Sydney Adventist Hospital, commonly known as the San, is a large private hospital in Sydney, Australia, located on Fox Valley Road in Wahroonga. Established on 1 January 1903, as a not-for-profit organisation, it was originally named the Sydney Sanitarium from which its colloquial name was derived. The hospital is operated by the Seventh-day Adventist Church, whose Australian headquarters are located in the immediate vicinity of the San.