The figure is amazing, not to mention insane ($670 every MONTH). The article (http://www.msnbc.msn.com/id/29355231/) notes that the costliest ailment to treat is heart disease and related things. Since an aerobic exercise program is one of the best ways to reduce the incidence and severity of heart disease, and cycling is one of many ways of getting aerobic exercise, IMO a really good case can be made to infrastructure funding. After all, the USA spends more per capita on health care than any other country; however, it is NOT the healthiest country (IIRC it ranks 7th or so) in the world. And all this ignores the effects of pollution, congestion, and such that increased cycling would also address.
FWIW, with a number this high, no amount of redistributing costs can make health care affordable for all. Only drastic reductions in the overall costs will do.