Dr. Karl Larsen is a board-certified, fellowship-trained orthopedic surgeon specializing in hand and upper extremity surgery. He holds the prestigious Certificate of Added Qualification in Surgery of the Hand and has been named a “Top Doc” by Colorado Springs Style magazine for eight consecutive years.He treats a wide range of conditions, including athletic injuries, overuse syndromes, elbow disorders, shoulder fractures, and complex hand trauma. Dr. Larsen earned his medical degree from the Uniformed Services University in Bethesda, Maryland, and completed his orthopedic residency at Wilford Hall Medical Center in San Antonio, Texas, followed by a fellowship in hand and microvascular surgery at the Indiana Hand Center.Dr. Larsen served in the U.S. Air Force and Air Force Reserve from 1989 to 2015, retiring as a Colonel. His military service included roles as a flight surgeon and orthopedic surgeon, leadership positions at the U.S. Air Force Academy, and deployments to Tibet and Iraq. His honors include the Air Force Special Operations Command Flight Surgeon of the Year and USAFA Clinical Surgeon of the Year, along with multiple military decorations. Dr. Larsen is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Carpal Tunnel Syndrome, Rhizarthrosis, Osteoarthritis, and Ganglion Cyst.

Dr. Ky Kobayashi is a board-certified orthopedic surgeon specializing in conditions affecting the hand and upper extremities. He has a Certificate of Added Qualification in Surgery of the Hand and Sports Medicine. Dr. Kobayashi specializes in hand, wrist, elbow, and shoulder surgery including microvascular surgery, arthroscopy, traumatic reconstruction, and joint replacement. Dr. Kobayashi is a distinguished graduate from the US Air Force Academy and the University of Colorado School of Medicine. He completed his orthopedic residency at the University of Connecticut as well as a fellowship in hand and upper extremity surgery at Tufts Combined Hand Fellowship in Boston, MA. Dr. Kobayashi retired from the United States Air Force in 2014 with many decorations after several deployments to combat zones. He has extensive experience in combat casualty care and reconstruction. He has been staff and assistant program director for the Wilford Hall Air Force Orthopedic Residency Program in San Antonio, TX. He is actively involved in research & education and is an Assistant Professor of Surgery at the Uniformed Services University of Health Sciences in Bethesda, MD. Dr. Kobayashi was elected to serve on the Board of Specialties for the American Academy of Orthopedic Surgeons as well as the Society of Military Orthopedic Surgeons for education.  He has been the team physician for the Air Force Academy sports programs and is currently a consultant for the Olympic Training Center. Dr. Kobayashi is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Carpal Tunnel Syndrome, Rhizarthrosis, Trigger Thumb, and Osteoarthritis.

Aaron Martin is a Physiatrist in Parker, Colorado. Dr. Martin is rated as a Distinguished provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Distal Median Nerve Dysfunction, Opisthotonos, Muscle Spasms, and Sacroiliac Joint Disease. Dr. Martin is currently accepting new patients.

Dr. Matthew Delarosa is an orthopedic surgeon who specializes in hand, wrist, and elbow surgery. He provides both surgical and nonsurgical treatment to improve function and reduce pain. He focuses on complex trauma and reconstruction of the upper extremity, wrist surgery and arthroscopy, elbow surgery, targeted muscle reinnervation, elective treatment of nerve compressions and hand arthritis, and injuries to soft tissues including nerves, tendons, and ligaments. Originally from Baton Rouge, LA, Dr. Delarosa completed medical school and orthopedic training at LSUHSC New Orleans. He then further specialized in Hand and Microsurgery at OrthoCarolina in Charlotte, NC under the direction of Dr. Glenn Gaston. In addition to the full spectrum of routine upper extremity problems, a significant portion of his fellowship training concentrated on brachial plexus and complex peripheral nerve injuries. Additionally, he traveled to Florianopolis, Brazil to study under Dr. Jayme Bertelli, an expert in peripheral nerve injuries, brachial plexus injuries, and tendon transfers. He is also interested in improving function of upper extremity amputees through targeted muscle reinnervation (TMR) and the use of a myoelectric prosthesis. Through his work in congenital, brachial plexus, and amputee specialty clinics he has gained a wealth of knowledge on the multidisciplinary approach to patient care. Dr. Delarosa is rated as an Experienced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Tennis Elbow, Rhizarthrosis, Brachial Plexopathy, Thoracic Outlet Syndrome, and Leg or Foot Amputation.

