Lack of information prior to medical tourism visits is a significant issue in meeting the expectations of patients. A global portal with doctor rating systems plausibly can bridge this gap. Doctor rating com-parisons can help to reduce the information asymmetry in medical tourism. This study proposes a set of standards for doctor rating criteria for a medical tourism portal. A model has been developed to investigate the interaction effect of doctor rating systems with trust in an intermediary and information quality on willingness to travel abroad for treatment. Hypotheses were then empirically evaluated us-ing an experiment. Implications and contributions of the study are discussed.