 After divesting or closing all legacy Allegheny Health Education and Research Foundation hospitals, Tenet entered into a definitive agreement to sell its remaining Philadelphia assets — Hahnemann and St. Christopher's — to American Academic Health System, a newly-formed affiliate of Paladin Healthcare.The definitive agreement was announced in September 2017, with the sale finalized in January 2018.Hahnemann University Hospital announced that it was closing on June 26, 2019 and diverted trauma patients from its emergency room on June 30, 2019.