Board of Directors

Executive Committee/Officers

Matthew Smuck, MD



Matthew Smuck, MD


Dr. Matthew Smuck is the Chief of PM&R and Associate Professor of Orthopaedic Surgery at Stanford University. He is the Medical Director of Rehabilitation Services for Stanford Healthcare where he specializes in the comprehensive conservative management of spine disorders. He has served as Deputy Editor of The Spine Journal, and Co-Editor of the Orthopedics Knowledge Update in Spine, 4th edition. Dr. Smuck is an award-winning researcher and pioneer in the new field of physical performance monitoring. He directs the Wearable Health Lab at Stanford, investigating medical applications of mobile technology to improve musculoskeletal and neurologic disease detection, treatment and prevention. He regularly lectures on his research in the U.S. and abroad. His work has received numerous research society awards and publication awards, including the American Academy of PM&R’s 2014 President’s Citation Award, the PM&R Journal and Foundation for PM&R’s 2015 Best Original Research Award, the 2016 ISSLS Prize, and The Spine Journal’s Outstanding Paper Award in 2013, 2016, and 2017.

David J. Kennedy, MD



David J. "D.J." Kennedy, MD

Vice President

Dr. Kennedy is a Professor and Chair of Physical Medicine and Rehabilitation at Vanderbilt University Medical Center where his practice focuses on non-operative and interventional spine. He completed his residency in Physical Medicine and Rehabilitation at the University of Washington in Seattle where he served as Chief Resident, and then a Spine and Sports Fellowship at the Rehabilitation Institute of Chicago. He has published over 75 peer-reviewed journal articles, over 50 published abstracts, and over 20 book chapters. He has given over 90 lectures at national meetings, over 50 lectures at international meetings, and numerous local presentations and invited grand rounds. He is a Deputy Editor for The Spine Journal, and on the editorial board for Pain Medicine. He is on the Board of Directors for the Spine Intervention Society where he serves as Vice President. He is also on the Board of Directors for the American Academy of Physical Medicine & Rehabilitation (AAPM&R). Within SIS, he previously sat on the Research Division, was the Chair of the Standards Division, and has served as Treasurer and Secretary. He also chaired the SIS Annual Meeting Program Committee for several years.
Timothy Maus, MD

Timothy Maus, MD

Past President

Dr. Maus graduated from Mayo Medical School in 1981, completed a Diagnostic Radiology residency at Mayo Graduate School of Medicine in 1985, and subsequently joined the Mayo Clinic Department of Radiology. He completed a Neuroradiology Fellowship at Mayo in 1996, and is currently Professor of Radiology, Mayo Clinic School of Medicine. Dr. Maus founded a section within Radiology to provide image-guided pain management procedures in 1999, working closely with Anesthesiology, PM&R, Neurology and Surgical colleagues in the Mayo multidisciplinary Spine Center. He has been a Mayo Teacher of the Year in Radiology, the recipient of the Mayo Individual Award for Excellence, and the Carmen Award for Excellence in Clinical Practice in the Department of Radiology. 
Dr. Maus has authored numerous book chapters and peer-reviewed articles on spine imaging and interventions.  He is a co-investigator in an NIH funded research laboratory at Mayo examining novel analgesic strategies.  He speaks regularly nationally, and internationally. He has served as the Chair of the SIS Education Division, Treasurer, and President of the Society from 2018-19.

Josh Rittenberg, MD


Joshua Rittenberg, MD


Dr. Rittenberg is Chief of the Physical Medicine and Rehabilitation Department at Kaiser Permanente in Oakland, CA, where he is also co-Chair of Chiefs of PM&R for Northern California. He is board certified in Physical Medicine and Rehabilitation and in Pain Medicine.  Dr. Rittenberg attended medical school at New York Medical College and completed his internship at St. Vincent’s Hospital in Manhattan. He received his residency training in Physical Medicine and Rehabilitation at the University of Washington in Seattle. He completed a fellowship in Interventional Spine at the Florida Spine Institute. He spent 10 years on faculty at the Rehabilitation Institute of Chicago, where he was an Associate Professor in the Department of Physical Medicine and Rehabilitation at Northwestern University Feinberg School of Medicine. He has published original research, review articles, and book chapters in the areas of interventional and rehabilitative spine care.  He is an SIS Senior Faculty member and has instructed, lectured, and been a course director at numerous of the society's Bio-Skills Workshops. He is the current Secretary, and previously served as Treasurer and Chair of the Society's Education Division and Chair of the Annual Meeting Program Planning Committee.

