Physician | NYT Bestselling Author

Gabrielle Lyon

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President and Chief Executive Officer

Marc L. Boom

Dr. Gabrielle Lyon is a board-certified physician, founder of the Muscle-Centric Medicine® movement, and the New York Times-bestselling author of FOREVER STRONG.

With advanced training in nutritional sciences and geriatrics from Washington University in St. Louis, Dr. Lyon is at the forefront of a health revolution—one that places muscle, the organ of longevity, at the core of aging well, disease prevention, and optimal performance.
Through her clinical work, bestselling book, and top-ranked podcast “The Dr. Gabrielle Lyon Show,” she challenges outdated paradigms of health and empowers individuals to build bodies and minds that thrive under pressure.

Her message is clear: strength is not a luxury but a responsibility. Dr. Lyon's mission is to inspire a new standard of resilience, redefine how we age, and cultivate a generation that leads with clarity, lives with discipline, and contributes with intention.

Dr. Marc Boom has been the president and CEO of Houston Methodist since 2012.  

Houston Methodist is a hospital system with more than 2,700 beds and over 34,000 employees. 

Its flagship, Houston Methodist Hospital, has been recognized by U.S. News & World Report as an Honor Roll hospital eight times and the No. 1 hospital in Texas for 13 years in a row.

The system also includes a world-renowned research institute, seven community hospitals and a continuing care hospital, two large physician organizations and more than 50 GME programs. Houston Methodist is affiliated with several academic institutions including Weill Cornell Medical College, NewYork-Presbyterian Hospital, Texas A&M University and Rice University. 

Dr. Boom holds a bachelor’s degree in biology with high honors from The University of Texas at Austin, an M.D. with high honors from Baylor College of Medicine, and a Master of Business Administration from The Wharton School of the University of Pennsylvania. He completed a residency in internal medicine at Massachusetts General Hospital, Harvard Medical School, and fellowships in geriatric medicine and general medicine at the Hospital of the University of Pennsylvania. He is board certified in internal medicine and geriatric medicine and maintains a part-time clinical practice.

In 2020, Dr. Boom emerged as a national leader in the efforts to educate the public about COVID-19 and the need for vaccines, leading the way as the first hospital system CEO in the country to mandate vaccines for employees and physicians.


Jaewon Ryu, MD, JD, is the CEO of Risant Health, after having served as the President and CEO of Geisinger, its inaugural member organization. Risant Health is a nonprofit organization created by Kaiser Permanente to expand and accelerate the adoption and success of value-based care in diverse, multi-payer, multi-provider, health system environments across the country. By doing so, it seeks to improve the health of the communities it serves, achieve better health outcomes, and improve health care affordability. 
Dr. Ryu came to Geisinger in 2016 from Humana, where he was responsible for the company’s care delivery functions and capabilities, and previously, he held various leadership roles at the University of Illinois Hospital & Health Sciences System, Kaiser Permanente, and in government at the Centers for Medicare and Medicaid Services and as a White House Fellow placed at the Department of Veterans Affairs. He started his career as a practicing corporate healthcare attorney.
Dr. Ryu recently completed a full, two-term stint (2018-2024) on the Medicare Payment Advisory Commission (MedPAC), a body legislatively tasked with advising Congress on policies governing health plans and providers serving Medicare beneficiaries. Currently, he serves on the boards of various organizations, including the National Committee for Quality Assurance (NCQA), the Commonwealth Fund, and the KP Medical Foundation.
Dr. Ryu earned his B.A. from Yale University and his M.D. and J.D. from the University of Chicago. He completed his residency training in emergency medicine at Harbor-UCLA Medical Center.


Chief Executive Officer

Jaewon Ryu

Dr. Gabrielle Lyon, D.O.