The authors conducted a field experiment in which emergency-room patients of a metropolitan hospital were either given or not given an expected waiting time to see a physician. Patients were then surveyed through the mail on their satisfaction and perceptions of service quality. The results revealed that satisfaction levels were higher when patients believed that they had received information on expected waiting time. Regression analysis revealed that service quality dimensions of trust, responsiveness, and staff service were significant predictors of patient satisfaction. In addition, satisfaction was independently influenced by whether patients' prior timeliness expectations were confirmed. The authors discuss the results in terms of the concept that the situational context of the service may influence the quality dimensions that most affect consumer satisfaction.