Hello @suemer, I think when you call the Mayo Clinic location that you want to go for an appointment, they will help you determine which area the initial appointment is with. Then all of the areas work together to diagnose your health issues and come up with a treatment plan. More information can be found on their frequently asked questions for appointments page on the website:

Appointments at Mayo Clinic -- Frequently Asked Questions
-- https://www.mayoclinic.org/appointments/faq

John