The Rockefeller University is a private biomedical research and graduate-only university in New York City, United States. It focuses primarily on the biological and medical sciences and provides doctoral and postdoctoral education. It is classified as a "Special Focus – Research Institution". Rockefeller is the oldest biomedical research institute in the United States. The university is located on the Upper East Side of Manhattan, between 63rd and 68th streets on York Avenue.