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About St. Catherine

Catholic Health Services of Long Island (CHS) was founded in 1997 to oversee the Diocese of Rockville Centre’s healthcare organization which now includes six hospitals, three nursing homes, a regional home care and hospice group and a community based agency for persons with special needs. More than 15,000 staff and 3,300 medical professionals work within the CHS system. 

On February 29, 2000 Catholic Health Services of Long Island (CHS) purchased the Medical Center then known as St. John’s Episcopal Hospital from Episcopal Health Services (EHS). The Center was renamed St. Catherine of Siena Medical Center after Catherine Benincasa of Siena, Italy who lived in the middle ages and was noted for her work as a nurse, mediator and spiritual leader.  Prior to that, St. John’s Episcopal Hospital was in operations since 1966. While not part of the Catholic Health Services of Long Island acquisition, St. John’s Episcopal Hospital also owned the Community Hospital of Western Suffolk (CHOWS) which was located on Route 347 in Hauppauge.  CHOWS opened as the Smithtown General Hospital in the early 1980s, was acquired by EHS in 1994, and closed in 1999. With no other hospitals in the vicinity, St. Catherine of Siena has strong market presence in the Smithtown area; primary competitors include Stony Brook University Hospital and Huntington Hospital. Secondary competitors include South Side Hospital.

St. Catherine’s is located on 110 acres on the north shore of Long Island in Smithtown. The campus is comprised of a 318-bed not-for-profit community hospital; a 240-bed nursing and rehabilitation care center; a 298-unit senior housing facility; and a 60,000 square foot medical office building. Our nurses, physicians and support staff are devoted to providing advanced health care in an environment of compassion to out patients, their families and out community.