From Longman Dictionary of Contemporary Englishinternistin‧tern‧ist /ˈɪntɜːnɪst $ -ɜːr-/ noun [countable] American English MNa doctor who has a general knowledge about all illnesses and medical conditions of organs inside your body, and who treats illnesses that do not need operations
Examples from the Corpus
internist• The relationship of the internist, the surgeon, and the anesthesiologist is one example.Origin internist (1900-2000) internal (medicine) + -ist 