top of page


Susan J Steen, M.D.

steen1_176 (2).jpg


Dr. Steen graduated from the University of Florida Medical School in 1978, served her residency in University of South Florida and affiliated hospitals and completed her Neurology residency at the University of Florida, Gainesville, receiving Board Certification in Medicine & Surgery in 1979 and in Neurology and Psychiatry in 1991. She joined Tampa Neurology Associates in 1983, becoming a partner shortly thereafter, and is a co-founder (1993) and president of Axiom Clinical Research of Florida Dr. Steen is a renowned speaker for Alzheimer’s Disease, and is the medical advisor to multiple memory loss facilities. She is on staff at St. Joseph’s, Memorial Hospital of Tampa, St. Joseph’s Women’s Hospital and Tampa General.

Mark C. Cascione, M.D.



Dr. Cascione received his Doctorate in Medicine in 1991 from University of Vermont College of Medicine. After completing residencies at Maine Medical Center, Portland, Maine (1992) and Duke University Medical Center, Durham, North Carolina (1995), he received his Board Certification in Neurology & Psychiatry in 1997 and in Electrodiagnostic Medicine in 1998. Dr. Cascione joined Tampa Neurology Associates and Axiom Clinical Research of Florida in 1996, subsequently becoming a partner in both companies. He is on staff at St. Joseph’s, Memorial Hospital of Tampa, St. Joseph’s Women’s Hospital and Tampa General. Dr. Cascione is a national and international thought-leader and educator for treatment and research topics in Multiple Sclerosis.

Sunil S. Reddy, M.D.

steen1_176 (2).jpg


Dr. Reddy graduated from Gandhi Medical College in Hyderabad, AP, India, in 1998. He completed Neurology residency and Clinical Neurophysiology Fellowship at Allegheny General Hospital, Pittsburgh, Pennsylvania in 2004 and 2005 respectively. Dr. Reddy received his Diplomate, American Board of Psychiatry & Neurology certification in 2005 and his Diplomate, American Academy of Electrodiagnostic Medicine certification in 2006. He joined our staff at Axiom Clinical Research of Florida in August, 2006 after working as a neurologist in Pennsylvania and North Dakota. Dr. Reddy is well-versed in ICH/GCP procedures and in all aspects of clinical research practice.

Linga V. Reddy, M.D., Ph.D. 

L. Reddy Photo.jpg


Dr. Linga Reddy received his M.D. training from All India Institute of Medical Services, New Delhi, India and received his Ph.D. in Neuroscience from the University of Southern California, Los Angeles. he completed his residency training in Neurology at the Medical College of Wisconsin, Milwaukee and subsequently served as Assistant Professor (Neurology) at Medical College of Wisconsin. He also completed his Fellowship in Neuromuscular Medicine from Washington University, St. Louis. 

He is a Diplomat of the American Board of Psychiatry and Neurology in Neurology as well as Neuromuscular Medicine. He is also a Diplomat of the United Council of Neurologic Subspecialties in Clinical Neuromuscular Pathology and a Diplomat of the American Board of Electrodiagnostic Medicine. Dr. Reddy has published in leading peer reviewed journals and he is a member of the American Neurological Association. He has received Faculty Teaching Awards from residents in 2011-2012 as well as from medical students in 2009 - 2010. He also received a special recognition award in 2013 given by residents in Neurology for Excellence in Leadership, Mentoring, and Teaching. Dr. Reddy is married and has one daughter.

bottom of page