Timothy J. Bonatus, DO - Northern Arizona Ortho
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Timothy J. Bonatus, DO

Orthopedic Traumatology, Adult Joint Reconstruction


Fellowship: U.C. Davis Medical Center

Residency: U.S. Naval Hospital Oakland

Internship:U.S. Naval Hospital Oakland

Doctoral: Chicago College of Osteopathic Medicine

Personal Quote

“I have a personal initiative to improve the healthcare delivery system in our community by driving value, accessibility and high-quality care to the people who live here. I am involved in a number of initiatives and leadership roles advocating for clinical synergies so patients receive the care they deserve and the experience they expect.”

Procedures & Areas of Interest

  • Arthroscopic Surgery
  • Arthritis Care
  • Hip & Knee Replacement
  • Hip & Knee Reconstruction
  • Arthritis Care
  • Minimally Invasive Surgery
  • Treatment for Osteoarthritis
  • Treatment for Wear-and-Tear of Joints

Professional Biography

Timothy Bonatus, DO is a fellowship-trained orthopedic surgeon specializing in Orthopedic Traumatology and Total Joint Reconstruction Surgery.


Dr. Bonatus has been caring for patients at our Flagstaff location since 1993, managing his practice through our Arthritis & Fracture Care Center. Trained in Robot-Assisted and Computer Navigated surgery, Dr. Bonatus’ primary interests and surgical procedures include treating patients for arthritis, fractures, degenerative diseases of the hip and knee, minimally-invasive joint replacement surgery and total joint reconstructive surgery.


Prior to moving to Flagstaff, Dr. Bonatus served as Medical Officer on the USS California. He received his post-graduate medical education from US Naval Hospital Oakland in General Surgery and residency in Orthopaedic Surgery. He was Chief of Orthopaedics at Camp Pendleton during Desert Storm. Dr. Bonatus completed his Orthopedic Traumatology Fellowship from UC Davis Medical Center. He earned his doctoral degree from Chicago College of Osteopathic Medicine and his undergraduate degree from the University of California – San Diego.


Dr. Bonatus is active in the medical community, holding professional memberships with the American Academy of Orthopaedic Surgeons, Arizona Medical and Osteopathic Medical Associations and the Ortho Trauma Association.


Professional Affiliations

  • American Academy of Orthopaedic Surgeons
  • Arizona Medical Association, Industrial Commission Representative
  • Arizona Osteopathic Medical Association
  • Arizona Orthopaedic Society, Board Member
  • AT Still University School of Osteopathic Medicine, Faculty
  • Orthopaedic Trauma Association

Leadership Roles

  • Flagstaff Medical Center, Orthopaedic Trauma Director
  • Flagstaff Medical Center Surgical Services Executive Committee, Co-Director
  • Northern Arizona Orthopaedics, President

Research, Publications & Presentations

Peer-Reviewed Journal Articles:
Unreamed Titanium Nails in the Treatment of Open Tibial Fractures; Bonatus TJ. Clin. Orthop. 399:58-64, 06/97.

Traumatic anterior dislocation of the radial head in an adult. Bonatus T, Chapman MW, Felix N. J Orthop Trauma. 1995;9(5):441-4. PubMed PMID: 8537850.

Bonatus TJ, Alexander AH. Patellar fracture and avulsion of the patellar ligament complicating arthroscopic anterior cruciate ligament reconstruction. Orthop Rev. 1991 Sep;20(9):770-4. PubMed PMID: 1945513.

Posttraumatic Aeromonas hydrophila osteomyelitis. Bonatus TJ, Alexander AH. Orthopedics. 1990 Oct;13(10):1158-63. Review. PubMed PMID: 2251235.
Treatment of Scaphoid Nonunion with Ruse Bone Graft; Bonatus TJ. Orthop Trans (JBJS), 14:130, 90.

Proximal Row Carpectomy: A Multicenter Study, Bonatus TJ. Orthop Trans (JBJS), 14:129, 90.

