Welcome to Brandywine Hundred Family Medicine. PATIENT PORTAL. LOG IN. A family-friendly medical practice located in Wilmington, Delaware. Learn more... Matthew M. O'Brien, M.D. 1401 Foulk Road, Suite 202 • Foulkstone Plaza, Wilmington, DE 19803. Phone: (302) 478-5650 • Fax: (302) 477-0455..