We have the best doctors, for people who can afford it.
So in that aspect you are completely correct. Reason being is we have the highest paid doctors in the world, and it causes a brain dump. The top notch grads from Canada, AUS, etc apply here for work. Once you get your doctorates out of the country, you just have to pass a test to practice in the US.
Our health care system is complete shit for those who cannot afford it, but then again hey that's their problem. Don't lose your medicare though, you're locked in for life. You should be well taken care of.
Of course if you have cash....well then the sky is the limit here.