Andrew Zelby, MD, FAANS

Andrew S. Zelby

Dr. Zelby is a board-certified neurosurgeon who has been performing neurosurgery for the past 26 years. He completed a neurosurgery residency at Loyola University Medical Center, followed by an orthopedic spine fellowship at Rush University Medical Center. After completing his residency and spine fellowship, Dr. Zelby was an assistant professor in the Departments of Neurosurgery and Orthopedic Surgery at Loyola. Since leaving Loyola in 1996, he has had an active practice in the western suburbs of Chicago. He is also an assistant professor of neurosurgery at Rush University Medical Center. Dr. Zelby has privileges at MacNeal Hospital, Gottlieb Memorial Hospital, LaGrange Memorial Hospital, Elmhurst Memorial Hospital and Rush University Medical Center. He is a member of the American Association of Neurological Surgeons and the Congress of Neurosurgeons, and is a fellow of the American Association of Neurological Surgeons. He is diplomate of the American Board of Neurological Surgeons.

Dr. Zelby focuses a significant part of his practice on spine care. He works with his patients so that each patient is an active participant in the health and treatment of their spine. By learning about their condition and the various treatment options, Dr. Zelby and his patients work together to find the best methods to help keep their spine healthy in the long term. Dr. Zelby and his team strive to find and recommend non-surgical conservative methods to help our patients heal whenever that is the best choice for their spine problem.

When surgery is necessary, Dr. Zelby offers his patients the most advanced, state-of-the-art surgical techniques, as well as more than 25 years of experience. This includes the use of minimally invasive surgical procedures, with disc surgeries and fusion surgeries using minimally invasive approaches when possible. Dr. Zelby also has a special interest in pituitary tumors. This includes the surgical treatment for these tumors and the long term monitoring of the condition. He also collaborates with a team of physicians to manage the endocrine and hormonal issues of pituitary tumors, and confers with ophthalmologists for regular eye exams to monitor the visual issues associated with pituitary tumors.



Francisco Espinosa, MD, PhD, FACS, FRCS(C), FAANS

Francisco J. Espinosa

Dr. Espinosa is a board certified neurosurgeon in USA and Canada with more than 30 years of academic and clinical experience in general neurosurgery. After completing his doctorate degree and neurosurgical residency at the University of Alberta in Edmonton, Alberta, Canada, he practiced Academic Neurosurgery as a full time faculty member in the role of Associate Professor of Surgery at Queen’s University in Kingston ON, Canada for eleven years prior to joining Neurological Surgery and Spine Surgery.

Dr. Espinosa’s clinical interests are vast and span a multitude of diagnoses from brain to spine and peripheral nerves. Such interests particularly emphasize non-operative and operative treatment of spine disorders from the cervical region to the lumbo-sacral junction using the most advanced minimally invasive methods. He also has a clinical interest in helping patients with chronic pain via spinal cord stimulator placement or pain pump implantation once they have exhausted all other surgical and nonsurgical methods.

Dr. Espinosa has privileges at MacNeal Hospital, Gottlieb Memorial Hospital, LaGrange Memorial Hospital and Elmhurst Memorial Hospital.

Dr. Espinosa also connects with the Spanish speaking patients on a personal level given his native Spanish tongue.

Dr. Espinosa is a member of both the American Association of Neurological Surgeons and the Congress of Neurological Surgeons. He is also a fellow of the American College of Surgeons, the American Association of Neurological Surgeons and the prestigious Royal College of Physicians and Surgeons of Canada.



Sean Salehi, MD, FAANS

Sean A. Salehi

Dr. Salehi is a board certified neurosurgeon who completed his neurosurgical residency at Northwestern University in Chicago in 2002. He also completed a spine fellowship program under the teachings of the renowned neurosurgeon Steven Ondra while at Northwestern. Dr. Salehi remained a faculty member at Northwestern University for three years before joining Neurological Surgery and Spine Surgery. He was one of the early adopters of the minimally invasive techniques in spine surgery employing small incisions to performing the most complicated spine surgeries, hence reducing postop pain and shortening the rehabilitative period. This has given him a 10 year experience in such operations as of 2013.

Dr. Salehi has also more than ten years of experience in treating patients with benign and malignant brain tumors using operative techniques or via stereotactic radiation techniques such as Gamma Knife or Cyber Knife.

He has also authored many peer-reviewed medical articles in neurosurgery and is the author of several book chapters in neurosurgical texts. Additionally, he is the designer of three neurosurgical instruments and holds three provisional patents.

Dr. Salehi also serves as the team neurosurgeon for Chicago Rush arena football team since 2009.

Dr. Salehi is a member of both the American Association of Neurological Surgeons and the Congress of Neurosurgeons. He is also a fellow of the American Association of Neurological Surgeons.

Dr. Salehi has privileges at MacNeal Hospital, Gottlieb Memorial Hospital, LaGrange Memorial Hospital, Elmhurst Memorial Hospital, St Anthony Hospital, Metrosouth Hospital and Center for Minimally Invasive Surgery.



Tibor Boco, M.D., F.A.A.N.S.

Tibor Boco, M.D., F.A.A.N.S.

Dr. Boco is a diplomate of the American Board of Neurological Surgeons and assistant professor of neurological surgery at Rush University Medical Center. After attending medical school at the University of Chicago, he completed his neurosurgery residency at Rush University Medical Center. He then spent several years at San Juan Regional Medical Center, in New Mexico, where he eventually assumed the role of director of spine services with an emphasis on minimally invasive spine surgery.

