David Capiola, MD

Dr. Katherine Rosenwasser is the Chief of Pediatric Orthopedic Trauma at Columbia University Irving Medical Center (CUIMC) / Morgan Stanley Children's Hospital of New York (MSCHONY).She is an expert in the operative and non-operative treatment of lower extremity deformity and musculoskeletal trauma in pediatric patients from infants to adolescents. Her practice focuses on caring for children with limb-length discrepancies, clubfoot, congenital deformities, and those requiring complex lower extremity reconstructive surgeries. Dr. Rosenwassers advanced training allows her to leverage the latest surgical techniques and non-operative therapies to provide life-altering interventions for young patients.After receiving her medical degree from Columbia Universitys Vagelos College of Physicians & Surgeons, Dr. Rosenwasser remained at Columbia University Irving Medical Center and NewYork-Presbyterian where she completed residency training in orthopedic surgery, serving as executive chief resident. Following her residency, Dr. Rosenwasser completed dual fellowships in pediatric orthopedic surgery at the Hospital for Sick Children in Toronto, and pediatric limb lengthening and reconstruction under the direction of Dr. John Herzenberg at the Sinai Hospitals Ruben Institute for Advanced Orthopedics in Baltimore, Maryland.Dr. Rosenwasser is an active member of the academic orthopedic community, both as a member of numerous national organizations and as an active researcher with a variety of ongoing research projects focused on improving patient outcomes for children who require complex orthopedic care.

Michael L. Knudsen, MD, is a board certified and established orthopedic sports medicine surgeon specializing in the operative and non-operative treatment of athletes and non-athletes with shoulder and elbow injuries, including children, adolescents, and adults of all ages. He is an expert in minimally invasive arthroscopic and open surgery of the shoulder and elbow, and has expertise in advanced shoulder and elbow reconstructive surgery, including shoulder replacement surgery, rotator cuff tear surgery, shoulder instability and labral tear surgery, elbow arthroscopy, and elbow ligament reconstruction and repair. Dr. Knudsen’s practice leverages advanced imaging modalities to create personalized treatment plans and reconstructions for shoulder and elbow reconstructive surgery. He uses cutting-edge techniques for sports injuries such as PRP, ultrasound, and up-and-coming physical therapy and rehabilitation techniques such as blood flow restriction therapy. After receiving a B.S. in Biochemistry from the University of Minnesota, Dr. Knudsen completed medical school and orthopedic surgery residency at the University of Minnesota Medical School in Minneapolis. Following residency, he completed the prestigious Columbia Shoulder and Elbow Fellowship with the Department of Orthopedic Surgery at Columbia University Irving Medical Center. Dr. Knudsen returns to Columbia after starting his practice at the University of Minnesota and serving as team physician for the Minnesota Twins (Major League Baseball), Saint Paul Saints (AAA Major League Baseball), and the University of Minnesota (NCAA Division I College). During his training at Columbia, he served as an Assistant Team Physician for the New York Yankees (Major League Baseball), Rockland Boulders (Can-Am Association of Professional Baseball), and Columbia University Athletics. Dr. Knudsen currently serves as a Team Physician for Iona College where he cares for student athletes with shoulder and elbow injuries. Dr. Knudsen has a passion for research and has published dozens of peer-reviewed articles and book chapters on various topics related to shoulder, elbow, knee, and sports medicine surgery. Dr. Knudsen serves as an Associate Editor for the Journal of Shoulder and Elbow Surgery Reviews, Reports, and Techniques and actively reviews articles for the Journal of Bone and Joint Surgery, American Journal of Sports Medicine, and the Journal of Shoulder and Elbow Surgery among others. Dr. Knudsen’s ongoing research is focused on improving patient outcomes by improving the longevity and durability of shoulder arthroplasty implants and maximizing rotator cuff repair and labral tear healing rates. He is an active and engaged member of numerous professional organizations, including the American Academy of Orthopedic Surgeons (AAOS), the American Orthopaedic Society for Sports Medicine (AOSSM), and the American Shoulder and Elbow Surgeons (ASES).

Jeffrey A. Geller, MD, specializes in arthritic disorders of the hip and knee. He has extensive training in joint replacements and performs surgery using some of the latest and most advanced minimally invasive techniques. These procedures include partial knee replacements, anterior hip replacements, hip resurfacing, as well as minimally invasive hip and knee replacements. Dr. Geller performs both primary joint replacement surgery and revisions of failed or painful joint replacements, but only after considering all non-operative treatment options. He also specializes in trauma of the lower extremity including hip fractures, fractures around joint replacements, and fractures related to osteoporosis. Dr. Gellers other clinical focus is pre-emptive pain control, i.e. preventing post-op surgical pain before it can start, to enable a faster, more comfortable rehab process. Dr. Geller is actively involved in orthopedic research and education and is conducting several large-scale research projects on some of the most advanced topics in joint reconstruction. In addition to teaching medical students and residents, he lectures at national orthopedic conferences and has authored numerous textbook chapters and peer-reviewed articles.