However, the government of General Phibunsongkhram then separated the Faculty of Medicine (Siriraj Medical School), Departments of Dentistry, Pharmacy, and Veterinary Science from Chulalongkorn University and re-organized them into the University of Medical Sciences (). The university was officially founded on February 2, 1943, and new schools and departments have been established since then. In 1959, the Medical Science Preparatory School (now Faculty of Science) was moved to Phaya Thai area, thus beginning the Phaya Thai campus. During the 1960s the university focused its development on the Phaya Thai campus. In 1965, another medical school was established – the Faculty of Medicine of Ramathibodi Hospital at Phaya Thai. The first medical school outside Bangkok was also set up as Faculty of Medicine Nakorn Chiang Mai Hospital in Chiang Mai Province, until 1964 when it was transferred to Chiang Mai University. Before being transferred In 1968, the university established pharmacy and dentistry schools at a new campus apart from those received from Chulalongkorn University. On February 21, 1969, King Bhumibol Adulyadej declared the name of the university to be changed to Mahidol University () in honor of his father Prince Mahidol of Songkla. The university bought a large suburban area known as Salaya in 1971 for its future developments. In the following years, the former faculties of Dentistry and Pharmacy were returned to Chulalongkorn University.