I needed to see this thread. Because my doctor office co-pay according to my insurance should be $100 was $70 before Jan 2010 but they charge $150 plus I get billed and extra $50 because he does the barium swallow with the x-ray machine. Felt like I too was being robbed. I have over 6 friends whose don't pay any co-pays. Same medical insurance. But they just get the fill in the doctors office without the barium swallow.