@johnbishop

One thing to check and that's to see if anyone is doing research for your particular issue. If they think that you would make a good candidate they would be happy to see you. They can't always find enough local folks to help fill their needs. I'm about 180 miles from Rochester Mayo so it's no biggie to travel [except for some winter days]. I've participated in a few studies over the last 6-7 years.
At the end of my first visit the doc said I had 3 choices. Do nothing, have the adrenalectomy or there is this study I'm leading. I looked into it and got accepted for the study.