High Quality Content by WIKIPEDIA articles! Medical centers in the United States are conglomerations of health-care facilities including hospitals and research facilities that also either include or are closely affiliated with a medical school. Although the term medical center is sometimes used to refer to any concentration of health-care providers including local clinics and individual hospital buildings the term is more properly used to refer to larger facilities or groupings of facilities that include a full spectrum of health services, medical education and medical research.