Steward Health Care joins a Partnership with the Defense Department
Steward Health Care Completes Sale of Its Utah Health Care Sites to Commonspirit Health
Centura Health To Acquire Utah Care Sites From Steward Health Care
Dr. Marisela Marrero Becomes Steward Health Care’s First Leader of DEI and Health Care Equity
Employing Data, Steward Health Care Partners with Blue Cross to Eliminate Inequities in Care
University of Miami and Steward Health Care Launch Clinical Training Partnership


Steward Medical Group is among a small number of health care organizations in the United States that is physician-led. Our physician leadership sets the standard for excellence and is dedicated to innovation and technology to advance the delivery of care and inspire best results for our patients.

Physician-Led Care Team

Our physician practices are supported by clinical teams of nurse practitioners, physician assistants, and certified nursing assistants who work together to organize patient care.

Meet Our Physician Leaders

As a physician-led organization, we are able to keep our primary focus on our patients and our practices. Like our providers, our leaders have undergone rigid medical training and have real-life experience in the day-to-day life of medical practices which enables them to be strong advocates for our physicians. Most importantly, our leaders have treated many patients in their careers and are attuned to the various needs our patients have, and as well as patients’ expectations of their healthcare providers. Together, this allows Steward Medical Group to ensure the delivery of compassionate care in a setting close to where our patients live and work.


Amy Guay, MPH, FHFMA, ACMPE is the president of Steward Medical Group. A health care industry veteran, Amy previously served as Chief Financial Officer of Steward Medical Group.

Prior to joining Steward Medical Group, Amy served as the Chief Financial Officer and Senior Vice President at Partners Continuing Care, Inc., in Boston, and as Chief Financial Officer and Vice President of Finance at Harvard Medical Faculty Physicians at the Beth Israel Deaconess Medical Center… Additionally, she also served as Chief Financial Officer at Partners Community Health Inc.- Pentucket Medical Associates and as Senior Director of Finance and Revenue Operations at Boston Medical Center. Amy holds a Master of Public Health from Boston University, and earned her Bachelor of Science in Business at Bentley University. She is also a Fellow in the Healthcare Financial Management Association. When not working, Amy enjoys reading and traveling.


Dr. Mitty is a veteran of Steward, having served on both the hospital side in Massachusetts, and most recently as Senior Vice President of Steward Medical Group’s Arizona, Florida, Ohio, Pennsylvania, and Utah regions. He is also a practicing gastroenterologist with continuing on-call duties at St. Elizabeth’s in Boston.

A native of the New York City area, Dr. Mitty attended Wesleyan University as an undergraduate, and then obtained his MD from New York University School of Medicine. After completing his … A member of the St. Elizabeth’s Medical Center Medical Staff since 1994, Dr. Mitty’s areas of clinical focus include therapeutic biliary endoscopy, esophageal diseases, and diseases of the pancreas. He has also served as President of the New England