Lt Col Henderson brings over 30 years of distinguished service to the United States Air Force, with a career that spans roles as an enlisted pharmacy technician, cadet, fighter pilot, and orthopedic hand surgeon. After enlisting in 1989, he earned an appointment to the U.S. Air Force Academy, graduating in 1996. He went on to fly the F-15C as a mission commander based out of Kadena AB, Japan, and was awarded the Air Medal for over 100 hours of combat time patrolling the Northern No Fly Zone over Iraq during the events of September 11, 2001.Following his aviation career, Lt Col Henderson pursued medicine, earning his medical degree from the University of Texas Southwestern Medical School in 2006. He completed his orthopedic surgery residency at the Uniformed Health Education Consortium in San Antonio and a fellowship in Hand and Microvascular Surgery at the University of Texas Health Science Center. Since 2012, he has served at the U.S. Air Force Academy, where he has held leadership roles as Chief of Hand Surgery, Chief of Orthopedic Surgery, and Chief of Surgery for the 10th Medical Group. He has also been a dedicated team physician for Academy athletes. Lt Col Henderson’s career is a testament to his deep commitment to service, excellence, and care—hallmarks of both his military and medical professions. Dr. Henderson is rated as an Experienced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Rhizarthrosis, Radial Nerve Dysfunction, Carpal Tunnel Syndrome, Osteoarthritis, and Bone Graft.

Originally from Minnesota, Dr. David M. Bierbrauer joined Cornerstone Orthopedics and Sports Medicine, a division of OCC, in 2011. He is a board-certified orthopedic surgeon, whose primary interest is in hand and elbow surgery, as well as a secondary interest in trauma care and sports medicine. Dr. Bierbrauer is an active member of the American Academy of Orthopedic Surgery, American Society for Surgery of the Hand, Western Orthopedic Association, and Colorado State Medical Society. Prior to working at Cornerstone Orthopedics, Dr. Bierbrauer graduated Cum Laude with a Bachelor of Arts Degree in Biology and Chemistry from St. Olaf College in Northfield, MN. He attended The Chicago Medical School at Rosalind Franklin University, where he was a Dean’s Award recipient. After medical school, Dr. Bierbrauer completed his residency at the University of Illinois at Chicago Hospital and his fellowship in Hand and Microvascular Surgery at the Christine M. Kleinert Institute in Louisville, KY. In 2011, he worked at Front Range Orthopedics in Colorado Springs from 2005-2011. As the official US Ski Team Physician, he has had the opportunity to travel internationally to France and Canada. Dr. Bierbrauer is rated as an Experienced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Rhizarthrosis, Tennis Elbow, Ganglion Cyst, and Trigger Thumb.

Originally from Seattle, WA, Dr. MacTaggart joined OCC-Cornerstone Orthopedics and Sports Medicine in 2019 after completing advanced training in hand and upper extremity surgery. She specializes in the full range of hand, wrist, and elbow conditions and offers the latest treatments, including fracture care, microvascular surgery, nerve decompression, repair or reconstruction, fusions and replacements, bracing, injections, and arthroscopy. Dr. MacTaggart is an active member of the American Academy of Orthopedic Surgery, the American Society for Surgery of the Hand, and the American Academy of Hand Surgery. Prior to working at OCC-Cornerstone, Dr. MacTaggart graduated summa cum laude with a Bachelor of Science degree in biology from Pacific Lutheran University in Tacoma, WA, where she also played on the women’s soccer team. She attended medical school at The University of Washington, graduating magna cum laude and was nominated to the Alpha Omega Alpha medical honors society. After medical school, Dr. MacTaggart completed her residency training at the University of Washington in Seattle, WA. Following residency, she completed a fellowship in hand and upper extremity surgery at The Philadelphia Hand to Shoulder Center/Thomas Jefferson University in Philadelphia, PA. Dr. Mactaggart is rated as an Experienced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. Her top areas of expertise are Tennis Elbow, Rhizarthrosis, Ganglion Cyst, and Carpal Tunnel Syndrome.

Dr. Gregg Martyak is a fellowship trained orthopedic surgeon, board certified by the American Board of Orthopedic Surgery (ABOS).  He has a Certificate of Added Qualification in Surgery of the Hand. He specializes in the treatment of injuries to the hand and upper extremity of both adult and pediatric patients, including microvascular surgery, complex nerve injuries, traumatic reconstruction, arthroscopy and joint replacement. Dr. Gregg Martyak is a distinguished graduate of the University of Virginia and Georgetown University. He received his medical degree from Jefferson Medical College and completed his orthopedic surgery residency at the Rothman Institute/Thomas Jefferson University in Philadelphia, PA. He followed this with a fellowship in hand and microvascular surgery at the Philadelphia Hand Center. Dr. Martyak served in the United States Air Force from 2008- 2012 achieving the rank of Lieutenant Colonel. He has extensive experience with combat casualty care with multiple deployments in Iraq and the Middle East. He was a clinical instructor for the combined US Air Force/ US Army combined orthopedic residency program at Brooke Army Medical Center, San Antonio, TX. He is an Assistant Professor of Surgery at the Uniformed Services University of Health Sciences in Bethesda, MD. Dr. Gregg Martyak was part of the team to perform the first hand transplantation at a military facility. Dr. Martyak has continued to care for military patients in Colorado Springs since 2012. Dr. Martyak is rated as an Experienced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Carpal Tunnel Syndrome, Rhizarthrosis, Ganglion Cyst, and Radial Nerve Dysfunction.

