Health insurance sent surprise $1500 bill for failing to authorize despite never sending anything about authorization?

I got a surprise $1500 bill today from my health insurance from a procedure I had over two months ago. The procedure was first scheduled in February and up till now I have never received any form of contact about whether the procedure was authorized or not. This is where it gets more complicated is the provider was in-network and I have UHC, which on their website states
"A decision by your health insurer or plan that a health care service, treatment plan, prescription drug or durable medical equipment (DME) is medically necessary. Your health insurance or plan may require preauthorization for certain services before you receive them, except in an emergency.

What this means for you:

Generally, if you are receiving services from network providers, you can rely on your network physician to obtain Prior Authorization. But when choosing out-of-network services, you will be responsible for obtaining Prior Authorization. Without this approval, you could be responsible for the full cost."
I also have never heard anything from the provider with insurance issues, change of payment, and all my bills show that I only needed to pay $60, a $30 co-pay for the initial appointment and for the procedure which was also billed at $650 for fee's.

Insurance since has never sent anything about a denial or anything of the likes.

I figure the route is to appeal but I didn't know if anyone else has had similar issues and how it went/what they did

submitted by /u/likeabosstroll
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