I wouldn’t be surprised to see U.S. doctors establish clinics in The Bahamas, Panama, Costa Rica, Bermude, and at various locations throughout the Caribbean.
Sigh, “Bermude” should be Bermuda.
I believe it is already occurring, just as the best British and then Canadian doctors established clinics and hospitals in India and Thailand and now Burma.
I see hospital ships, just outside the maritime zone limit. It would be like gambling barges or cruises. Of course, laws would have to change a bit with respect to liability, but that would come.
On the land-based clinic side, I've been talking with a friend who has knowledge of doings in the Caymans. In one of the remote arms of Grand Cayman, a hospital has been build to focus on cardiac care which is primarily staffed by Indian doctors. Supposedly it's a well-run place, but hasn't established enough of a track record of care to do business with American insurers. Sign of the times...
Johns Hopkins has established a medical tourism hospital in Panama. Google it.