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Availability last updated 02/16/2026
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ABOUT DR. THOMAS KREMEN
Thomas J. Kremen, MD is a board-certified orthopedic surgeon with additional subspecialty certification in Sports Medicine and Shoulder Surgery. He has served as team physician all over the country, and around the world, helping athletes across the globe stay at the top of their game. He has served as team physician for numerous organizations including Duke University Intercollegiate Athletics, US Men's National Team Soccer, LA Galaxy (MLS), USA Basketball, and the USA Olympic Swimming Team. He currently serves as a team physician for the UCLA Bruins NCAA Division I intercollegiate athletics teams, the chair of USA Swimming's Sports Medicine and Science Committee, the head team physician for the South Bay Lakers (NBA G-League), and an associate team physician for the Los Angeles Lakers (NBA).
Dr. Kremen has devoted his career to helping patients of all sports levels maintain active lifestyles. Using the latest orthopedic techniques and science, Dr. Kremen helps athletes in Los Angeles recover quickly from injury, getting them back into the game stronger than ever. With his eyes on the future of sports medicine, Dr. Kremen is a federally-funded clinician-scientist who is actively involved in translational research aimed at improving the treatment of soft tissue musculoskeletal injuries (tendons, ligaments, cartilage, etc.).
From shoulder problems to debilitating knee injuries, Dr. Kremen understands the added stresses that active lifestyles place on the human musculoskeletal system. His goal is to not only help his patients overcome their injuries, but also provide essential preventive care to avoid re-injury down the road.
Dr. Kremen earned his bachelor’s degree from the University of California, Santa Barbara in 1998 where he was also captain of the NCAA Division I men’s swimming team. He earned his medical degree from the David Geffen School of Medicine at the University of California Los Angeles (UCLA) in 2006 and then continued at UCLA where he completed his Orthopedic Surgery Residency Training in 2012.
Between 2008 and 2009, Dr. Kremen honed his research knowledge as a California Institute for Regenerative Medicine Clinical Fellow and in 2013, he completed an Orthopedic Sports Medicine and Shoulder Surgery fellowship at Duke University in Durham, North Carolina. Following his fellowship at Duke, Dr. Kremen accepted a position at Cedars-Sinai Medical Center and their newly formed orthopaedic program where he worked for 5 years prior to returning to UCLA in 2018.
Dr. Kremen stays up to date in his field through memberships in the American Academy of Orthopaedic Surgeons, the Orthopaedic Research Society, the Arthroscopy Association of North America, and the American Orthopaedic Society for Sports Medicine, to name just a few.
In his pursuit of finding the best treatments, Dr. Kremen regularly participates in research studies, and he has published and presented dozens of research papers at both national and international meetings. His research interests include biomechanical studies of shoulder and knee reconstruction procedures as well as innovative biologic therapies to enhance tissue healing and regeneration after musculoskeletal injuries.
Dr. Kremen is currently a full-time faculty member at the University of California, Los Angeles where he provides his patients with state-of-the-art care.
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Dr. Thomas Kremen, MD
Orthopedic Surgeon
100 Medical Plaza
Suite 170
Los Angeles, CA 90095
Jonathan H. Koenig, MD, is a Board Certified, fellowship-trained orthopaedic surgeon at Los Angeles Pediatric Orthopaedics serving the Brentwood community on the Westside of Los Angeles. Though Dr. Koenig specializes in treating children and young adults, he’s happy to help any patient who still feels young at heart.
Growing up on Long Island in the suburbs of New York City, Dr. Koenig was a tri-sport athlete who went on to play varsity lacrosse at Yale University in New Haven, Connecticut. He graduated from Yale with a degree in the history of science and medicine. He then returned to New York City to earn his medical degree at the Albert Einstein College of Medicine in the Bronx.
Dr. Koenig completed a five-year orthopaedic surgery residency at Lenox Hill Hospital in Manhattan's Upper East Side — home of America’s first official sports medicine department. His training included rotations at world-leading institutions like Boston Children’s Hospital, R Adams Crowley Shock Trauma Center in Baltimore, Maryland, and Memorial Sloan Kettering Cancer Center in New York City. Dr. Koenig served as chief resident during his final year and completed a traveling fellowship at The Royal Children’s Hospital in Melbourne, Australia.
Leaving New York City for sunny Southern California, Dr. Koenig finished a one-year fellowship in pediatric orthopedics and scoliosis surgery at the world-renowned Rady Children’s Hospital-San Diego. He’s honored to bring his wealth of knowledge and extensive experience to the Westside of Los Angeles, where he resides with his wife, Dani - a native Angeleno. They enjoy spending time with their young daughter - Harlow, newborn son - Hudson, as well as their furst born - Woody, a golden retriever.
As a former athlete and orthopaedic patient himself, Dr. Koenig has a personal understanding of all aspects of the care he provides. From sports-related injuries like ACL tears or patella dislocations as well as broken bones or limb deformities and joint pains, he makes sure that every patient receives prompt, highly individualized treatment. He’s also happy to provide emergency care for traumatic injuries as they arise.
Dr. Jonathan Koenig, MD
Orthopedic Surgeon
11710 Wilshire Boulevard
Los Angeles, CA 90025
Welcome to the practice of William Sheppard, MD, MPH, in Santa Monica, California. As an expert orthopedic & neurological spine surgeon, I and my staff use our years of spine surgery experience to deliver lasting pain relief, improved mobility, and a better quality of life to our patients.
Our office is inside the UCLA Health Spine Center. Ample on-site parking is available, and we offer cutting-edge diagnostics, including X-rays, MRIs, and CT scans.
The collaborative treatment process we use emphasizes patient participation and feedback. Instead of making blanket treatment recommendations, we dedicate time to our patients, listening to their symptoms, concerns, and goals. We use that information to develop outcome-oriented treatment plans.
People from all over Los Angeles visit us for our spine expertise. We regularly diagnose and treat common back problems, including degenerative spinal disorders like scoliosis, spinal stenosis, and spinal disc herniation.
Rather than relying on open surgery, we primarily recommend minimally invasive surgery. This looks different for each patient, but I specialize in several techniques, including cervical spine surgery, cervical spine replacement, lumbar spine surgery, laminoplasty, robotic surgery, and endoscopic spine surgery.
Minimally invasive spine surgery provides various benefits. It requires less anesthesia, causes less blood loss, and uses smaller incisions that heal quickly. It allows patients to return to their lives quicker and risks significantly fewer complications.
Don’t let back or neck problems keep you from living your best life. Take the first step toward pain relief today. Call the practice of William Sheppard, MD, to schedule a new-patient appointment, or book your visit online.
William Sheppard, MD, MPH
Orthopedic Surgeon
1131 Wilshire Blvd
Suite 100
Santa Monica, CA 90401
Murtaza Rizvi, MD
Orthopedic Surgeon
13213 Ventura Blv
Studio City, CA 91604
