I have seen a few different doctors at mayo clinic in AZ ,but not dr. Goodman. They diagnosed my pots . For some of their specialist doctors you need to see one of their internist physicians first ,but if you saw Dr Goodman before then Im not sure how come you can't see him now . You can't really move up your appointments over there, so sometimes you have to wait a while to see certain doctors. Maybe search for a specialist outside of mayo so you don't have to jump through their hoops . If you need the help now ,don't wait on them. To tell you the truth ,mayo has not helped my situation that much ....But to answer your main question, I have not had problems getting follow up appointments .