Open Intrauterine Amputation of the Leg Due to Annual Constricting Bands: A Case Report & Review
of the Literature; Bontaus TJ, Orthopaedic Review, 89.

Solitary plasmacytoma of the cuboid. Foot Ankle. Bonatus TJ, Burkus JK. 1988 Jun;8(6):344-9. PubMed PMID: 3402854.

Dercum’s disease (adiposis dolorosa). A case report and review of the literature. Bonatus TJ, Alexander AH. Clin Orthop Relat Res. 1986 Apr;(205):251-3. PubMed PMID: 3698384.

Non-Published Peer-Review Journal Articles:
Bonatus TJ. Repeat Russe Graft for Failed Treatment of Scaphoid Nonunion; Journal of Hand Surgery.


Poster Presentations:

The Use of Unreamed Titanium Nails in Open Tibia Fractures; Bonatus TJ, Poster Exhibit, Orthopaedic Trauma Association Meeting; AAOS Annual Meeting, USA, Georgia, Atlanta. 10/95.

Repeat Russe Graft for Persistent Nonunion. Bonatus TJ. Poster Exhibit, AAOS 59th Annual Meeting, USA, Washington,
D.C., 02/92.

Oral Presentations:

Unreamed Tibial Nailing in Open Tibia Fractures; Bonatus TJ. Arizona Orthopaedic Association. USA, Arizona. 10/94.

The Effect of Tourniquet Ischemia on Pulmonary Function in Patients With Femoral Shaft Fractures Treated with Reamed Intramedullary Nailing; Bonatus TJ. Arizona Orthopaedic Association. USA, Arizona. 10/94.

Repeat Russe Graft for Persistent Scaphoid Nonunion. Bonatus TJ. Resident Research Day, Naval Hospital, USA, California, Oakland. 06/89; Society of Military Orthopaedic Surgeons Meeting., USA, California, Oakland. 12/89.

Proximal Row Carpectomy. Bonatus TJ. Resident Research Day, Naval Hospital, USA, California, Oakland. 06/89.

Treatment of Scaphoid Nonunion in Active Duty Population. Bonatus TJ. Association of Military Osteopathic Physicians & Surgeons Annual Meeting, USA, California, San Diego. 03/89.

Treatment of Scaphoid Fracture & Nonunion with Russe Bone Graft; Bonatus TJ. Society of Military Orthopaedic Surgeons; USA, Virginia, Williamsburg, 12/88.

Arthroscopic Stapling for Anterior Shoulder Instability; Bonatus TJ. University of California -Grand Rounds, USA, California, San Diego. 10/88.

Thermography as an Objective Means of Evaluating Low Back Pain & Sciatica. Bonatus TJ. Annual Resident Seminar, 06/85.

A Review of Total Elbow Arthroplasty. Bonatus TJ. Annual Resident Seminar, Naval Hospital, USA, California, Oakland. 06/86.

Total Shoulder Arthroplasty. Bonatus TJ. University of California -Grand Rounds, USA, California, San Diego. 02/86.

Patient Testimonials

“Dr. Bonatus is absolutely excellent and I would highly recommend him to anyone! Not only is he knowledgeable and highly skilled, he displayed a genuine concern for me, spent appropriate amounts of time explaining the procedures I had and followed up afterwards. If you live in northern AZ, don’t go anywhere else!” – S.M.

“That was likely the best Dr. visit I’ve ever had. Everyone there at NAO is top-flight professional.” – J.J.

“During my pre-op appointment, Dr. Bonatus asked me if I had any questions. I said “Yea, how many total hip replacements have you done?” He answered “Over 2,000.” My response: “Ok, we are good to go then!” To date (13 days after total hip replacement) I’m doing fantastic according to both Dr. Bonatus’ PA and the Physical Therapist. It is SO nice to no longer hurt with a bad hip! This facility is GREAT!” – L. Mitchell