In this paper I have briefly surveyed the major regulatory tools available as to medical tourism by U.S. patients. Thesurveyisnotexhaustive,butithopefullygivesagood indication of where we are. The overall take-away is that regulating in this area is complex, costly, and difficult to enforce. That said, not all forms of regulation are created equal and there are a few places where I think regulating medical tourism would be easier: Home country governments can much more easily regulate government and insurer-prompted medical tourism, and within medical tourism by patients paying out-of-pocket attempts to use criminal sanctions to crack down on some forms of circumvention tourism (physician-assisted suicide tourism in particular) seem more feasible. While destination country and multilateral regulation of medical tourism is desirable and might be effective, I am skeptical that there is a lot of political will to make these feasible possibilities in the middle term. What should those interested in the normative and legal questions posed by medical tourism (of which I include myself) make of this assessment? In the areas where regulation will be difficult to implement or is otherwise unappealing, I think (speaking like a lawyer) that the “standard of proof” should be higher; that is, given the difficulties I have identified we may need particularly compelling arguments on the “ought” side in favor of intervention to justify such regulation in many of these areas. Where regulation is easier to implement, by contrast, less compelling normative arguments might win the day.