Unfortunately, if the insurance companies find out about that, they may no longer pay claims for the insured patients of those doctors. According to the doctors I know, they are not allowed to discount the bills for the uninsured. The insurance company enjoys a discounted rate and never pays the billed price yet they contractually bind Doctors to have to make more money treating an uninsured patient with the ability to pay than an insured one. Billing at a discount for an uninsured patient is considered breach of contract with the insurance companies.
They won't need to do that much any more, our government just handed them exactly what they wanted. Everyone now has to pay insurance companies and they have control over everyone's care. Insurance companies are absolutely the only ones that will be getting any good out of Obamacare in the long run. It was a bad idea when republicans brought it up and just because insurance companies now endorse democratic candidates it is still a bad idea.
I have exceptional insurance but I choose to pay $30k to see a specialist my insurance company didn't think I needed. I would pay 10 times that for what I have gotten. Being free to make my own health care decisions and allowing the doctors to treat as they see best for this particular situation rather than try to make everything fit into a billing code has ended up giving me much better outcome at a far cheaper price than the insurance company would have paid in the end. Insurance was making me suffer needlessly by tying the hands of good doctors. When I said i would pay cash, I got help in 6 months for something that has been maintained at a "good enough" level for which my insurance was billed over $200,000 just in prescription drugs since 2000. Yet, me putting $30k up front fixed the problem.
I understand many people don't have the luxury of being able to afford to fix their own problems and they need a solution too but not one that makes us all get "good enough" care. I wasn't making it living paycheck to paycheck just 3 years ago myself but I worked very hard in spite of my illness to be able to afford treatment that didn't fit neatly on an insurance form.