According to the San Francisco Chronicle, "San Francisco's five nonprofit hospitals received $79 million last year in tax breaks intended to compensate them for providing free care to the city's poor and uninsured, but they spent just $16 million on charity care, according to a new city report. California Pacific Medical Center, with campuses in Laurel Heights, Pacific Heights and the Castro, was responsible for the vast majority of the disparity the report by the city Department of Public Health said. California Pacific received close to $70 million in tax breaks - $67 million in state and federal income tax exemptions and $2.8 million in local property tax exemptions - while spending $5.2 million on charity care, the report said."
Like universities, what is tax exempt should be up for review. Thanks to San Francisco for highlighting a problem that is not specific to the city -- this is a national problem.