OSPI offers the top orthopedic surgeons in Gilbert AZ and the East Valley. Drs. Mahoney, Macqueen, Stewart and Clouse offer minimally invasive General, Sports and Joint Replacement expertise.

Physical Therapy

Whether you are pre or post-operative, OSPI’s East Valley physical therapy team works with you on both active and passive treatments. Your will be in the best hands with our licensed physical therapists!


The Gilbert chiropractors at OSPI offer a plethora of nonoperative pain relief options such as manipulations, laser therapy, physiotherapy and electrical stimulation.

Family Practice

OSPI offers comprehensive family practice services including allergy testing, BHRT, medical weight loss, aesthetics and full check ups.

Medical Weight Loss

Patients routinely experience dramatic, healthy weight loss with the customized programs at OSPI. The programs combine nutrition, exercise and prescription weight loss options.

Performance Training

OSPI’s integrated team of healthcare providers work with both amateur and professional athletes to maximize one’s performance with sport specific programs.

Pain Management

OSPI’s Board Certified, Fellowship Trained pain doctor offers both medication management and interventional procedures with exceptional outcomes!

Gregory Stewart, MD

Board Certified Orthopedic Surgeon, General and Sports Orthopedics

gregory_detailAn Arizona native, Dr. Stewart grew up in Mesa; graduating Summa Cum Lade from Arizona State University with a degree in Exercise Science. During his undergraduate studies he took part in the athletic training program at ASU and assisted in the care of athletes.

He attended medical school at the University of Texas Southwestern at Dallas and elected to remain there to complete his Orthopedic Surgery training. After residency, Dr. Stewart completed a fellowship in Sports Orthopedics with the University of California San Diego, San Diego State University and the San Diego Padres.

Along with being Board Certified by the American Academy of Orthopedic Surgeons, Dr. Stewart is a member of the American Orthopedic Society of Sports Medicine and participates in the care of local high school, and community college athletic programs. He also serves as an associate provider for the San Diego Padres minor league system. He enjoys spending time with his family and stays active playing sports of every kind.

“Having spent much of my childhood in the doctor’s office for various injuries and ailments, I naturally became fascinated with medicine. That interest only grew as I entered college and pursued preparations for medical school. As I explored various options in the medical field, I was thrilled to discover I could combine my love of sports and activity with what has always seemed to be an innate desire to fix things. I love my job; and the thing that gives me the most joy is seeing patients get back to doing the things the enjoy most in life. It doesn’t matter if it is a high level athlete or the weekend warrior, nothing is better then watching patients return to doing the things they thought they may have to give up.”

Overview of Common Knee Sports Injuries

In 2014, there were 10.4 million visits to a doctor’s office because of knee injuries. The knee is a complex joint with multiple components. This complexity makes it vulnerable to a variety of injuries. Knee… Read more >

Physical Therapy After Total Hip Replacement

One of the most commonly performed orthopedic surgeries is a total hip replacement (THR). The surgical techniques and prosthesis used for a THR have improved over the years, allowing the patient to now achieve optimal… Read more >

Recovery after Anterior Approach Total Hip Replacement

Anterior hip replacement is a less invasive approach to hip joint surgery. With the anterior approach to total hip replacement, the orthopedic  surgeon in Gilbert AZ accesses the joint from the anterior (front) of the… Read more >