Brackenridge's Medical Selection of Life Risks

Daniel D. Zimmerman , M.D., is Senior Vice President and Executive Medical Editor and Advisor for RGA Reinsurance Company. In this role, he serves as the Editor-in-Chief of Brackenridge’s Medical Selection of Life Risks 2026 revision and advises senior corporate leadership on scientific and medical topics.  He is also a member of the board of the International Committee for Insurance Medicine (ICLAM). 

This not-for-profit collaboration between RGA and Washington University School of Medicine in St. Louis funds the study of factors that either predict the mortality and morbidity of select populations or influence improvements in longevity, health, and wellness.

Prior to his current role, Dan was Head of Global Medical and Chief Science Advisor, where he was responsible for thought and medical leadership, case consultation, product development, client support, training and education, and executive advising. Before joining RGA, he was a medical director with Northwestern Mutual Life Insurance Company and had previously practiced primary care internal medicine and pediatrics in Tampa, Florida. 

Dan received his medical degree from the University of Wisconsin School of Medicine and Public Health and his undergraduate degree in Medical Microbiology and Molecular Biology from the University of Wisconsin – Madison, Wisconsin (U.S.). Professional certifications currently maintained include those from the American Board of Pediatrics, American Board of Internal Medicine, and the Board of Insurance Medicine.  He has held leadership positions with the American Council of Life Insurers (ACLI), participated in program committees of the American Academy of Insurance Medicine (AAIM), and frequently represents RGA to key industry professional organizations. He has also contributed several articles to the Journal of Insurance Medicine , On The Risk, ThinkAdvisor, and Best’s Review .  

Rodney C. Richie , M.D., is the Editor-in-Chief of the American Academy of Insurance Medicine's Journal of Insurance Medicine . He is a past medical director of both the Texas Life Insurance Company and EMSI. He has been an active member of the American Academic of Insurance Medicine (AAIM) for almost four decades. 

Michael L. Moore , M.D., is Chief Medical Director of Nationwide Insurance in Columbus, Ohio. 

Ross MacKenzie , M.D., is the current Editor Emeritus of the American Academy of Insurance Medicine's Journal of Insurance Medicine . Dr. MacKenzie spent most of his career as a board-certified cardiologist in Canada.