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Kim Tzoumakas

Chief Executive Officer

Kim Tzoumakas is the Chief Executive Officer of Maxor National Pharmacy Services and a member of the board of directors.​

​With more than 25 years of strategic and operational leadership experience in the healthcare industry, Kim has extensive experience building high performing corporate cultures and driving business transformation and performance. She has provided strategic, transactional and governance advice to health care providers including serving as a board member or advisor to public and private companies.​

​Most recently, Kim served as CEO of RAYUS Radiology, a leading national provider for advanced diagnostic and interventional radiology services. Before leading RAYUS, Tzoumakas served as CEO of 21st Century Oncology, one of the largest integrated cancer care networks in the world with 347 locations in the U.S. and several Latin American countries and drove a successful exit for its owners to KKR-backed GenesisCare in 2020. ​

​She holds a Juris Doctor Degree (JD) from Thomas Cooley Law School and a BBA from Northwood University.​

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