Hi Babette, It was very stressful to go to Mayo alone as I was paying everything myself and if ever I would have been sent to the ER it would have been extra useless cost. So I was extremelly cautious. When I was out of meds I asked to be escorted to the different testing sites. I know that a TTT cost from 2,000 to 7,000$ depending on what they do during the test. I would guess that you have between 7,000 and 15,000 $ of tests scheduled. I think you can call ahead of time and asked them. Thanks