Fourth stage: B.E. 2528-2542
BE 2528 The first professional nursing and midwifery practice Act was declared, Thailand Nursing Council was established.
B.E. 2532 Faculty of nursing, Siriraj and Ramathibodi, Mahidol university, Chiangmai, Khonkaen, established PhD degree in Nursing (initiated by Assoc.Prof. Dr. Tassana Boonthong)