Dr. Choudhry provides a full complement of upper extremity/hand care from the shoulder to fingertips. A Colorado native, he graduated from Overland High School in Aurora where he was awarded the Bausch & Lomb Science Award for his “Excellent Promise in the Field of Science.” He went on to pursue a Bachelor of Science degree in molecular biology from the University of Denver and graduated Cum Laude. He then attended the University of Colorado Anschutz Medical School where he received the William Winter MD Award for his “Outstanding Performance in Orthopedic Surgery” as a senior medical student. He continued his passion for orthopedics by completing his residency at the University of Cincinnati and affiliated hospitals. As a graduating chief resident he was selected as the recipient of the Peter J. Stern MD award “in recognition for outstanding qualities in professionalism, patient care, and teaching.” He then decided to pursue subspecialty training and completed an Upper extremity/Hand fellowship at Wake Forest Baptist Medical Center in North Carolina. During fellowship he received the Fellow’s Clinical Science Silver Award by the Wake Forest Division of Surgical Sciences for his research on nerve injuries. Dr. Choudhry has several research endeavors that have been presented at national meetings and published in prestigous scientific journals. Dr. Choudhry is rated as an Experienced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Trigger Thumb, Ganglion Cyst, Rhizarthrosis, and Carpal Tunnel Syndrome.

Patrick Johnston is a Hand Surgeon and an Orthopedics provider in Steamboat Springs, Colorado. Dr. Johnston has been practicing medicine for over 16 years and is rated as an Experienced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Rhizarthrosis, Ganglion Cyst, Carpal Tunnel Syndrome, Vitrectomy, and Tissue Biopsy. Dr. Johnston is currently accepting new patients.

Lynn Sloan is a Physiatrist in Steamboat Springs, Colorado. Dr. Sloan is rated as an Experienced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Herniated Disk, Spinal Stenosis, Common Peroneal Nerve Dysfunction, and Foot Drop. Dr. Sloan is currently accepting new patients.

Simon Oh is a Neurologist in Aurora, Colorado. Dr. Oh is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Chronic Inflammatory Demyelinating Polyneuropathy, Distal Median Nerve Dysfunction, Peripheral Neuropathy, and Migraine.

Katharine Leppard is a Physiatrist in Colorado Springs, Colorado. Dr. Leppard is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. Her top areas of expertise are Distal Median Nerve Dysfunction, Invertebral Disc Disease, Spinal Stenosis, and Foot Drop.

Alexander Dietz is a Neurologist in Englewood, Colorado. Dr. Dietz is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Amyotrophic Lateral Sclerosis (ALS or Lou Gehrig's Disease), Spinal Muscular Atrophy (SMA), Spinal and Bulbar Muscular Atrophy, and Spinal Muscular Atrophy Type 3. Dr. Dietz is currently accepting new patients.

Karen Karwa is a Neurologist in Parker, Colorado. Dr. Karwa is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. Her top areas of expertise are Distal Median Nerve Dysfunction, Peripheral Neuropathy, Cramp-Fasciculation Syndrome, and Paraneoplastic Cerebellar Degeneration.

Katalin Pocsine is a Neurologist in Wheat Ridge, Colorado. Dr. Pocsine is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. Her top areas of expertise are Distal Median Nerve Dysfunction, Essential Tremor, Multiple Sclerosis (MS), and Relapsing Multiple Sclerosis (RMS).

Benjamin Marshall is a Physiatrist in Aurora, Colorado. Dr. Marshall is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Distal Median Nerve Dysfunction, Cervical Spondylosis, Foot Drop, and Invertebral Disc Disease. Dr. Marshall is currently accepting new patients.

Marshall Emig is a Physiatrist and a Sports Medicine provider in Aurora, Colorado. Dr. Emig is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Invertebral Disc Disease, Distal Median Nerve Dysfunction, Facet Joint Syndrome, and Spinal Stenosis. Dr. Emig is currently accepting new patients.

Bradley Gale is a Physiatrist in Boulder, Colorado. Dr. Gale is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. His top areas of expertise are Invertebral Disc Disease, Cervical Spondylosis, Distal Median Nerve Dysfunction, and Spinal Stenosis. Dr. Gale is currently accepting new patients.

Tiyonnoh Cash is a Neurologist in Greeley, Colorado. Dr. Cash is rated as an Advanced provider by MediFind in the treatment of Distal Median Nerve Dysfunction. Her top areas of expertise are Infantile Axonal Neuropathy, Congenital Insensitivity to Pain with Anhidrosis, Hereditary Sensory and Autonomic Neuropathy Type 2, and Distal Median Nerve Dysfunction. Dr. Cash is currently accepting new patients.