Axiom Clinical Research



Susan J. Steen, M.D.


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.

Stephen M. Sergay, MB BCh (M.D.)


Graduating in 1970 from University of Witwatersrand Medical School in Johannesburg, South Africa, Dr. Sergay went on to complete his residency through Harvard University in Boston, Massachusetts from 1973 through 1976, at Peter Bent Brigham, Beth Israel, and Children’s Hospitals and then worked at the Lahey Clinic in Boston. He became Board Certified in Neurology in 1977. In 1980, Dr. Sergay and his family moved to Tampa, FL. where he developed Tampa Neurology Associates. In 1993, he was one of the principal founders of Axiom Clinical Research of Florida, conducting clinical trials for major pharmaceutical companies such as Merck, Novartis, Parke-Davis, and other well-known sponsors. Dr. Sergay is the Past President of the American Academy of Neurology and a past trustee of The World Federation of Neurology. He is a founding chair to the United Council on Neurologic Specialities. He is on staff at Memorial Hospital of Tampa.

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.


Dr. Reddy graduated from Gandhi Medical College in Hyderabad, AP, India, in 1998, as well as receiving his ECFMG Certification that same year. He completed his Neurology residency and Clinical Neurophysiology Fellowship at Allegheny General Hospital, Pittsburgh, Pennsylvania in 2004 and 2005. 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.