At NAO, pain and mobility are restored for those suffering from arthritis, injury and chronic conditions of the hip and knee. The Arthritis and Fracture Care Center team includes othopaedic surgeons, Dr. Timothy Bonatus, Dr. Bourck Cashmore, Dr. Brandon Clark and Dr. Cody Martin.  These leaders in hip, knee and trauma care are trusted for their kindness and expertise and known for their quality outcomes. Physician assistants Greg Harris, PA-C, and Ray Lieber, PA-C, provide medical care, examine, diagnose, treat and assist in surgery. Together, they provide exceptional quality care that NAO has been recognized for for more than 46 years.

The Center is designed around innovative and minimally invasive surgical techniques to treat conditions surrounding arthritis, osteoarthritis and osteoporosis. The entire care team is dedicated to a common goal – to quickly return patients to their life journeys while enjoying better functionality, mobility and much less pain.

At the Arthritis and Fracture Care Center, patients will be provided care for a wide spectrum of conditions and ailments, including care for:

  • Osteoporosis and other degenerative conditions
  • Chronic hip pain
  • Hip fractures, hip impingement, bursitis
  • Labral tears, scar tissue, bony buildup
  • Arthritis and pain of the hip area
  • Chronic knee pain
  • Arthritis and pain of the knee area
  • Trauma care for severe fractures

Knee Surgery

Chronic knee pain caused by arthritis or injury can make it hard to perform daily activities, such as walking or climbing. If painful damage to the knee joint has limited your mobility and affected overall quality of life, your doctor may recommend knee replacement surgery.

Hip Surgery – Including Anterior Hip Approach

Whether you suffer from osteoarthritis, rheumatoid arthritis or a fracture to the hip joint, the Center’s care team has the skills and experience required to offer total and partial hip replacement surgery to relieve hip pain and restore quality of life. Our team is also expertly skilled in the treatments for athletic, sports and running injuries to the hips and knees. Our surgeons are versatile at the most advanced surgical techniques, including Anterior Hip, a tissue-sparing alternative to traditional hip replacement, providing the potential for less pain, faster recovery and improved mobility because the muscle tissues are spared during the surgery.

Patient Education



The Arthritis and Fracture Care Center Team

Expert Doctors in this Area

Expert PAs and NPs in this Area of Expertise

Tara Gordon, PA-C

Tara Gordon, PA-C

Greg Harris, PA-C

Greg Harris, PA-C

Ray Lieber, PA-C

Ray Lieber, PA-C