Just look at the Wikipedia page on List of countries by household final consumption expenditure per capita. Americans consume much more than anyone else on the world, and it's not even close. Americans even consume at a higher level than the "ultra-rich" countries that exceed it in GDP per capita, e.g. 30 percent more than Luxembourg (which is number 2 on the list)!
This covers all forms of consumption, in which healthcare is only a fraction. The discrepancy is so great that it can't be explained by US healthcare being expensive. It's the other way round, it's healthcare consumption that is being pulled along by the rest of the consumption.