Troyen A. Brennan, M.D., M.P.H., is Executive Vice President and Chief Medical Officer of CVS Health. In this role, Brennan provides oversight for the development of CVS Health’s clinical and medical affairs and health care strategy.
Previously, Brennan was Chief Medical Officer of Aetna Inc. Prior to that, Brennan served as president of Brigham and Women's Physicians Organization. In his academic work, he was Professor of Medicine at Harvard Medical School and Professor of Law and Public Health at Harvard School of Public Health.
Brennan received his M.D. and M.P.H. degrees from Yale Medical School and his J.D. degree from Yale Law School. He has a master’s degree from Oxford University and earned a BS from Southern Methodist University. He completed his internship and residency in internal medicine at Massachusetts General Hospital. He is a member of the Institute of Medicine of the National Academy of Sciences.