Scott Horn, DO


Scott Horn, DO


Dr. Horn is an interventional spine and musculoskeletal physiatrist at a private practice in Virginia Beach, Virginia. He earned his Doctorate in Osteopathic Medicine from Des Moines University School of Osteopathic Medicine and completed his residency in Physical Medicine and Rehabilitation at the University of North Carolina Hospital in Chapel Hill. After completing his fellowship training in Interventional Spine Medicine in Winston-Salem, North Carolina, he began his service on the Spine Intervention Society's Socioeconomic Committee (now Health Policy Division) and Coding Subcommittee as well as the NASS Coding Committee. He volunteers as faculty for spinal injection and coding courses and holds an appointment as The Spine Intervention Society's Advisor to the American Medical Association's CPT Editorial Panel. He has previously served on the SIS Board of Directors as Chair of the Health Policy Division, and was the chair of the 2018 Annual Meeting Committee.

Margaret Klys, MJ, CAE

Margaret Klys, MJ, CAE


Margaret Klys has a bachelor’s degree in Health Information Management from the University of Illinois at Chicago and a Master of Jurisprudence (MJ) in Health Law degree from Loyola University Chicago School of Law.

Ms. Klys is a Certified Association Executive (CAE) and has extensive experience in executive association management. She joined the Spine Intervention Society as the Director of Health Policy in 2010 and was named CEO in 2015. Her previous association experience includes the American Society of Neuroradiology (ASNR) and the American Osteopathic Association. She has spent 20 years working in the healthcare industry and over 15 years working for and advocating on behalf of the physician community.

Board Members

Alison Stout, DO

Alison Stout, DO

Education Division Chair

Dr. Stout is Fellowship Director at Evergreen Sport and Spine Center in Kirkland, Washington where she practices full-time and engages in clinical research. Prior, she was Director of Musculoskeletal and Spine Care for VA Puget Sound and faculty for the PM&R department at the University of Washington in Seattle, Washington. She earned her medical degree from Kirksville College of Osteopathic Medicine before completing a preliminary year with Johns Hopkins in Baltimore, Maryland. Following her PM&R residency at University of Washington, she completed a musculoskeletal medicine and interventional spine fellowship in Bellevue, Washington. Dr. Stout is board certified in Physical Medicine and Rehabilitation and Sports Medicine. She specializes in comprehensive non-operative spine and musculoskeletal care, including fluoroscopically and ultrasound guided interventions. For SIS, she has served on the Education Division, the Annual Meeting Program Planning Committee, the Patient Safety Task Force and the Standards Division. Other organizational involvement includes the North American Spine Society (Chair of Rehabilitation, Interventional & Medical Spine Section).

D. Scott Kreiner, MD

Health Policy Division Chair

Dr. Kreiner is a board-certified physiatrist since 2000. He attended college at the University of Arizona, where he completed his bachelor of science degree in mechanical engineering in the program of biomechanical engineering. Following his undergraduate studies, Dr. Kreiner stayed in Tucson and enrolled in medical school at the University of Arizona College of Medicine. His internship was spent at Tucson Medical Center. Then he moved to Dallas, where he completed his residency in physical medicine and rehabilitation at the University of Texas at Southwestern. In July of 1999, he returned to Arizona as an associate, and later a partner, at Ahwatukee Sports & Spine. In 2018, Ahwatukee Sports & Spine merged with Barrow Brain and Spine to form a large multidisciplinary (neurosurgery, physical medicine and rehabilitation) group, with Dr. Kreiner becoming the Director of Interventional Spine & Sports Medicine.

Dr. Kreiner's clinical practice focuses on evidence-based, outpatient musculoskeletal medicine, with the majority being spine-related. He performs the spectrum of interventional spine procedures. He also utilizes musculoskeletal ultrasound for diagnosis and guided injections in the extremities.

Dr. Kreiner enjoys teaching other physicians as well. He is the fellowship director at Ahwatukee Sports & Spine and has taught a number of courses on interventional spine procedures in the United States and abroad. He is a member of the Spine Intervention Society Standards Committee and serves on multiple committees for the North American Spine Society (NASS). He serves on the NASS Board of Directors as the Clinical Research Development Chair, co-chairs the Coverage Committee, and is currently in his second term as the co-chair of the Evidence-Based Guidelines Committee. To date, he has authored a number of evidence-based guidelines on spine conditions, including degenerative lumbar stenosis, cervical radiculopathy, degenerative lumbar spondylolisthesis, and lumbar disc herniation.

