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Ari Greis


Dr. Ari Greis is a board-certified physician who specializes in the non-operative treatment of spinal and musculoskeletal disorders. He is the director of the Medical Cannabis Department at Rothman Orthopaedic Institute and is a Senior Fellow in the Institute of Emerging Health Professions and the Lambert Center for the Study of Medicinal Cannabis and Hemp. He is interested in the treatment of chronic pain with cannabis as an alternative to opioids.


Dr. Greis is a Clinical Assistant Professor of Rehabilitation Medicine at Thomas Jefferson University who has published numerous research articles, textbook chapters, and continues to teach and lecture to residents and medical students.  Dr. Greis served as the chief resident at the University of Washington in Seattle and is fellowship trained in sports and spine rehabilitation.  He performs fluoroscopic guided spine injections, ultrasound guided peripheral joint injections, trigger point injections, and electrodiagnostic testing.