I’m sorry he is battling cancer, I lost my father to it in 97.

As for these out of network providers I? I say you need to fight the insurance company about the charges.

His cancer treatment team is at one location. It’s not your fault the anesthesia group doesn’t have a provider for X insurance.

You can submit an appeal stating his oncologist and surgeons needed are all together at hospital A there is no way for continuity of care if you have to go to another hospital, it’s likely another hospital will refuse it and your Doctors do not have privileges there.

Insurance companies will do anything to bill a patient , they bank on people just not fighting a bill.

I hope he can get some sort of break or a complete write off of those charges.

I hope your brother receives some positive news soon