Michael J. Orris, DO, MBA, FASMBS

Bariatric Surgeon & Weight Loss Specialist located in Tempe, Glendale, Mesa, Tucson, & Phoenix, AZ



Specializing in weight loss surgery and bariatrics, Michael J. Orris DO, MBA, FASMBS, is a board-certified surgeon with over 10 years of medical experience. Recognized as one of Phoenix’s top doctors by PHOENIX magazine, Dr. Orris provides patients with the latest in effective, personalized weight loss management at the Weight Loss Institute of Arizona, which has two locations in Tempe and one each in Glendale, Phoenix, Mesa and Tucson, Arizona.

After completing his MBA in health care administration at St. Joseph’s University in Philadelphia, Dr. Orris earned his doctor of osteopathic medicine degree from the Philadelphia College of Osteopathic Medicine. Once he completed his medical education, Dr. Orris began his career with a surgical residency at Pinnacle Health in Harrisburg, Pennsylvania.

Dr. Orris is certified by the American Osteopathic Board of Surgery and is a certified Lap-Band® System surgeon.

With his extensive range of medical experience, Dr. Orris is heralded for using his expertise in bariatric surgery to tackle complicated and challenging cases. Performing hundreds of bariatric surgeries every year, Dr. Orris is committed to helping his patients achieve and maintain a healthy body weight.

In addition to his work at the Weight Loss Institute of Arizona, Dr. Orris has held positions at Midwestern University in Glendale and Banner Estrella Medical Center in Phoenix. Dr. Orris is also CEO of the East Valley Surgery Center in Tempe.

Personal Passion

Dr. Michael Orris recognizes the negative impact that excess weight has on society and developed a passion for helping patients not only attain but maintain, a healthy body weight. Every year, he successfully performs hundreds of weight loss surgeries. Patients benefit from his years of bariatric surgery experience and the care he brings to each and every case. Dr. Orris is well-known for his vast knowledge in the field of bariatric surgery and for accepting complicated and challenging cases.

Professional Highlights

Dr. Orris has been recognized by Phoenix Magazine as a “Top Doctor” in 2010, 2011, 2012, 2013, 2014, 2015, 2016 and 2018.




Certified by the American Osteopathic Board of Surgery Certified LAP-BAND® System Surgeon

Surgical Residency

Pinnacle Health, Harrisburg, PA.

Medical School

Philadelphia College of Osteopathic Medicine, Philadelphia, PA.

Significant Accomplishments

Fellow, American Society for Metabolic and Bariatric Surgery Held Directorships at: Bariatric Surgery, Iasis Healthcare, Banner Estrella Medical Center, West Phoenix, AZ. Held Position as Proctor, LAP-BAND Associate Clinical Professor, Midwestern University, Glendale, AZ. CEO, East Valley Surgery Center, Tempe, AZ. MBA in Healthcare Administration, St. Joseph’s University, Philadelphia, PA.


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