Barrett Boody, M.D.


Barrett Boody, M.D. is a fellowship trained, board certified orthopedic spine surgeon. He attended medical school at the University of  Chicago Pritzker School of Medicine and completed an orthopaedic surgical residency at Northwestern Memorial Hospital in Chicago, IL, followed by a spine surgery fellowship at the Rothman Institute at Thomas Jefferson University Hospital in Philadelphia, PA. Dr. Boody provides comprehensive surgical care of the spine including: primary and revision surgery of the cervical, thoracic and lumbar spine, sports injuries, traumatic injuries of the spine & neck, back pain, and scoliosis.

In addition to his clinical practice, Dr. Boody stays actively involved with research and medical education. He volunteers as an Assistant Professor of Clinical Orthopedic Surgery at Indiana University, educating residents and fellows on spine pathology and spine surgery. Dr. Boody has authored over 55 peer reviewed publications and book chapters, served as a textbook section editor and has presented research at national symposiums. Currently, Dr. Boody is a co-investigator for multiple FDA trials conducted at the Indiana Spine Group. He is a member of the editorial board for the Clinical Spine Surgery journal and is a manuscript reviewer for multiple peer-reviewed spine journals.


Mario Brkaric, M.D.


Dr. Mario Brkaric is a board-certified orthopedic surgeon, who specializes in spine. Dr. Brkaric graduated medical school and completed his residency at the State University of New York Health Sciences, Center Downstate Medical Center of Brooklyn. He went on to complete his fellowship in orthopedic surgery of the spine at William Beaumont Hospital. In 2010, Dr. Brkaric was inducted as a Fellow of the American Academy of Orthopaedic Surgeons (AAOS). With both national and international recognition, Dr. Brkaric is the author of numerous articles published in peer-reviewed medical journals.

Since 2006, Dr. Brkaric has been serving individuals and their loved ones from Lafayette, Rensselaer, and Logansport. Dr. Brkaric offers several surgical and non-surgical approaches for the treatment of the musculoskeletal system, including bones, joints, ligaments, tendons, muscles and nerves. His areas of expertise include spinal deformity, degenerative conditions, spinal trauma, minimally invasive technology, and dynamic and motion preserving technology.



John Chambers, M.D.


Dr. John Chambers is a board-certified, fellowship trained Orthopedic Spine Surgeon who specializes in multiple aspects of adult and pediatric spine surgery for conditions such as scoliosis, trauma, disc herniations, spinal stenosis and degenerative conditions.  He has been providing both operative and non-operative spine care for the residents of southern Indiana for over 20 years.

Dr. Chambers began his post-graduate studies by earning a degree in Chemistry at Eastern Kentucky University where he graduated with honors.  He received his medical degree from the University of Louisville and was elected to the Alpha Omega Honor Society for academic achievement. He completed an internship in general surgery and his residency in orthopedic surgery at the Medical College of Georgia.  While in Georgia, he served as a certified ring physician for United States Amateur Boxing as well as a ringside physician for the Ultimate Fighting Championship. He advanced his training by completing a fellowship in spine surgery at the Leatherman Spine Center/Spine Institute for Special Surgery offering him the opportunity to work and train with several world-renowned leaders in spine health and surgery.  His research and writing of orthopedic and spine topics has resulted in publications and presentations at major meetings.

Dr. Chambers remains an avid sports enthusiast and athlete having completed dozens of Ironman triathlons.

John Gorup, M.D.


John Gorup, M.D. has been providing highly advanced and specialized surgical spine care to Lafayette, Indiana and the surrounding communities since 1997.

Dr. Gorup attended Tulane University School of Medicine in New Orleans, Louisiana, and completed his residency at the State University of New York Health Sciences, Center Downstate Medical Center of Brooklyn. He was North Central Indiana’s first fellowship trained, board-certified orthopaedic spine surgeon, and is a member of the American Academy of Orthopaedic Surgeons (AAOS).

Dr. Gorup’s professional dedication, highly technical skills, and extensive clinical training has earned him many accolades, including international recognition for his work and numerous articles published in peer-reviewed journals. In addition, Dr. Gorup sits on the teaching faculty and product development teams for some of the world’s largest spinal implant manufacturers.

