Dr. John E. Tobey

Dr. Efren Caballes joined Cornerstone Orthopedics & Sports Medicine, a division of OCC, in 2016. He takes a comprehensive approach to musculoskeletal care, incorporating exercise, physical modalities, bracing, injections, and regenerative medicine. He has a special interest in diagnostic and therapeutic musculoskeletal ultrasound and focuses on aligning treatment with each patient’s recovery needs and goals. Dr. Caballes earned a Bachelor of Science in Molecular Cellular Biology from the University of Illinois at Urbana-Champaign and a medical degree from Touro College of Osteopathic Medicine in New York City. He completed his residency in Physical Medicine and Rehabilitation at NYU Medical Center, where he served as Chief Resident, followed by a Sports Medicine Fellowship at NYU. His training included working with endurance athletes at the NYU Running Performance Lab and artists at the Juilliard School and Harkness Center for Dance Injuries. While in New York, he developed a passion for running, joining the Prospect Park Track Club and volunteering with Back on My Feet. In Colorado, he continues to care for runners and triathletes at all levels, from recreational to Olympic athletes. He is a Level 1 certified USA Track and Field coach and was selected to serve as a volunteer physician for the U.S. Olympic & Paralympic Committee in 2020. He also teaches sports ultrasound nationally and serves as a clinical instructor for multiple medical programs. Dr. Caballes is rated as an Advanced provider by MediFind in the treatment of Bursitis. His top areas of expertise are Tendinitis, Bursitis, Tennis Elbow, and Plantar Fasciitis.

Matthew Gnirke is a Physiatrist and a Sports Medicine provider in Frisco, Colorado. Dr. Gnirke is rated as an Advanced provider by MediFind in the treatment of Bursitis. His top areas of expertise are Spinal Stenosis, Invertebral Disc Disease, Cervical Spondylosis, and Tendinitis. Dr. Gnirke is currently accepting new patients.

As an Interventional Physiatrist, Dr. Christopher D‘Ambrosia treats a wide range of problems, including sore shoulders, spinal cord injuries, arthritis, tendonitis, back pain, as well as work- and sports-related injuries. His focus is on restoring function for his patients. Dr. D’Ambrosia has been in private practice in Colorado since 2005. He has provided his services for the NHL – Colorado Avalanche, NBA – Denver Nuggets, and the Colorado Crush Arena Football Team. Dr. D'ambrosia is rated as an Advanced provider by MediFind in the treatment of Bursitis. His top areas of expertise are Bursitis, Sacroiliac Joint Disease, Tendinitis, and Pudendal Neuralgia.