Mount Sinai Morningside

Mount Sinai Morningside, formerly known as Mount Sinai St. Luke's, is a teaching hospital located in the Morningside Heights neighborhood of Manhattan in New York City. It is affiliated with the Icahn School of Medicine at Mount Sinai and the Mount Sinai Health System, a nonprofit hospital system formed by the merger of Continuum Health Partners and the Mount Sinai Medical Center in September 2013. It provides general medical and surgical facilities, ambulatory care, and a Level II Trauma Center, verified by the American College of Surgeons. From 1978 to 2020, it was affiliated with Mount Sinai West as part of St. Luke's–Roosevelt Hospital Center.

Mount Sinai Morningside is the primary provider of health care serving the neighborhoods of the Upper West Side and western Harlem. As of 2025, Dr. Tracy Breen, MD, FACP, is the interim president and Chief Medical Officer.

The structure was erected in 1896 as St. Luke's Hospital, and was designed by Ernest Flagg. Several additions were built in the early 20th century, and some of the original pavilions have been demolished. Parts of the facility have been designated as an official New York City landmark, and the remaining pavilions of the original hospital are listed on the National Register of Historic Places.