With the goal of lowering health care costs, many policymakers and health care delivery systems are looking to change the way doctors are paid by focusing on quality of care. One innovative approach has been to shift incentives from a fee-for-service (FFS) payment model to a pay-for-performance (P4P) arrangement, under which doctors are rewarded for improving their quality of care. However, to date the financial incentives may not have triggered practices to change individual physician compensation policies. A recent Washington Post Wonkblog article reports findings from a study by former HCFO grantee Andrew Ryan, Ph.D., University of Michigan, on physician compensation in accountable care organizations (ACOs).