Foot and ankle surgery is a sub-specialty of orthopedics and podiatry that deals with the treatment, diagnosis and prevention of disorders of the foot and ankle. The typical training of an orthopedic foot and ankle surgeon consist of four years of college, four years of medical school (D.O.) or (M.D.), one year of surgical internship, 4–5 years of orthopedic training and an optional 1 year fellowship in foot and ankle surgery. Training for a podiatric foot and ankle surgeon consists of four years of college, four years of podiatric medical school (D.P.M.), 3–4 years of a surgical residency and an optional 1 year fellowship. One can also make the distinction between a podiatric and orthopedic foot and ankle surgeon: an orthopedic surgeon has an Doctor of Medicine or Doctor of Osteopathic Medicine medical degree and training that encompasses both orthopedic residency and an optional 6-month to one year of fellowship training specific in techniques of foot and ankle surgery, while the training of a Doctor of Podiatric Medicine consist of a podiatric medical degree and three to four-year residency training specific to foot and ankle medicine and surgery, with an optional additional 1-year fellowship in foot and ankle trauma, reconstruction, or diabetic limb salvage.