I get your example is hyperbole, but just for fun: the space flight would be recognized as an experimental treatment since it’s known not to be a routine/establ

I get your example is hyperbole, but just for fun: the space flight would be recognized as an experimental treatment since it’s known not to be a routine/established procedure. Expenses would be covered if a legitimate clinical trial of space flights were being conducted. Otherwise, costs would be out of pocket unless a special approval were granted. If space flight were being seriously studied for an extremely rare disease, it would likely be paid for by the research institution.