It's no secret that you have to take up a full-time job as your own advocate to coordinate between the provider and your insurance company. You have to untangle coding mistakes and do a bunch of stuff that usually requires about 3-4 full days of full time phone work, following up with people, escalating, etc. It always follows the path of least resistance and when the customer doesn't speak up the system crushes them. There are a lot of weird loopholes that result in bills, but a couple dozen hours of phone and coordination work will result in those bills getting dropped, or paid for, due to the No Surprises Act (as long as you went to an in-network facility)