John MacVicar, MB, ChB  

John MacVicar, MB ChB

International Division Chair

Dr. MacVicar was born and raised in the Scottish Highlands and educated at the University of Glasgow Medical School. He has lived and worked in Christchurch, New Zealand, since 1980. He is vocationally registered with the Medical Council of New Zealand in musculoskeletal medicine and is the medical director of a multidisciplinary rehabilitation clinic. His main clinical interest is the evidence-based use of interventional techniques for the investigation and treatment of spinal pain, and he was trained in the application of these techniques through the Department of Clinical Research at the University of Newcastle, Australia. He has been a member of the Spine Intervention Society member since 2004 and served as President from 2016-17.


David Levi, MD

Research Division Chair

Dr. David Levi received his undergraduate degree from Tulane University in New Orleans and earned his Doctorate of Medicine from Eastern Virginia Medical School. He completed his residency in Physical Medicine and Rehabilitation at Carolinas Rehabilitation in Charlotte, North Carolina where he served as Chief Resident. Following residency, he completed his fellowship in spine and musculoskeletal medicine in New Orleans at LSU with Dr. Charles Aprill. In 2003, he joined APM Spine and Sports Physicians and currently practices in Virginia Beach and Norfolk, Virginia. Dr. Levi is board certified by the American Board of Physical Medicine and Rehabilitation. He is an active member of several organizations including the American Academy of Physical Medicine & Rehabilitation, Spine Intervention Society, North American Spine Society, American Institute of Ultrasound Medicine, and World Academy of Pain Medicine Ultrasonography.  He has lectured extensively on back and neck disorders as well as spine injection procedures.

Dr. Levi is an active researcher and published author in the fields of fluoroscopically guided spinal injections, ultrasound guided peripheral joint injections, and novel techniques in regenerative medicine.  He serves as an editorial reviewer for The Spine Journal, Pain Medicine, and PM&R journals.  Dr. Levi is a SIS bio-skills lab instructor and is the current Research Division Chair. In addition, he serves as an instructor and lecturer for the North American Spine Society injection courses.

Other areas of clinical interest and expertise include the use of neuro-musculoskeletal ultrasound.  He is skilled in using ultrasound to diagnose upper and lower extremity disorders as well as in the performance of ultrasound guided injections.  Dr. Levi earned facility accreditation for musculoskeletal ultrasound from the American Institute of Ultrasound Medicine.  Dr. Levi has been awarded the honor of “Top Docs” in Hampton Roads, Virginia.                                   


Milan P. Stojanovic, MD

Standards Division Chair

Dr. Stojanovic was the principal founder of the interventional pain program at Massachusetts General Hospital, Harvard Medical School where he served as its director for 12 years. He currently serves as Vice Chair of the Spine Intervention Society’s Standards Division and also as a Spine Section Co-Editor for Pain Medicine. Dr. Stojanovic served as Chief, Pain Medicine, Anesthesiology, Critical Care and Pain Medicine Service, VA Boston Healthcare System, Harvard Medical School where he is currently teaching. He had the unique experience of training and mentoring many respected leaders in the field of interventional pain for the last 24 years.

Dr. Stojanovic sits on the editorial board of several medical journals and is credited with more than 60 publications. He is Chair, Educational Committee for the World Institute of Pain and is an examiner for the Fellow in Interventional Pain Practice Examination. He served as a Director at Large for the American Society of Interventional Pain Physicians. Dr. Stojanovic was a co-founder and co-owner of the Spine and Pain Institute of New England. He did his post-doctoral residency training in internal medicine, pediatrics, and anesthesiology, and completed two pain management fellowships. Dr. Stojanovic has a very unique experience, combining many years of both academic and private practice of interventional pain medicine. He has dedicated his career to improving technical expertise and excellence in interventional procedures, outcome measurement, teaching, and clinical research.

Zack McCormick, MD  

Zachary L. McCormick, MD

Fundraising Committee Chair

Dr. McCormick is an Assistant Professor and Director of Clinical Spine Research at the University of Utah Orthopaedic Center. Board certified Physiatry and Pain Medicine, his practice focuses on both conservative and interventional care of spine pain and related conditions. He eared his medical degree at the University of Pennsylvania School of Medicine and completed residency and fellowship training at Northwestern University/ The Rehabilitation Institute of Chicago. Dr. McCormick serves as the chair of the SIS fundraising committee and as a member of the Standards Division, Education Division, and the Patient Safety Committee. He has published over 65 peer-reviewed journal articles and lectures nationally on his research, which focuses on the safety and effectiveness of spine and pain interventions. He has received research awards from various Pain Medicine and PM&R medical societies, the Howard Hughes Medical Institute, and the National Institute of Diabetes Digestive & Kidney Diseases (NIH).

