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Byerwalter to serve as interim president and CEO of Stanford Health Care

Mariann Byerwalter has a long history of service and commitment to the Stanford community.

Mariann Byerwalter

Mariann Byerwalter will serve as interim president and CEO of Stanford Health Care beginning Jan. 2. To ensure a smooth changeover, she will transition into her new role over the final two months of current president and CEO Amir Dan Rubin’s tenure.

Byerwalter, who earned a bachelor’s degree from Stanford and an MBA from Harvard, has served on the SHC board of directors for more than 15 years, including eight as chair. She has a long history of service and commitment to the Stanford community.

She serves on the Lucile Packard Children’s Hospital Stanford board of directors and chairs the Stanford Medicine Advisory Council. From 1992 through 2012, she served three terms on the Stanford University board of trustees, chairing the Trustee Committee on the Medical Center. In recognition of her dedication, Byerwalter received the 2015 Gold Spike Award, which recognizes exceptional volunteer service and leadership for the university. In addition, she was awarded a 2015 School of Medicine Dean’s Medal in recognition of her contributions to advancing Stanford Medicine.

Byerwalter also served as chief financial officer and vice president for business affairs at Stanford.

Currently, she is chair of the board of directors of SRI International, a nonprofit independent research center that was originally founded as a Stanford research institute. She also sits on the boards of Pacific Life Insurance Co., Franklin Resources Inc., WageWorks Inc., Redwood Trust Inc. and the Burlington Capital Group.

“Given her years of leadership experience, deep understanding of Stanford’s culture, and exemplary dedication and commitment to the mission of Stanford Health Care, Mariann is uniquely equipped to serve in this interim capacity,” Lloyd Minor, MD, dean of the School of Medicine, and John Levin, chair of the SHC board of directors, said in a statement.

A committee co-chaired by Levin and Minor is conducting a nationwide search for a new president and CEO. Rubin will step down from his post in January to take a position as executive vice president of UnitedHealth Group and its Optum Organization. He served as the hospital’s president and CEO for five years, overseeing a period of expansion and innovation in patient-centered care.

Stanford Medicine integrates research, medical education and health care at its three institutions - Stanford University School of Medicine, Stanford Health Care (formerly Stanford Hospital & Clinics), and Lucile Packard Children's Hospital Stanford. For more information, please visit the Office of Communication & Public Affairs site at

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