He has special interests in joint replacement and other surgeries of the shoulder, hip and knee. Dr. Shaffer is orthopedic medical director at Wyoming Medical Center and Casper Orthopedic Clerkship director for the University of Washington School of Medicine. He is the orthopedic director for the Frontiers in Wyoming Medicine Conference and has been invited to educate other physicians in orthopedic care. His interests include the treatment of fractures and osteoporosis, perioperative pain and surgical process improvement. Sammie Stephens N.P.