After joining Neurological Surgery and Spine Surgery, S.C., Dr. Boco has developed an active practice focusing on spine care, including, degenerative disease of the neck and lower back as well as cancer of the spine or spinal cord. He has extensive experience utilizing minimally invasive techniques, when appropriate, to treat the most complex spine conditions.

Dr. Boco is also interested in tumors of the brain and he uses image-guided operative techniques and stereotactic surgery in form of the Cyber Knife or the Gamma Knife.
He has authored several peer-reviewed medical articles in neurosurgery and orthopedic surgery and he is author of several book chapters focusing on neurosurgical care. He is a member of the American Association of Neurological Surgeons, the Congress of Neurological Surgeons, and the European Association of Neurosurgical Societies.

Dr. Boco has privileges at Rush University Medical Center, Elmhurst Memorial Hospital, MacNeal Hospital, LaGrange and Hinsdale Memorial Hospitals, Bolingbrook Hospital, Gottlieb Memorial Hospital, and Aiden Center for Day Surgery.

Dr. Boco sees many foreign language-speaking patients. He is fluent in German, Spanish, Czech and French.



Kimberly J. Mercurio, MD

Kimberly J. Mercurio

Dr. Mercurio is a board certified physiatrist. Her practice in Physical Medicine and Rehabilitation focuses on returning patients to their previous level of function and optimizing their physical well-being. She performs electrodiagnostic studies in the office, diagnosing nerve and muscle problems such as carpal tunnel syndrome, pinched nerves and peripheral neuropathies. Other interests of hers include osteoporosis, spasticity treatment after stroke or spinal cord injury, fibromyalgia, concussion and amputee care. She sees patients for sports related conditions such as tennis elbow, tendinitis, and plantar fasciitis. Another aspect of her practice includes treating patients for low back and neck pain non-operatively with referral to her neurosurgical colleagues for consultation if surgery is indicated. She works in concert with physical and occupational therapists to optimize her patients’ functional ability and decrease pain.

Dr. Mercurio attended the University of Notre Dame and earned a Bachelor of Science in Pre-Professional Studies. She received her medical degree from Tulane University School of Medicine and was elected to the Alpha Omega Alpha Honor Medical Society. Dr. Mercurio completed an internship in General Surgery at the University of Florida in Jacksonville. She graduated from the University of Chicago/Schwab Rehabilitation Hospital Physical Medicine and Rehabilitation Residency Program in 2012 where she served as co-chief resident. Professional societies that Dr. Mercurio is a member of include the American Academy of Physical Medicine and Rehabilitation, the American Academy of Neuromuscular and Electrodiagnostic Medicine, The American Society of Neuromonitoring, the American College of Sports Medicine and the Dooley Society, an organization of the medical alumni of the University of Notre Dame. She enjoys spending her free time with her husband and children and as well as running, playing platform tennis, and traveling.

Dr. Mercurio has privileges at MacNeal Hospital, LaGrange Memorial Hospital, Hinsdale Hospital, Elmhurst Memorial Hospital, Gottlieb Memorial Hospital, Saint Anthony Hospital, and the Center for Minimally Invasive Surgery.



JOHN K. SONG, MD, FAANS, FACS

John K. Song

Dr. John Song is a Board-Certified and Fellowship-trained Neurosurgeon who has been practicing in Chicago for many years. He obtained a degree in mechanical engineering from the University of Texas at Austin but decided that medicine was a better fit for him due to his interest in interacting with and caring for people. He completed his neurosurgery residency at Vanderbilt University and subsequently completed a Fellowship in Minimally Invasive Spine Surgery at the University of Chicago.

Dr. Song became faculty at Northwestern Memorial Hospital as an assistant professor in the Department of Neurosurgery before leaving to become head of neurosurgery at Illinois Masonic Medical Center. He is a member of both the American Association of Neurological Surgeons and the Congress of Neurosurgeons, the North American Spine Society, the Joint Section of Spine Surgery, and is a Fellow of the American College of Surgeons. He is now privileged at a number of hospitals including:

MacNeal Hospital
Gottlieb Memorial Hospital
Adventist LaGrange Memorial Hospital
Adventist Bolingbrook Hospital
Adventist Hinsdale Hospital
Elmhurst Memorial Hospital
Northwestern Memorial Hospital
The Center for Minimally Invasive Surgery

Dr. Song has authored many peer-reviewed scientific papers and co-authored several book chapters in neurosurgical texts. He has also participated in training other surgeons in minimally-invasive spinal surgery techniques. In addition, with his background in mechanical engineering, he has been on an implant design team for DePuy Johnson & Johnson, invented several devices for use in surgery and has founded several medically-based companies.

Dr. Song practices general neurosurgery but focuses mainly on treating disorders of the spine. Such disorders include herniated discs, radiculopathy, myelopathy, spondylolisthesis, stenosis and spinal fractures. He takes time to listen to his patient’s problems and will try to devise a comprehensive team-based approach to help his patients recover and work with them to keep them healthy. When surgery is required, Dr. Song uses state-of-the-art minimally invasive techniques to minimize the length of surgery and to speed recovery – in many cases these surgeries can be performed in an outpatient setting.

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