Niall Brennan, BA, MPP

Former CMS Chief Data Officer and current

President and Executive Director


Health Care Cost Institute

Mr. Brennan was appointed President of HCCI in June 2017. In this role, he is responsible for all aspects of HCCI’s mission, including cutting edge research on health care utilization and spending, price transparency and public reporting, increasing both the comprehensiveness of and access to HCCI’s expansive data set, as well as working with state policy and decision makers to improve their health care systems. He is a nationally recognized expert in health care policy, the use of health care data to enable and accelerate health system change, and data transparency. He has published widely in leading academic journals, including the New England Journal of Medicine and Health Affairs. Prior to joining HCCI, Mr. Brennan was Chief Data Officer at the Centers for Medicare and Medicaid Services (CMS). He has also worked at the Brookings Institution, the Medicare Payment Advisory Commission, the Congressional Budget Office, the Urban Institute, and Price WaterhouseCoopers.

Mr. Brennan received his MPP from Georgetown University and his BA from University College Dublin, Ireland.



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