Yakov Vorobeychik, MD, PhD

Yakov Vorobeychik, MD, PhD


Dr. Vorobeychik is Professor of Anesthesiology and Neurology and the Director of Interventional Pain Management at Hershey Medical Center (HMC) and Penn State College of Medicine. He attended medical school in Russia and worked as a neurologist in Moscow for ten years. During that time his special interest was the treatment of neuropathic pain. Upon coming to the United States, Dr. Vorobeychik completed his neurology residency at Hahnemann University in Philadelphia and subsequently worked there as a faculty member of its Neurology department. Later on, he enrolled in the pain fellowship training program at Massachusetts General Hospital’s Anesthesia department. Having graduated from this program, he accepted a position at HMC Anesthesia department, where he was appointed the Director of Interventional Pain Management. Dr. Vorobeychik is certified by the American Board of Psychiatry and Neurology with sub-specialization in Pain Medicine. He is an author of original research articles and book chapters. He is actively involved in teaching fellows, residents, and medical students at HMC. Dr. Vorobeychik previously served as the Chair of the Spine Intervention Society Standards Division.
Charles Aprill, MD

Charles N. Aprill, MD

Founding Member

Dr. Aprill graduated from LSU Medical School in June 1967, completed his internship at Charity Hospital of Louisiana in 1968, and a radiology residency at Ochsner Medical Foundation in 1971. He was certified in “Radiology” in 1972. After serving in the United States Naval Active Reserves, Dr. Aprill went into private practice of radiation oncology with nuclear medicine and oncologic interventional diagnostic and therapeutic special procedures with Dr. Vincent Collins in Houston.

Dr. Aprill practiced general radiology with emphasis on interventional special procedures for the next decade. In 1986 he opened a solo practice limited to diagnosis and conservative treatment of adult spine disorders. In May 1993 Dr. Aprill established Magnolia Clinic, a solo private interventional pain practice where he remained until Hurricane Katrina closed the doors in September 2005. His current practice, Interventional Spine Specialists, opened in Kenner, Louisiana in January 2006 and continues to this day.

Dr. Aprill is a founding member of the Spine Intervention Society and was recognized in 2003 with an SIS award for outstanding service and dedication as a teacher. He achieved the position of Clinical Professor of Radiology and Physical Medicine/Rehabilitation at Louisiana State University Health Science Center. Dr. Aprill has dedicated time to proctoring physicians in spine interventional procedures through fellowship programs at the University and with SIS education as an instructor since 1990. Clinical work in the private practice has generated about a dozen papers in peer-reviewed journals. Dr. Aprill has authored or co-authored about two-dozen more papers and about a dozen chapters on spine related issues.

Nikolai Bogduk, MD, PhD  

Nikolai Bogduk, MD, PhD

Founding Member

In 2014, Professor Bogduk retired as Professor of Pain Medicine at the University of Newcastle and Director of Clinical Research at the Newcastle Bone and Joint Institute. He spent 43 years teaching Anatomy and Pain Medicine, and researching the anatomical basis, validity, and effectiveness of techniques for the diagnosis and treatment of spine pain and headache. He remains active in the Standards Division of SIS and serves as the SIS Section Editor for Pain Medicine. Otherwise, he maintains a private conservation park west of Sydney, Australia.

Richard Derby, MD

Richard Derby, MD

Founding Member

Dr. Derby is the Medical Director of Spinal Diagnostics and Treatment Center and CEO of Comprehensive Spine Diagnostics Medical Group in Daly City, CA. He is a Board-Certified Anesthesiologist. Dr. Derby received his undergraduate degree from Stanford University and his Medical Degree from the University of California at Irvine. He completed his residency at the University of California San Francisco.

Dr. Derby is currently on the Executive Board as Past President and Founding Member of the Spine Intervention Society. He is an active member of several professional societies including the American Society of Anesthesiologists, North American Spine Society, International Intradiscal Therapy Society and the World Institute of Pain. He holds journal, editorial, and review committee memberships for several professional publications including Pain Medicine, The Spine Journal, Spine, The Clinical Journal of Pain, Pain Practice, and Pain Digest. Awards received include: Lifetime Achievement Award (2011), Best Doctor in America (2007-2008), Friend of ASIPP Award (2007), and Sofamor-Danek Posterior Award (1998).

Further, Dr. Derby has given more than 250 invited lectures, presentations, and workshops and is a prolific author with over 130 publications including 20 invited book chapters.

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