An orthopedic physician extender provides health care in addition to or in place of an orthopedic physician. Professionals who perform these duties can also be known as nurse practitioners or physician assistants. As an orthopedic specialist, you assess, diagnose, treat, and assist patients with bone, tendon, or ligament issues. You may have additional responsibilities depending on the needs of each patient. Some physician extenders help with surgery or oversee the rehabilitation under the guidance of an orthopedic physician. As a physician extender, you can diagnose and treat patients independently, but you coordinate with a physician when necessary.