Originally from Kentucky, Dr. Mark Sumida entered private practice in Chattanooga in 1995. Dr. Sumida graduated from DePauw University as a prestigious Rector Scholar. He subsequently completed his master's degree in Forensic Science from the University of Alabama in Birmingham. After earning his medical degree from the University of Kentucky in 1988, he completed seven years of surgical training, including one year of general surgery internship and six years of orthopedic surgery residency at the University of Tennessee. He then completed his formal training with a fellowship in orthopedic surgery at Duke University.

Dr. Sumida has been board certified by the American Board of Orthopedic Surgeons since 1996. Nationally, he is a member of numerous professional societies including the American Academy of Orthopedic Surgeons, Piedmont Orthopedic Society, Tennessee Orthopedic Society, and American Academy of Orthopedic Foot and Ankle Surgeons. Throughout his career, he has presented several lectures at national meetings and has published in the orthopedic literature. Dr. Sumida volunteered his time as team physician for the Notre Dame High School football team and served as team doctor for the U.S. National Junior Wildwater Canoe and Kayak Team at the World Championships in the Czech Republic. He has also volunteered his services for every Ironman Triathlon hosted in Chattanooga since its beginnings, including two World Championship Ironman competitions.