UGI Series cost in Chattanooga

My bariatric surgeon wants an UGI series before he will schedule a date for surgery.  He wanted my internist to request it for me to possibley get insurance coverage.  I am paying cash for the surgery because my insurance will not cover it.  But, my internist won't proceed without a diagnosis to submit with the test request.  So, I will probably need to pay for the UGI myself.  Does anyone know if I can negotiate a reasonable fee?  If so, who would be a good service provider in Chattanooga?  How would I go about it?  Any other ideas?

The hospital there very likely has a self pay rate. Is the UGI part of routine screening or do you have symptoms he is trying to diagnose? If this is part of their routine screening, they likely already have a self pay rate for the testing with the hospital. I would ask the surgeon's office about the rate.

Thanks!