American hospitals do offer the best care possible to patients. Thats actually the problem. Much has been made recently of the tendency of hospitals (in the US) to overdiagnose/overtreat patients, which is driving up the overall cost of healthcare. In other countries like the UK, I think that there is more caution regarding prescribing costly, unnecessary procedures. The result is that, yes, the actual healthcare is probably better than anywhere in the world, but the additional quality compared to countries like the UK or Australia is marginal considering the added cost, which for anyone with bad/no insurance, is insurmountable.