General internal medicine units in academic medical centers: their emergence and functions.

By 1979, 77% of medical school primary teaching hospitals had functioning general internal medicine units; less than 5% had existed before 1970. These units were established to meet institutional needs for primary care internal medicine teachers and clinicians. By the end of the decade they had achieved major administrative and staffing responsibility for a wide variety of general education and service activities. The scope of general internal medicine units goes beyond the narrow definition of primary care internal medicine, to include activities traditionally considered those of the entire department of medicine.