As 10 medical groups concluded year four of the CMS physician group practice pay-for-performance demonstration project, the agency announced that the participants had saved $38.7 million in Medicare expenditures. The physician groups achieved benchmark performance marks in 29 of the 32 measures reported, and every group met all benchmark measures for treating patients with congestive heart failure. Geisinger Clinic, Marshfield Clinic and Park Nicollet Health Services achieved benchmarks on all of the 32 measures. --Read the full story in FierceHealthFinance