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Mary Mason

Associate Director and Adjunct Professor, Cordell Institute for Policy in Medicine & Law

Mary Mason, MD, MBA, FACP is known as a healthcare innovator and leader executive with experience in international and rapidly growing environments.

Dr. Mason currently serves as Chief Executive Officer and Founder for Little Medical School, an award-winning educational organization and franchise with offices in more than 60 locations worldwide focusing on healthcare workforce development.

She is the former Chief Medical Officer for Centene Corporation, a Fortune 25 company that provides government-sponsored healthcare programs focusing on underinsured and uninsured individuals. During her tenure, Dr. Mason developed and executed nationally recognized clinical programs in various disease states designed to improve quality and reduce medical costs in a managed Medicaid and Medicare population, clinical policy, quality, and care coordination. She also founded the Joint Accredited Centene Institute for Advance Health Education, offering free education on the business of medicine for licensure to healthcare providers in 8 professions.

Dr. Mason is a board-certified internist and volunteers in safety net clinics and as an attending physician in the Washington University School of Medicine Internal Medicine Clinic. In addition, she is an adjunct lecturer for the Washington University School of Business and the Brown School of Social Work, where she teaches the principles of health insurance and managed care.  She is a long-time member of the Washington University School of Medicine Admissions Committee.

Dr. Mason serves on the Board of Directors of Dioun Health, a growing healthcare company providing our communities with high-quality, patient-centric care. An active member of the community, Mason serves on the national board of Parents as Teachers and the national council for Washington University’s Institute of Public Health.   She is a member of the Forbes and Fast Company Business Councils and regularly contributes to these publications.

Dr. Mason received her B.S. in Bioengineering from the University of Illinois Champaign-Urbana and her M.D. and MBA from Washington University in St. Louis. She has received alumni achievement awards from the University of Illinois and Washington University.

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  • Education
    • MBA, Washington University Olin School of Business, 1999
    • MD, Washington University School of Medicine, 1994
    • BS in Bioengineering, University of Illinois, Urbana-Champaign, 1990
  • Publications
    • How Leaders Can Help Their Teams Navigate Health Insurance Benefits. Forbes, Mason, M. (2022, November 7).
    • The Story of Your Life. Fast Company, Mason, M. (2022, October 11).
    • Thinking Like a Doctor When Addressing Business Issues. Forbes, Mason, M (2022, Oct 6).
    • Is Getting An MBA Right For You?, Forbes, Mason, M. (2022, September 15).
    • 5 Lessons To Take From The Dorm Room To The Board Room. Forbes, Mason, M. (2022, August 23).
    • Tips For Getting The Most Out Of Your Next Zoom Interview, Fast Company, Mason, M. (2022, August 22).
    • Pregnancy outcomes of managed Medicaid members prescribed home administration of 17 α-hydroxyprogesterone caproate. Lucas, B, Poole-Yaeger, A, Istwan, N, Stanziano, G, Rhea, D, Mason, M., Am J Perinatol 2012;29:489–96.
    • Effects of a pregnancy management program on birth outcomes in managed Medicaid. Manag Care. 2011 Apr. Mason, M.V., Poole-Yaeger, A., Lucas, B., Krueger, C.R., Ahmed, T., Duncan, I.
    • Impact of 17P usage on NICU admissions in a managed Medicaid population—a five-year review. Manag Care. 2010 Feb. Mason, M.V., Poole-Yaeger, A., Krueger, C.R., House, K.M., Lucas, B.
    • Optimizing the use of 17P in pregnant managed Medicaid members. Manag Care. 2008 Jan. Mason, M.V., House, K.M., Linehan, J., Speers, C.A., Joseph, L.M., Littlejohn, R.
    • Alpha-hydroxyprogesterone caproate (17P) usage in a Medicaid managed care plan and reduction in neonatal intensive care unit days. Manag Care. 2005 Oct. Mason, M.V., House, K.M., Fuest, C.M., Fitzgerald, D.R., Kitson, B.J., Inglis, J.A. 17
    • Cervical Carcinoma Failure in the Para-Aortic Nodes after Radiation Therapy. International Journal of Radiation Oncology, Biology and Physics, Volume 28, 1993. Grigsby P, Mason M, Perez CA.
    • Organ Preservation Therapy in Stage T1 and T2 carcinoma of the Breast. Frontiers in Radiation Therapy and Oncology. Volume 27, 1993.c, Perez Ca, Mason M, et al.
  • Activity and Affiliations
    • Fellow, American College of Physicians, 2008 to present
    • American Medical Association, 1990 to present
      • Governing Council, Resident and Fellows Section, 1997 to 1999
    • Chairman, Young Physician Section, Missouri State Medical Association, 2000 to 2005
    • Louis Metro Medical Society, 2000 to present
      • Chairman, Young Physician Section, 2001 to 2005
      • Public Relations Committee Member, 2001 to 2003
  • Honors and Awards
    • University of Illinois Homecoming Comeback Alumni Award, 2020
    • Washington University School of Medicine Alumni Achievement Award, 2019
    • Women in White Coats Hero, 2019
    • Louis Business Journal
      • Most Influential Business Women, 2016
      • 40 under 40, 2008
    • Alpha Omega Alpha Medical Honor Society
    • ACP Resident Physician Community Award, 1998
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