The evaluation of the quality of health care is considered by the World Health Organization (WHO) based on its defining factors: maximum performance of professional functions, optimal use of resources, least risk to the patient and high patient satisfaction from the interaction with the medical organization. In this regard, the need for clear, constant and positive communication of the medical subsystem with the population has increased to ensure satisfaction with accessible, coordinated, comprehensive and quality health care and to measure its correspondence between patients' preferences and their expectations. The choice of research method is still an important factor in evaluating the intra-organizational processes of medical organization management and, consequently, the effectiveness of the country's health care system. Purpose of the study: to conduct a comparative analysis of existing ways of studying patients' opinions and methodological techniques to confirm the validity and reliability of these designs. Materials and Methods. On the basis of literature data and regulated survey methods, the authors conduct a comparative analysis of different methodological techniques to measure patient satisfaction index using 6 questionnaires most widely used in international and Russian healthcare practice. Results of the study. The analysis of the methodological base of public health care on conducting a survey of the population receiving medical care at different stages of treatment and medical specialization allowed to show a wide list of applied questionnaires in the world and Russian systems of public health care and to reveal the mechanisms of achieving target indicators in different systems of evaluation scale. Conclusion. The issues of improving the methods of studying and assessing patient satisfaction with medical care and the quality of patient-physician interaction in scientific practice are not presented in a wide selection and using validation of informative Russian-language versions of international questionnaires for extended comprehensive assessment of indicators of change in the parameter of the controlled process.