Meet our Doctors

John R. Cassidy, M.D.

Dr. Cassidy received his Bachelor's Degree from Yale University in 1980 and graduated from the Medical College of Virginia in 1984, where he was elected the Alpha Omega Alpha Honor Society. He completed six years of neurosurgical residency at Johns Hopkins, including a fellowship in Orthopedic Spine Surgery and training at the National Neurosurgical Center in Dublin, Ireland. Dr. Cassidy has published numerous scientific papers covering such topics as spinal cord tumors, intraoperative spinal monitoring, spinal trauma, and spinal fusions. He has been selected by American Association of Neurological Surgeons to teach advanced spinal reconstructive techniques at their continuing medical education courses and has taught at the Mayo Clinic, Washington University, University of New Mexico and the University of Florida at Gainesville.

Christopher Guerin, M.D.

Dr. Guerin received his Bachelor's Degree from the University of Southwestern Louisiana in 1982, and graduated from the Johns Hopkins University School of Medicine in 1986, where he was elected to the Alpha Omega Alpha and Phi Beta Kappa Honor Societies. He completed seven years of neurosurgical residency at Johns Hopkins, including a fellowship in Neurosurgical Oncology. He then served four years at the National Naval Medical Center, with a joint appointment at the National Institutes of Health. He then returned to the faculty at Johns Hopkins Hospital where he was Assistant Professor of Neurosurgery until establishing his current practice in Sarasota and Venice.


Dr. Guerin has authored many specific papers on brain tumors and has given invited lectures at national and international neurosurgery meetings. Clinically, he maintains an active general neurosurgery practice with special interest in tumors, vascular disease and complex spinal diseases.

Notice of Privacy Practices


You may reach our office from 8:30 a.m. - 5:00 p.m., Monday - Friday Phone: (941) 484-3404.



Contact Us Today!

Neurosurgical Associates

Cassidy & Guerin M.D. P.A.,
842 Sunset Lake Blvd
Suite 302
Venice, FL  34292

Phone: 941-484-3404 941-484-3404


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