The first Christian missionaries arriving in Thailand in 19th century often combined preaching with medical help for local population.

Initially, clinics were set up which gradually developed into better equipped hospitals.

After renovation, the buildings were officially inaugurated as the Bangkok Christian Hospital in 1949.

A new Outpatient Department of the Hospital was opened in 1957 with dentistry, laboratory, and pharmacy facilities along with a chapel.

In the 1970s, an office building in honour of the "Church of Christ in Thailand", was constructed on Surawong Road, and the 13-storey "Mo Bradley Building", named after the pioneer missionary and doctor Dr. Dan Beach Bradley in Thailand, was completed in 1981.