The emergency departments at ChristianaCare's Christiana Hospital, Wilmington Hospital, Union Hospital, and the free-standing emergency department in Middletown, Delaware treat a combined total of more than 225,000 patients each year, making our doctors, nurses and support staff among the most experienced emergency medical professionals in the region. ChristianaCare's Emergency Department is ranked 24th in the United States and 15th on the East Coast in number of patient visits, according to data from the American Hospital Association.