Aaron Carroll explodes a talking point:

I’m not denying that some people with means might come to the United States for care.  If I needed a heart/lung transplant, there’s no place I’d rather be.  But for the vast, vast majority of people, that’s not happening.  You shouldn’t use the anecdote to describe things at a population level.  This study showed you three different methodologies, all with solid rationales behind them, all showing that this meme is mostly apocryphal.