Dr. Nathan F. Miller

L. Christopher Grandizio, DO, is an orthopaedic surgeon who specializes in hand, wrist, shoulder and elbow surgery. Dr. Grandizio is a Professor of Orthopaedic Surgery at Geisinger Commonwealth School of Medicine and serves as the of the Chief of Shoulder & Elbow Division for the Geisinger Musculoskeletal Institute. Dr. Grandizio is an expert in the treatment of peripheral nerve compression (including carpal tunnel syndrome and cubital tunnel syndrome), upper-extremity trauma and fractures, sports injuries, and shoulder and elbow replacements. In addition, he specializes in complex reconstructive procedures in the upper-limb, including tendon transfers for shoulder, elbow and hand conditions.|After completing his Orthopaedic Surgery Residency at Geisinger, he went to on to complete a one-year fellowship in upper-extremity surgery at the Cleveland Clinic. Upon returning to Geisinger, he founded the Geisinger Upper-Extremity Research Fellowship, where he has mentored numerous international and US fellows. In 2021, he was selected to participate in the Young Leaders Program for the American Society for Surgery of the Hand (ASSH).|Dr. Grandizio maintains a strong interest in both research and education. He has published over 100 peer-reviewed research articles. As an expert in the management of complex elbow instability, Dr. Grandizio has been invited to give numerous national and international presentations on topics ranging from upper-extremity trauma to technology in healthcare. He serves as a peer-reviewer for multiple orthopaedic journals and is an Associate Editor for the Journal of Hand Surgery. As part of his commitment to education, he is heavily engaged in professional societies and is involved in multiple committees and leadership positions within the ASSH. In addition, Dr. Grandizio is one of the few upper-extremity surgeons who is a member of both the ASSH and ASES.|A former member of Bucknell University’s NCAA Division I baseball team, Dr. Grandizio has a long history in athletics and enjoys helping his patients return to doing what they love. He specializes in elbow ulnar collateral ligament repair / reconstruction (Tommy John Surgery) and has a passion for working with throwing athletes.|In his spare time, he enjoys spending time with his family, coaching baseball and reading. Dr. Grandizio is rated as a Distinguished provider by MediFind in the treatment of Carpal Tunnel Syndrome. His top areas of expertise are Carpal Tunnel Syndrome, Mononeuritis Multiplex, Trigger Thumb, Osteotomy, and Endoscopy.

Joel Klena, MD, is chief of the Division of Hand and Microvascular Surgery for the Geisinger Musculoskeletal Institute, as well as program director for the Geisinger Orthopaedic Surgery Residency. He assumed this role in 2017 after being the associate residency director for eight years.|Dr. Klena received a BS with honors from the United States Merchant Marine Academy (USMMA) at Kings Point, N.Y., graduating ninth in his class with dual degrees in marine engineering and marine transportation. His time at the USMMA included service in the Gulf War conflict and captaining the Academy’s NCAA Division I Rugby Team.|After fulfilling his naval and maritime commitments, he attended medical school at the State University of New York’s Upstate Medical College in Syracuse and completed orthopaedic surgery residency training at Geisinger Medical Center. He returned to Syracuse for a fellowship in hand and upper extremity surgery, including time at Texas Scottish Rite Children’s Hospital in Dallas.|Dr. Klena serves on the resident education committee for the American Society for the Surgery of Hand and is a member of the American Orthopaedic Society. He has extensive peer-reviewed publications within the hand literature. He has provided guidance for resident research efforts, with a particular focus on upper extremity trauma, minimally invasive surgical techniques and resident education.|In 10 years with Geisinger, Dr. Klena has led the hand division from a single surgeon based in Geisinger’s central region to the successful recruitment and geographic expansion of six hand surgeons providing care for patients throughout Geisinger.|The motto of his undergraduate alma mater best summarizes his approach to leadership and his dedication to service: “Acta non verba” or “Deeds, not words.”|His interests include family, women's lacrosse, fly fishing and Pittsburgh sports. Dr. Klena is rated as a Distinguished provider by MediFind in the treatment of Carpal Tunnel Syndrome. His top areas of expertise are Carpal Tunnel Syndrome, Mononeuritis Multiplex, Dupuytren Contracture, Trigger Thumb, and Endoscopy.

Jonas Matzon is a Hand Surgeon and an Orthopedics provider in Sewell, New Jersey. Dr. Matzon is rated as a Distinguished provider by MediFind in the treatment of Carpal Tunnel Syndrome. His top areas of expertise are Carpal Tunnel Syndrome, Trigger Thumb, Mononeuritis Multiplex, Nerve Decompression, and Trapeziectomy. Dr. Matzon is currently accepting new patients.