I am with you. I've been through the same with this company, I had to take a blood test that my insurance doesn't covered for my age, unfortunately, I didn't know that quest diagnostic will charge this amount. They asked for 400 hundred dollars, however, my insurance only will pay 53 dollars for the same test, they did that to my husband and this is what he paid.
You can see that is less than 80% of my bill. I asked for a discount and they told me that the don't do this kind of thing.
What do that means? First of all for them the individuals doesn't have any right, pretty sad. The money is the same with insurance or without it. They are abuse with the unisurance person because they can. Really, shame of them.