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Matt M. Diesselhorst, M.D.

Sports Medicine Physician & Orthopedic Surgeon located in Oklahoma City, Oklahoma
Dr. Matt Diesselhorst, Diesselhorst Sports & Orthopedics

About Dr. Diesselhorst

Matt M. Diesselhorst, M.D., was raised in rural Northwest Oklahoma, graduated from Fairview High School, and received his Bachelor of Science in Zoology/Biomedical Sciences from the University of Oklahoma. Matt then earned his medical degree from the University of Oklahoma, College of Medicine and completed his internship and residency at the University of Oklahoma Health Sciences Center, Department of Orthopedic Surgery and Rehabilitation.

Dr. Diesselhorst thereafter continued his specialty training by completing the Lake Tahoe Orthopedic Sports Medicine Fellowship. He is a member of the American Academy of Orthopedic Surgeons, the Arthroscopy Association of North America, and the American Orthopedic Society for Sports Medicine.

Dr. Diesselhorst is a Board Certified Orthopedic Surgeon with a Subspecialty Certification in Orthopedic Sports Medicine whose practice practice includes Orthopedic Trauma (Adult & Pediatric), Joint Replacement, and Diagnostic & Interventional Ultrasound.

Dr. Diesselhorst has a special interest in Orthopedic Sports Medicine and the care of athletes, and has advanced training in Arthroscopic Surgery of the Shoulder, Knee, and Hip, including Hip Labrum Repair Surgery.

Board Certification

  • American Board of Orthopedic Surgeons (ABOS)
  • Subspecialty Certificate in Orthopedic Sports Medicine


  • Oklahoma State Medical License


2012-2013 | Orthopedic Surgery Sports Medicine Fellowship

  • Lake Tahoe Orthopedic Sports Medicine Fellowship | Zephyr Cove, NV

2007-2012 | Orthopedic Surgery Residency

  • Department of Orthopedic Surgery & Rehabilitation, University of Oklahoma Health Sciences Center | Oklahoma City, OK

2003-2007 | Doctorate of Medicine

  • University of Oklahoma College of Medicine | Oklahoma City, OK

1998-2003 | Bachelor of Sciences in Zoology Biomedical Sciences

  • University of Oklahoma | Norman, OK

Professional Society Membership

  • American Orthopaedic Society for Sports Medicine (AOSSM)
  • Arthroscopy Association of North America (AANA)
  • American Academy of Orthopedic Surgeons (AAOS)


  • Diesselhorst MM, Deck JW, Davey JP. Compartment Syndrome of the Upper Arm After Closed Reduction and Percutaneous Pinning of a Supracondylar Humerus Fracture. J Pediatr Orthop. 2013 Jun 14.

  • Diesselhorst MM, Rayan GM, Pasque CB, Peyton Holder R. Survey of upper extremity injuries among martial arts participants. Hand Surg. 2013;18(2):151-7.

  • Diesselhorst MM, Finnoff JT. Hip Labral Tears- Chapter 56. Essentials of Physical Medicine & Rehabilitation. Third Edition. 2015; 291-295.

  • Meadow JR, Diesselhorst MM, Finnoff JT, Swanson BL, Swanson KE. Clinical and Sonographic Evaluation of Bicortical Button for Proximal Biceps Tenodesis. American Journal of Orthopedics. July/August 2016. E283-28

About John Lazenby III

John Lazenby III, MHS, PA-C received his Bachelor of Science in Natural Science Education from Northwestern Oklahoma State University in 2017, then his Master of Health Science in Physician Associate Studies from the University of Oklahoma Health Science Center in 2019. During his time at OU, he performed clinical rotations all over the state of Oklahoma.

After graduation, John worked briefly as a natural science educator before working in gastroenterology, dermatology, general surgery, and urgent care at McAlester Regional Health Center over the course of several years. He’s now a member of the orthopedic surgery team here at Diesselhorst Sports and Orthopedics.

John is a member of both the Oklahoma Academy of Physician’s Assistants (OAPA) and the American Academy of Physician Assistants (AAPA). He also holds a wide variety of certifications and licenses, including a DEA license, an OBNDD Certificate, Advanced Cardiac Life Support, and more.


2017-2019 | Master of Health Science – Physician Associate Studies

  • University of Oklahoma Health Science Center
    College of Medicine, Department of Family Medicine | Oklahoma City, Oklahoma

2015-2017 | Bachelor of Science in Education – Natural Science

  • Northwestern Oklahoma State University | Alva, Oklahoma

2014-2015 | Associate of Science

  • Oklahoma Panhandle State University | Goodwell, OK

2012-2014 | Associate of Art

  • Northern Oklahoma College | Enid, OK


  • Oklahoma State Medical License
  • DEA License

Board Certification

  • OBNDD Certificate
  • NCCPA Board Certificate
  • Advanced Cardiac Life Support (ACLS)
  • Oklahoma State Department of Education Teaching Certificate
  • Pediatric Advanced Life Support (PALS)
  • Neonatal Resuscitation Program (NRP)

Professional Society Membership

  • Oklahoma Academy of Physician Assistants (OAPA)
  • American Academy of Physician Assistants (AAPA)