Dr. Gorup performs minimally invasive spinal procedures, including microdiscectomy, cervical fusion, and SI joint fusion. His areas of expertise include degenerative conditions and deformities of the cervical and lumbar spines.

Jeffrey Konopka, M.D.


Jeffrey A. Konopka, M.D. is a fellowship trained orthopaedic spine surgeon.  He is a native Hoosier and grew up in Greenwood, IN.  He completed his bachelor’s degree in chemical engineering at Purdue University and medical school from Indiana University School of Medicine.  He completed his orthopaedic surgery residency at Emory University in Atlanta, GA.   He then received his advanced spine training from the prestigious Harvard Spine Fellowship at Massachusetts General Hospital and Brigham Women’s Hospital in Boston, MA.

Jeff is very excited to be returning home to the state of Indiana joining the Indiana Spine Group to provide top notch spine care for patients with the entire spectrum of spine conditions including degenerative, deformity, trauma and oncologic conditions.  He has special interests in performing minimally invasive procedures, navigation and robotic assisted spine surgery, as well as, training residents and fellows.  He is also very interested in developing new techniques and technologies using his engineering background as he did at Eli Lilly developing drug delivery devices.  Dr. Konopka has co-authored several publications, book chapters, and presented at both national and international spine conferences.

Jeff is an avid golfer, enjoys playing hockey, competing in triathlons, and cheering for Purdue athletics.  He enjoys spending time with his wife, who is also a physician in Indianapolis, and their dog Belle.

Paul Kraemer, M.D.


Paul E. Kraemer, M.D., is a native of Iowa.  He was educated at Cornell University in New York, The University of Iowa Medical School, and the University of Wisconsin Hospitals and Clinics Orthopaedic Surgery residency program.  He then spent an additional year at Seattle’s Harborview Medical Center/ the University of Washington in a combined orthopaedic and neurosurgical Spine Surgery fellowship.

Dr. Kraemer has a special interest in scoliosis, revision surgery, and minimally invasive techniques.  “My training at both Wisconsin and Harborview emphasized logical careful thinking about some of the most difficult problems affecting the Spine.  The more complex the problem, the more important it is to precisely identify the source of the pain, and design a solution, operative or non-operative, that makes sense.” He practices at Community Hospital, Riverview Hospital, and Indiana University Hospitals, where he serves as assistant professor of Orthopaedic Surgery fellowship director for the spine surgery fellowship, and actively involved in research, resident education, and cross-specialty education of practicing physicians.  He has presented research and taught courses nationally at the American Academy of Orthopaedic Surgeons, the American Association of Neurological Surgeons, and the North American Spine Society, as well as speaking locally on complex spine and diagnostic challenges to the IU departments of medicine, orthopaedics, and neurosurgery.

Dr. Kraemer and his family live in Carmel, where he enjoys time with his wife, daughter and son, and is an avid golfer and outdoors enthusiast.


Michael McCarthy, M.D.


Michael H. McCarthy M.D., M.P.H. is a fellowship trained, orthopedic spine surgeon. He was born and raised in Little Rock, AR and was recruited to play collegiate football at Boston College. He attended medical school at the University of Arkansas for Medical Sciences on an academic scholarship and was inducted into the Delta Omega Society graduating with honors. He completed his general surgery internship and orthopaedic surgery residency at Northwestern Memorial Hospital in Chicago, IL. He was elected by his faculty to serve as Chief Resident of the Department of Orthopaedic Surgery and was given the Outstanding Teaching Award and the Brian Hartigan Memorial Award for his compassionate care, clinical excellence and dedication to resident and medical student education.

Dr. McCarthy completed fellowship training in spinal surgery at the Hospital for Special Surgery in New York, NY with several world-renowned spine surgeons. He has received extensive training in both Orthopaedic and Neurosurgical spine surgery techniques during his residency and fellowship and continues to combine them in his degenerative, minimally invasive and deformity practice.

Dr. McCarthy is passionate about patient centered care and evidence-based treatments through continued learning and research providing the best possible clinical solutions to his patients. While he believes that world class spine care begins with non-operative treatments, he strives to provide personalized surgical plans optimizing outcomes and maximizing his patients’ ability to return to the things they love. His patient centered focus is predicated on tailored treatment plans and a collaborative approach providing a patient first experience.

