Orthopedic surgery or orthopedics is the branch of surgery concerned with conditions involving the musculoskeletal system. Orthopedic surgeons use both surgical and nonsurgical means to treat musculoskeletal trauma, sports injuries, degenerative diseases, infections, tumors, and congenital disorders.
From casting a broken bone to surgery for a complex orthopedic condition, it is important to find an orthopedic specialist who provides you with the best possible care. Our surgeons are leaders in the field and experts in the use of innovative techniques and minimally invasive procedures to correct bone and musculoskeletal disorders.
Meet our Orthopedic Surgery Team
Matthew J. Enna, M.D.
Dr. Enna has unique experience in advanced techniques in arthroscopic, hand, and trauma surgery. He is one of a select few physicians in California to achieve subspecialty certification in both hand surgery and sports medicine.
An interest in both the humanities and pre-medical education led him to Washington University in Saint Louis, where he earned a bachelor’s degree in English Literature in 1997. He spent his senior year of college at Oxford University, where he studied Shakespeare, Dickens and Leonardo da Vinci. He matriculated at Tulane University School of Medicine in 1997. Upon graduating from Tulane in 2001, he moved to Providence, Rhode Island, where he performed his general surgery internship and orthopedic surgery residency at Brown University. After completing his residency in 2006, he performed a one-year fellowship in orthopedic trauma at Brown. During his training at Brown, he was an assistant team physician for the Brown University varsity football, hockey and lacrosse teams, and for the Providence Bruins hockey team.
After his trauma fellowship at Brown, Dr. Enna completed an additional fellowship — in hand and microsurgery — at UCLA. In 2008, he joined the Sansum Clinic in Santa Barbara where he gained his valuable experience in advanced techniques in arthroscopic, hand, and trauma surgery.
Moosa Kohanim, M.D.
Dr. Kohanim’s expertise in orthopedic surgery includes treatment of a variety of conditions, including strains and sprains of various musculoskeletal systems, conservative and surgical treatment of various fractures, repair and reconstruction of ligaments and tendons and arthroscopic surgery of various joints, specifically knee and shoulder, and treatment of sports-related injuries.
After graduating from the American medical school, Pahlavi University in Iran, Dr. Kohanim completed one year of internship at Mount Sinai Hospital in Minneapolis, Minnesota. He also completed one year of surgical residency at the University Hospital of West Virginia.
Dr. Kohanim did his orthopedic residency training and a one-year fellowship in orthopedic research at the Hospital of the University of Pennsylvania. While there, he conducted some groundbreaking research with Dr. Zachary Fridenberg. They discovered and confirmed the effectiveness of electrical bone stimulation in the healing of human fractures, which resulted in the pioneering use of the modern electrical bone stimulation unit to enhance bone healing.
Electrical bone simulation is now in use in orthopedic treatment worldwide.
Dr. Kohanim served as Chairman and Professor of Orthopaedic Surgery at Pahlavi University in Iran. Upon returning to the United States, he opened a private practice in the city of Lawndale, California. Dr. Kohahim is particularly knowledgeable in the treatment of work-related injuries and the ever-changing laws related to workers’ compensation. He is a member of the majority of the Medical Provider Networks (MPN), as well as a Qualified Medical Evaluator (QME), and Agreed Medical Evaluator (AME) for medical-legal evaluation of workers’ compensation cases (injured workers).
A board certified orthopedic surgeon and a Diplomate of the American Board of Orthopaedic Surgery, Dr. Kohanim is a member of the American Academy of Orthopaedic Surgeons, California Orthopaedic Association, Los Angeles County Medical Association, Union of American Physicians and Dentists, Lifetime Member of American Medical Association (AMA) and California Society of Industrial Medicine and Surgery. He is a QME (Qualified Medical Evaluator) and an AME (Agreed Medical Evaluator).
Dan Geller, M.D.
A native of NYC, Dr. Dan Geller is a Board Certified, surgically-trained foot and ankle surgeon focusing on sports injuries, post-traumatic reconstruction, and chronic conditions of the foot and ankle. Dr. Geller earned his medical degree from the New York College of Podiatric Medicine. Following his medical school training, he completed three years of residency training at St. Luke’s Hospital in Phoenix, Arizona, with an emphasis in foot and ankle surgery, reconstruction, trauma, joint replacement, stress fractures and sports medicine/injuries.
Post residency, Dr. Geller returned to NYC and went into private practice where he built a client base that included many professional athletes and dancers. During his ten years in NYC, he worked closely with the NYC Ballet, and became the team podiatrist for many of New York’s premier running, cycling and triathlon teams.
The practice is committed to excellence in treating patients, both surgically and non-surgically, for the entire range of foot and ankle injuries and disorders by offering the most innovative treatments.
Dr. Geller continues to lecture, publish articles and work as a television consultant for various networks. He is coming out with a book for running injuries later this year.
In his free time, Dr. Geller continues to run marathons and compete in Ironman triathlons.