It was incorporated on September 6, 1921. It was initially named Glen Cove Community Hospital and operated out of a three-story brick Colonial mansion on Glen Street, which was remodeled to provide accommodations for twenty patients. It outgrew these facilities, so its current campus on St. Andrew's Lane was purchased and a new building constructed. The building, to be named North Country Community Hospital, was three stories with space for 112 beds, with a separate nurses' home and service building. Its architect was
Peabody, Wilson & Brown. A total of 5,000 people donated towards the effort. At the
cornerstone-laying ceremony in 1926, a significant number of its doctors resigned to protest wealthy donors on the new hospital's board handpicking its medical board. A new wing, increasing capacity to 150, opened in 1951. In 1956, construction began on a south wing to increase capacity from 180 to 250. In 1955, the name was changed to Community Hospital at Glen Cove. The hospital had sued the new
North Shore Hospital in nearby
Manhasset, New York, over its name, contending that they were too similar, leading to errors in the delivery of medicines and other supplies, mail, and the writing of
checks. Upon losing, it decided to change its own name to prevent confusion. In 1971, a new four-story north wing opened, containing a new lobby and emergency room, and facilities for rehabilitation medicine, intensive care, pediatrics, radiology, social services, and admissions. A further expansion occurred in the 1980s. == Later history ==