Disagree with your analysis. We get the "latest and greatest" in Japan, Hong Kong, Germany, etc, all at a fraction of the cost of what one would pay in the US. The screening technology, tests, quality of surgery is a good (and often way better than the quality of health care and average American receives). So, comparably, US health care costs have disproportionately increased relative to the increase in the quality of the services, rendered.
Also in other G7 countries (let's exclude city states like Singapore or HK for a moment) the health care coverage is much broader across society than in the US, so another of the common arguments, that health care in the US is expensive because a limited pot has to feed a lot, is invalidated as well.
If you look at the charged cost of services rendered at hospitals and care clinics you find your answer. It is ridiculously inflated prices charged for such services.