
Brian B. Nielsen, MD
Medical School
University of Washington School of Medicine, Seattle, WA
Board Certified
American Board of Orthopaedic Surgery and Pediatric Orthopaedic Society of North America
M.D. License
Arizona, Pennsylvania
Language
English, German
Dr. Nielsen has over 20 years of expertise and specializes in Pediatric Orthopaedic surgery, scoliosis and childhood spinal deformity, limb lengthening and deformity correction. There are so many benefits from playing sports at a young age. With the benefits, there are also risks of injury. Dr. Nielsen and his team can assist you with sprains and strains, growth plate injuries, repetitive motion injuries, and other incidental injuries and get you back in the game!
Specialty
Pediatric Orthopaedic Surgery; Scoliosis and Childhood Spinal Deformity; Limb Lengthening and Deformity Correction; Sports Injuries
Residency – Orthopaedic Surgery - The Milton S. Hershey Medical Center, Penn State College of Medicine, Hershey, PA
Fellowship – Pediatric Orthopaedic Surgery - The Nemours Children's Clinic, Orlando Regional Health System, Orlando, FL
Internship – General Surgery - The Milton S. Hershey Medical Center, Penn State College of Medicine, Hershey, PA
Recognized as Top Doctor – 2009-2016
TELEHEALTH
We are now offering telehealth visits to aid in the comprehensive care for TOI patients. These visits can be scheduled through the Medical Assistant or by using the Appointment Scheduling link.

Support Team

Daniel Trimble, PA-C
Education:
- MPAS: Puerto Rico Cohort, Chatham University, Pittsburgh, PA
- BS: Biology, Utah State University, Logan, UT
Accreditation:
- National Commission on Certification of Physician Assistants (NCCPA)
TELEHEALTH
We are now offering telehealth visits to aid in the comprehensive care for TOI patients. These visits can be scheduled through the Medical Assistant or by using the Appointment Scheduling link.

The Tucson Orthopaedic Institute is so well organized and run. It is a very fast and smooth check in. The staff is helpful and courteous. I had my knee surgery there and everyone was super. Dr. Nielsen is a superb doctor. The surgery and recovery time were great. I am up and around, working and active again with no pain.... Read More
I had a total hip replacement through Tucson Orthopaedic Institute and I was extremely satisfied with all aspects of the care I received. Dr. Nielsen and his staff were very professional from the evaluation to the aftercare. Everyone I encountered that was associated with Tucson Ortho was great. The staff always made sure I understood every aspect of the operation... Read More
My son has osteochondromatosis from childhood. Dr. Nielsen performed several surgeries to shave off several bones from his body. He is the most caring doctor and my son just loves him! He visited him at his hospital stay and has a great rapport with all the staff at TMC. Everyone loves him and that made us feel that much more... Read More
Thank you Dr. Brian Nielsen, Dan Trimble, PA, and Diana Serafin. This is my 5 year old daughter's second surgery with Dr. Nielsen and the first time meeting his PA, Dan Trimble, and Diana Serafin (Patient Services Supervisor). My daughter is severely disabled and has many allergies and hypersensitivities. The care my daughter received from Dr. Nielsen, Dan Trimble and... Read More
I went to see Dr. Nielsen after seeing a few other doctors in Tucson that kept telling me nothing was wrong with my shoulder and I was in terrible pain. After seeing Dr. Nielsen he diagnosed my problem and fixed the issue through surgery. Today because of him I am pain-free and I can't thank him enough for that. If... Read More
Dan, Sierra Vista
Norman L., Tucson
Ana, Tucson
G. Holguin, Tucson
C. De La Font, Tucson