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Kim Tzoumakas is currently serving as the Chief Executive Officer of RAYUS Radiology since March 2021. Prior to this role, they were a Board Member at Coherus BioSciences starting in August 2020 and the Chairperson of the Board at International Oncology Care, Inc. starting in May 2020. Kim was also a Board Member at SeaSpine from February 2019 to April 2021. Before joining these companies, Kim Tzoumakas held multiple positions at 21st Century Oncology Holdings, Inc., including Chief Executive Officer from January 2018 to August 2020 and a Board Member from May 2020 to March 2021. Kim also has extensive experience as a Managing Partner in the Michigan office of Hall Render, where they served as a long-term board member and provided strategic and legal guidance to healthcare organizations.

Kim Tzoumakas earned a Bachelor of Business Administration - BBA degree in Business Administration and Management, General from Northwood University in the years 1986-1989. Later, Tzoumakas pursued a Juris Doctorate - Magna Cum Laude degree in Law from Cooley Law School between 1993 and 1996.