Author Interviews, Cost of Health Care, CT Scanning, Health Care Systems / 23.09.2016 Interview with: Hui Zhang, Ph.D., MBA Virginia Polytechnic Institute and State University Blacksburg What is the background for this study? What are the main findings? Response: To promote healthcare coordination and contain the rising costs in the US healthcare system, a variety of payment innovations has been developed and field-tested in both public and private sector. Among them, the Medicare Shared Savings Program (MSSP) for Accountable Care Organizations (ACOs), administered by the Centers for Medicare and Medicaid Services (CMS) has received considerable attention. Our study took a mathematical modeling approach and comprehensively captured and analyzed the effect of this new payment systems on healthcare stakeholder decisions and system-wide outcomes. Our results provided decision-making insights for payers on how to improve MSSP, for ACOs on how to distribute MSSP incentives among their members, and for hospitals on whether to invest in new CT imaging systems.