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Dignity Health Arizona General Hospital Welcomes New Chief Medical Officer


Aaron Mickelson

PHOENIX, Ariz. (April 21, 2022) – Aaron Mickelson, DO, MPH, MHM, has been named the new chief medical officer for Arizona General Hospital. Dr. Mickelson has assumed the role previously held by Brian Tiffany, MD, PhD, who was recently promoted to chief executive officer for the Dignity Health Southwest Division.  

As Arizona General’s chief medical officer, Dr. Mickelson will help lead efforts surrounding quality care, patient safety, patient experience and resource utilization. He will engage the medical staff and work closely with the entire team to ensure the highest standards of quality and service. Dignity Health Arizona General Hospital is comprised of two acute care hospitals in Mesa and Laveen and 12 hospital satellite emergency departments located throughout the Valley.

“I am delighted to welcome Dr. Mickelson as our chief medical officer,” says Jane Hanson, President and CEO for Dignity Health Arizona General Hospital. “Dr. Mickelson has been an integral part of Dignity Health’s medical team for many years and has been devoted to delivering the highest quality care and humankindness to patients.”

Dr. Mickelson has been an emergency medicine physician with Arizona General since June 2020. Before joining Arizona General, he provided care and services at Dignity Health Chandler Regional and Mercy Gilbert Medical Centers as a member of Premier Emergency Medical Services for many years. With more than 27 years of health care experience, Dr. Mickelson started his career as a health unit coordinator at Barrow Neurological Institute at Dignity Health St. Joseph’s Hospital and Medical Center. He also served as an operations supervisor for MedAire, a Banner Emergency Department call and telemedicine center.

“I’m honored to serve as Arizona General’s chief medical officer,” says Dr. Mickelson. “I look forward to leading the medical team to ensure our patients receive first-in-class and compassionate medical care.  

Dr. Mickelson earned his Doctor of Osteopathic Medicine and a Master of Public Health from Nova Southeastern University in Florida. He holds a Master of Healthcare Management from the University of Arizona.

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Publish Date: 

Thursday, April 21, 2022

Media Contact


Carmelle Malkovich, Communications Director – Public Relations

p: (602) 406-3319

[email protected]