11/02/2026
TMC Health has named physician executive Chad Whelan, MD, MHSA, chief executive officer of Tucson Medical Center.
In this role, Whelan will lead Tucson Medical Center and TMC Rincon, with a focus on clinical excellence, exceptional patient care and supporting the physicians, nurses, employees and leaders who serve the Southern Arizona community.
For Whelan, this new role is also a homecoming. Having previously served in healthcare leadership roles in Tucson, he knows Southern Arizona, understands our community and is excited to return.
“Southern Arizona is a community I know and care deeply about, and I am excited to return,” said Whelan. “Tucson Medical Center has an extraordinary legacy, built by the people who care for this community every day. I'm looking forward to getting to know the team, listening, learning and working together to build on that legacy.”
Whelan currently serves as system chief operating officer for Premier Health and president of Miami Valley Hospital in Dayton, Ohio. A physician and experienced healthcare leader, he brings a strong background in patient safety, quality, physician partnerships and creating environments where teams can thrive.
“Chad understands that great healthcare starts with great people,” said Mimi Coomler, president and CEO of TMC Health. “He brings a strong commitment to building a culture where physicians, nurses and employees feel supported, valued and empowered to provide exceptional care. We're thrilled to welcome him back to Tucson and to the TMC Health family.”
We also want to thank Dr. Josh Lee for his leadership and service as interim CEO, along with the many team members who stepped up to support essential services and ensure continuity throughout the CEO search.
Please join us in welcoming Dr. Chad Whelan to Tucson Medical Center and TMC Health. We look forward to introducing him to our teams and sharing more about his arrival in the coming weeks.