Mark Thierer is a healthcare executive with over three decades of leadership experience in the field. They currently serve as Chairman of the Board and Chief Executive Officer of EVERSANA, and as a Board Member at Discover Financial Services; they also serve as Chairman of the Board at P3 Health Partners. They previously co-founded Waltz Health and served as Chief Executive Officer from 2021 to 2025, led Catamaran as Chairman and CEO from 2006 to 2015, and held roles including CEO OptumRx at UnitedHealth Group (2015–2017) and President of Physicians Interactive at Allscripts (2003–2006). They earned an MBA in Finance from Nova Southeastern University in 1985 and are Co-Founder of the Thierer Family Foundation.
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