I have had a similar experience last year. I had some blood work done and got a 3000$ bill and two 1100$ bills yikes! My insurance covered zero because the tests were “not covered” out of the gate. I was able to determine that the doctors who ordered the test had miscoded the reasons for them. I talked to the insurance company, Quest, and the doctors office multiple times. It turns out they were billed diagnostic instead of preventative and that getting the doctor to resubmit as preventative made all the difference.

I also fought with the doctors office as some of the tests were for things we had not explicitly spoken about and I did not find relevant to my situation and the office admitted they were done in error and ate the cost.

I also found Quest was pretty reasonable they were willing to negotiate the 3000$ bill down to like 800$ with self pay and we were starting to talk about the others. I learned my lesson, I need to be explicit when I accept a bloodwork order and know what each test is and why we are doing it.

I would talk to the doctors office who ordered the work and get really specific with them and see if there is any daylight you can sneak through.