Dr. McCarthy volunteers as an Assistant Professor of Clinical Orthopedic Surgery at Indiana University, educating residents and fellows on spine pathology and spine surgery and has authored numerous research publications, textbook chapters, as well as presented nationally and internationally on his research. He was nominated into the Emerging Leadership Forum of the American Orthopaedic Association (AOA) and served as a delegate in the American Academy of Orthopaedic Surgeons’ Resident Assembly Committee. He is a current member of the North American Spine Society (NASS), American Medical Association (AMA), and American Academy of Orthopaedic Surgeons (AAOS).

Dr. McCarthy’s training has taken him across the country and he is honored to bring this world-class experience to serve the folks of Indiana. He is proud to continue the legacy of ISG as a center of excellence and thought leader in spinal surgery. Both he and his wife’s families live in Indiana and they are excited to raise their two (soon to be three) children as Hoosiers! Dr. McCarthy enjoys spending time with his family, fishing and being outdoors.

Justin Miller, M.D.


Justin W. Miller, M.D. is a highly skilled, board-certified, fellowship trained orthopaedic spine surgeon. Dr. Miller’s fellowship consisted of 18 months of training with world-renowned spine surgeons Rick Sasso, M.D., Thomas Zdeblick, M.D., Paul Anderson, M.D., and Cliff Tribus, M.D.

Dr. Miller specializes in spinal disorders, such as: disc herniations, arthritic/degenerative processes, spinal stenosis, complex pediatric and adult kyphotic and scoliotic deformities, sports-related injuries, spondylolisthesis, myelopathy, infections, trauma, oncology, and revision surgeries. He has interests in minimally invasive spine surgery and cutting-edge spinal stealth navigation techniques, and has undergone extensive training in his field due to the complexity of spinal and neurologic disorders with a goal of providing the highest level of care to his patients.

Dr. Miller is co-investigator on a number of current studies with the Indiana Spine Group. Research interests include degenerative disc disease, infection prevention, lumbar stenosis, and osteoporosis, to mention a few.


Zachary NaPier, M.D.


Zachary NaPier, M.D. is a board-certified, fellowship trained orthopedic spine surgeon.  He received a bachelor’s degree in mathematics from Dartmouth College before attending medical school at George Washington University in Washington, D.C.  He completed orthopedic surgery residency at Cedars Sinai Medical Center in Los Angeles, CA, one of the country’s top orthopedic and neurosurgical spine centers.  Dr. NaPier underwent advanced spine training at the Harvard Spine Fellowship at Massachusetts General Hospital and Brigham and Women’s Hospital in Boston, MA.  Dr. NaPier built a successful community practice in Northern California prior to joining Indiana Spine Group.

Dr. NaPier has extensive training and experience with cutting edge minimally invasive and motion preserving surgical techniques that create less postoperative pain, decreased soft tissue injury and blood loss, and faster recovery times. He is also skilled in complex reconstruction of spinal deformities, degenerative conditions, and failed back syndrome. His practice involves comprehensive clinical and surgical care of adult and adolescent patients.

Dr. NaPier has a specific expertise in prone transpsoas lateral interbody fusion (PTP LIF) and has presented and published his techniques in addition to teaching other surgeons. He is also a prolific researcher, having authored or co-authored many clinical and basic science manuscripts, presentations, and textbook chapters in addition to receiving grants from organizations including the Cervical Spine Research Society and Scoliosis Research Society.

“My goal is to evaluate your condition, relieve your pain, and restore your function using the most effective, minimally invasive techniques available,” said Dr. NaPier. “I will help you to understand your back or neck symptoms and treatment options so that you can make informed decisions regarding your treatment.”

“I am honored by the trust you place in me and my recommendations for your care will be the same that I would make for a member of my own family.”

Dr. NaPier is an avid golfer and enjoys spending time with his wife, who is also a physician in Indianapolis, and their son.  Indiana Spine Group is privileged to welcome Dr. NaPier’s world class experience to serve the residents of Indiana.

Thomas Reilly, M.D.

Thomas Reilly, M.D. specializes in the comprehensive care and spine surgery of patients with spinal and nerve disorders of the neck and back. Dr. Reilly lectures both nationally and internationally, speaking on multiple spine surgery related topics, and has authored / co-authored many articles related to spine surgery.