Dr. Francis J. O'Neill is a cardiologist in East Meadow, New York and is affiliated with multiple hospitals in the area, including Nassau University Medical Center and Huntington Hospital at Northwell Health. He received his medical degree from American University of the Caribbean School of Medicine and has been in practice between 11-20 years. Dr. Francis J. O'Neill has expertise in treating coronary artery disease, heart failure, hypertension & high blood pressure, among other conditions - see all areas of expertise. Dr. Francis J. O'Neill accepts Medicare, Aetna, Cigna, Blue Cross - see other insurance plans accepted. Dr. Francis J. O'Neill is highly recommended by patients.