Doctor's can set their payments anywhere, and it's absolutely meaningless when insurance is involved. When a doctor agrees to accept a particular insurance, they are also agreeing to accept what the insurance believes is an "acceptable" charge for services. That may be only a couple hundred dollars for something that the doctor says they charge a thousand for. They can't come after you for the difference, only the co-pay or your 20% or however the insurance is set up. At least, that's the way it works in the US. Any time you use your insurance you should receive an Explanation of Benefits (EOB) from your insurance company that explains what was charged, what was paid, what was forgiven (the difference between the actual charge and the "acceptable" amount), and what you owe, if anything. I definitely suggest you read your EOBs. They're eye
opening, to say the least.