Meet our doctors at St. John Neurosurgery

Tyler Auschwitz, MD, is a fellowship-trained, board-certified neurosurgeon and provides brain and spine surgery to adult patients.

Dr. Auschwitz has a special interest in disorders of the spine, as well as cerebrovascular diseases, movement disorders, peripheral nerve disorders, brain and spinal tumors.

Dr. Auschwitz specializes in minimally invasive procedures for brain tumors, aneurysms, AVMs, and carotid disease, and has advanced training in cerebrovascular and endovascular neurosurgery. He also performs complex cervical and lumbar spinal surgeries, including decompressions and fusions, and trauma neurosurgery.

Mohammad Yashar Kalani, MD, is a board-certified, experienced neurosurgeon at Ascension Medical Group St. John Neurosurgery in Tulsa, Oklahoma. Dr. Kalani uses minimally invasive procedures to repair spine injuries, arthritic spinal conditions and remove spine and brain tumors. He uses robotic-assisted surgery as part of our spine surgery and brain tumor program. Robotic-assisted surgery may lead to a faster recovery, shorter hospital stay, and less scarring. Schedule a consultation to learn more.

He starts by listening to better understand your concerns. Dr. Kalani then works with you to create a surgical care plan that supports your brain, spine and nerve health. From your first consultation to surgery and occupational and physical therapy, we'll connect you to specialists to support your recovery. Dr. Kalani also specializes in performing non-surgical and minimally invasive surgical procedures to treat herniated discs, spinal stenosis, brain tumors, bleeding on the brain, spinal osteoarthritis, traumatic nerve injuries, and more. He also specializes in brain and spine surgery to remove benign and cancerous tumors.

Thomas F. Rapacki, MD, is a board-certified, experienced neurosurgeon at Ascension St. John in Tulsa, Oklahoma. Dr. Rapacki has over twenty five years experience treating brain tumors, spinal tumors, degenerative disorders of the spine, spinal cord stimulation, brain and spine trauma and disorders of peripheral nerves.

Dr. Rapacki received his medical degree from the Uniformed Services University and completed his neurosurgery residency at Walter Reed Army Medical Center. He has been with Ascension St. John since 2005.

Gannon F. Gill, PA, is a physician assistant specializing in neurosurgery at Ascension St. John in Tulsa, Oklahoma. He listens to understand you and your health concerns, taking the time to get to know you and your family's health history and create a personalized care plan that's right for you. As a physician assistant, Gannon can diagnose illness and injury, prescribe medication and provide non-surgical care.