Thai doctor and business magnate Prasert Prasarttong-Osoth, founder of Bangkok Dusit Medical Services (BDMS) and owner of Bangkok Airways, has died at the age of 93.
He passed away on 21 April 2026 after being treated for an extended period. His funeral will be held at Sala Klang Nam, Wat Thepsirin in Bangkok.
Born on 22 March 1933, Prasert was the chairman of Bangkok Airways and a key figure in Bangkok Dusit Medical Services, one of Thailand’s largest private healthcare groups. He also previously held senior executive roles across the group, which became a major force in Thailand’s private medical sector.
Prasert graduated in medicine from Siriraj Hospital under Mahidol University after completing earlier studies at Assumption College and preparatory programs at Chulalongkorn University. He began his career in surgery at Siriraj Hospital before expanding into business sectors including construction and oil exploration consultancy.
He later built a diversified business empire spanning aviation, healthcare, and related industries. In 2026, Forbes ranked him as Thailand’s seventh-richest person and 1,108th globally, with an estimated net worth of around US$3.9 billion.