MINNEAPOLIS, Minn; March 8, 2021 –Center for Diagnostic Imaging (CDI), the nation’s
leading provider of comprehensive radiology services, announced today the
appointment of Kim Tzoumakas as Chief Executive Officer to lead the company’s next
phase of growth. Tzoumakas succeeds Rick Long, who successfully led the company
for the past six years and developed the company’s network of diagnostic imaging
clinics and radiologist partnerships across the country.

Tzoumakas most recently served as CEO of 21st Century Oncology (21CO), one of the
largest integrated cancer care networks in the world with 347 locations in the U.S. and
several Latin American countries. At 21CO, Ms. Tzoumakas successfully partnered with
more than 1,000 physicians and more than 3,000 team members to accelerate growth
through a focus on clinical delivery and patient satisfaction.

“I am thrilled to be the CEO of CDI,” said Tzoumakas. “It gives me the opportunity to
partner with physicians on best in class patient care, lead a strong team with solid
partnerships, and further expand CDI’s radiology services across the country.
Trends toward more cost effective, high quality care in outpatient settings have
positioned CDI for great success over the next several years and I am excited to be
part of this next phase of growth for the company.”

“Kim has a proven track record of building an organization with a strong commitment to
patient care and clinical quality,” said Long. “This competency paired with her
background in developing strong partnerships with physicians and other providers will
ensure her success in taking CDI to its next level of success.”

“The success we saw Kim achieve at 21CO as a result of her drive, strategic focus, and
ability to forge strong relationships was key to our decision to appoint her to succeed
Rick Long,” said Alex Carles, Managing Partner of Wellspring and CDI Board

“My vision for CDI is to be the leading radiology provider across the country while
partnering with the highest caliber physicians, strategic partners and team members,”
said Tzoumakas. “The strength of the Wellspring and CDI partnership will allow us
to expand our radiology services and grow our network across the country. Radiologists
and patients alike will benefit from the investments we will make in our people,
technology and service.”