Disease/disorder requiring special med. treatment?

Question

What disease/disorder would require specialist treatment on an ongoing basis? (This is for a novel, it's a minor character, but still important) The character would be foreign born, probably from Africa or the Middle East, would live in New Jersey BUT I need the medical treatment to be fairly far away, at least requiring a plane ride. Please advise if you can think of any diseases/disorders and or treatment centers/hospitals. Thank you so much! I've been researching all day but going in circles.

Answer 1

People with renal (kidney) failure need dialysis 3 times a week for the rest of their life and need constant care from a nephrologist.