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St. Catherine of Siena Medical Center is located on 76 acres on the north shore of Long Island in Smithtown, New York. Our campus is comprised of a 536-bed, not-for-profit hospital (including 240 nursing home beds), and a 60,000 square foot medical office building. On February 29, 2000, Catholic Health Services of Long Island, (CHS), purchased St. John’s Episcopal Hospital from Episcopal Health Services. The Center was renamed St. Catherine of Siena Medical Center after Catherine Benincasa of Siena of Italy, who was noted for her work as a nurse, mediator and spiritual leader during the 14th century.

St. Catherine of Siena Medical Center is the owner and operator of St. Catherine of Siena Hospital and St. Catherine of Siena Nursing Home, which are located on a single campus in Smithtown, New York. CHS and the CHS hospitals are the foundation of an integrated delivery system organized to serve Nassau and Suffolk counties under the auspices of the Roman Catholic Diocese of Rockville Centre. In addition to the CHS hospitals, the CHS integrated delivery system includes a number of related organizations representing a full continuum of care throughout Nassau and Suffolk counties. With and through the CHS hospitals, CHS has formed affiliations with Winthrop-South Nassau University Health System, Inc. and the Long Island Health Network.