Minimally Invasive Surgery (MIS)

MIS Joint Replacement offers important advantages, requiring smaller incisions and potentially causing less trauma, shorter hospital stay, faster recovery and less scarring than traditional techniques.

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Computer-Assisted Surgery (CAS)

Computer-assisted technology has made it possible for your orthopaedic specialist to navigate joint replacement procedures with a level of accuracy so precise it may improve the results of your surgery.

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Total Joint Replacement (TJR)

Total joint replacement is a surgical procedure in which certain parts of an arthritic or damaged joint are removed and replaced with an artificial joint, which is designed to move just like a healthy joint.

Learn more about Total Joint Replacement »

Dr. Aaron M. O'Brien

Board-Eligible Orthopaedic Surgeon
Only Fellowship Trained Foot and Ankle Orthopaedic Surgeon in Southern Utah

"As an orthopedic surgeon, my primary focus is to help patients improve their health and get back to their desired activities. I listen to my patients and understand their goals so we can develop a personalized plan. Not all orthopedic problems require surgery and most will improve with nonsurgical treatments.

I specialize in treating foot and ankle problems among all age groups in addition to all general orthopedic conditions. I have trained under world-renowned orthopedic surgeons. With this training, I bring to Southern Utah a new approach to treating the lower extremity with a better understanding of the entire body, as well as medical conditions that may affect patients’ overall health.

I was born and raised in Utah. I grew up spending most of my time in the outdoors enjoying the beauty this state has to offer. I want all of my patients to have the same opportunity by improving their health and helping them return to an active lifestyle."


  • Undergraduate: Utah Valley University, Orem, UT
  • Medical: University of Iowa Carver College of Medicine, Iowa City, IA


  • Orthopaedic Residency: University of Texas Health Science Center at San Antonio, San Antonio, TX
  • Foot and Ankle Surgery Fellowship: The Cleveland Clinic, Cleveland, OH

Professional Affiliations

  • American Academy of Orthopedic Surgeons
  • American Orthopaedic Foot and Ankle Society
  • Utah State Orthopaedic Society
  • Alamo Orthopaedic Society
Request an Appointment (435) 628-9393
Dr. Aaron M. O'Brien

Aaron M. O'Brien, MD

Dr. O'Brien specializes in the treatment of a variety of orthopaedic conditions and performs several orthopaedic procedures including:

  • All Foot and Ankle Conditions
  • Foot and Ankle Athletic Injuries
  • Arthritis of the Foot and Ankle
  • Ankle Replacements
  • Fracture Care
  • Diabetic Foot Conditions
  • Foot Deformities