Bangkok Dusit Medical Services is Thailand's largest private healthcare group. It was founded by the Thai billionaire Prasert Prasarttong-Osoth.
There are six hospitals with 34 hospital branches in the group: The seventeen branches of Bangkok Hospital, the BNH Hospital, the five branches of Phyathai Hospitals, the five Paolo Memorial Hospitals, the five branches of Samitivej Hospital and the Royal Bangkok Hospital.
The company is listed on the Thai stock exchange, and is looking to expand to other countries.Wikipedia