Background: To stimulate quality through choice of provider, patients need to seek and base their decisions on both relevant and reliable information describing providers’ clinical quality. The purpose of this study was first to investigate what types of information and information sources patients turned to in the active choice of primary care provider. Second, it investigated whether a sub-group of patients considered more likely to actively seek information, also sought more advanced information about the clinical quality of providers. Methods: Data collection was performed through a web-based survey to the general adult (18+) Swedish population, for a net sample of 3 150 respondents. Descriptive statistics were used to study what types of information and information sources respondents used prior to their choice. Multiple regression analysis was employed to examine predictors for seeking relevant and reliable information describing providers’ clinical quality.Results: Patients in active choice situations searched mainly for basic information, for instance, how to switch providers and their geographical location, and used a median of one information source. Information sources used were mainly dependent sources, such as providers themselves, and family and acquaintances. The sub-group of individuals more likely to seek information were not found to seek more advanced forms of information. Conclusions: Not even the patients considered most likely to seek information prior to their choice of primary care provider, searched for information deemed necessary to make well-informed choices. Thus, patients did not act according to the theoretical assumptions underlying the patient choice reforms, i.e., making informed choices based on clinical quality in order to promote the best providers over inferior ones. The results call for governments and health care authorities to actively assess and develop providers’ clinical quality by means other than patient choice.