Ethnic minority patients are less participative in medical consultations compared to ethnic majority patients. It is thus important to find effective strategies to enhance ethnic minority patients' participation and improve subsequent health outcomes. This study therefore aimed to investigate the relation between the match between patients' preferred and perceived participation and doctor-patient concordance in preferred doctor-patient relationship on patient satisfaction, fulfillment of information needs, and understanding of information among Turkish-Dutch and Dutch patients. Pre- and postconsultation questionnaires were filled out by 136 Dutch and 100 Turkish-Dutch patients in the waiting rooms of 32 general practitioners (GPs). GPs completed a questionnaire too. Results showed that a match between patients' preferred and perceived participation was related to higher patient satisfaction, more fulfillment of information needs, and more understanding of information than a mismatch for both patient groups. For doctor-patient concordance a conditional main effect on all outcome measures emerged only among Turkish-Dutch patients. That is, for patients who were discordant with their GP, higher perceived participation was related to lower satisfaction, worse fulfillment of information needs, and worse understanding of the information. In order to improve medical communication GPs should thus primarily be trained to tailor their communication styles to match patients' preferences for participation.