I think the false claims were on the Tiktok, but the crux that i detect is the issue "UHC called doctor out of OR" is likely true even if UHC didn't intend it that way.

>>The letter seems clear to me

Where is the letter?

>> doctor conceding that the wrong paperwork was submitted by her office (hence the call)

That is a strong assumption to make. The tack you are taking is that one of the 2 parties noticed a wrong PA was requested (and approved) and tried to do something about it, preop. That's the assumption. IF the PA was fine, and that's 100% shenanigans by UHC. Less likely, but still very possible.