According to data from the Boston Globe, Massachusetts health insurance companies pay a handful of hospitals far more for the same work even when there is no evidence that the higher-priced care produces healthier patients. In fact, sometimes the opposite is true: Massachusetts General Hospital, for example, earns 15% more than Beth Israel Deaconess Medical Center for treating heart-failure patients even though government figures show that Beth Israel has for years reported lower patient death rates, the investigation found.