way I describe, PM me and I'll email you the text.