Thailand achieved full population coverage of financial protection for health care in 2002 with successful implementation of the Universal Coverage Scheme (UCS). The three public health insurance schemes covered 98.5% of the population by 2015. Current evidence shows a high level of service coverage and financial risk protection and low level of unmet healthcare need, but the path toward UHC was not straightforward. Applying the Political Economy of UHC Reform Framework and the concept of path dependency, this study reviews how these factors ...