Dr. Matthew (. Gnirke

Erik Dorf is an Orthopedics provider in Frisco, Colorado. Dr. Dorf is rated as an Advanced provider by MediFind in the treatment of Tennis Elbow. His top areas of expertise are Dupuytren Contracture, Scaphoid Non-Union, Rhizarthrosis, and Carpal Tunnel Syndrome. Dr. Dorf is currently accepting new patients.

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 Tennis Elbow. His top areas of expertise are Tendinitis, Bursitis, Tennis Elbow, and Plantar Fasciitis.

Born in Denver but raised in New York, Dr. Madureira has come full circle to join us here at Orthopedic Centers of Colorado. She is a Physical Medicine & Rehabilitation (PM&R) trained Sports Medicine Physician with a passion for getting and keeping people active and working with individuals across the age and fitness spectrum. She was drawn to Sports Medicine by the ability to combine a broad range of treatments including exercise prescription, diagnostic and therapeutic musculoskeletal ultrasound, and regenerative medicine. She is an active member of the American Medical Society for Sports Medicine & the American Academy of Physical Medicine and Rehabilitation. Prior to working at Orthopedic Centers of Colorado, Dr. Madureira obtained a Bachelor of Science at Tulane University in New Orleans, a Master of Public Health from Columbia University in New York and attended medical school at the New York Institute of Technology College of Osteopathic Medicine. She completed her residency in PM&R at Montefiore Medical Center in New York where she served as chief resident in her final year. Subsequently she completed a fellowship in Sports Medicine at Burke Rehabilitation Hospital – assisting with sideline & training room coverage from the high school to professional levels. She has earned several accolades including resident of the year as well as the Leo M. Davidoff Society award for Outstanding Achievement in the Teaching of Medical Students. Dr. Madureira is rated as an Experienced provider by MediFind in the treatment of Tennis Elbow. Her top areas of expertise are Tendinitis, Bursitis, Tennis Elbow, and Baker Cyst.