Background. Today, the public does not want to be just a passive consumer of health services. Patients often expect to be informed and involved in decisions about their health. Objective. With better doctor–patient communication, patients are more likely to follow treatment recommendations. Material and methods. The study was conducted using a face-to-face survey method on a group of 203 adult, independent patients from 2021 to 2022 at a medical facility, i.e., a rehabilitation clinic. The purpose of this study was to assess the determinants of doctor–patient communication in terms of patient rights. One of patients’ rights is the right to information about their health condition and treatment methods and the right to ask questions when the doctor does not provide details about the treatment or diagnosis or when it is not understandable. Doctors providing information to the patient and the opportunity for the patient to ask questions are key elements in the process of making informed decisions regarding further medical treatment. Therefore, patients were divided into two groups: active (+) and passive in communication (−) with doctors. Results. Patients who were active in communication (33%) wanted to ask questions or had the opportunity to ask the doctor questions, and thus, they were able to take an active part in the discussion with the doctor. In contrast, patients who were passive in communication (67%) did not want to ask questions or did not have the opportunity to ask the doctor questions, and therefore, their active participation in the discussion and thus their right to ask questions may have been limited. The authors’ survey shows that respondents with active communication were significantly more likely than patients with passive communication (almost 100% vs. 86%) to obtain information about their condition (p = 0.002), diagnostic methods (p = 0.003), therapeutic methods (p = 0.00007), treatment results, and prognosis (p = 0.0008). Moreover, almost all respondents with active communication as opposed to respondents with passive communication (95% vs. 52%) rated communication with doctors highest (on a scale from 0 to 5), including credible and professional approach to patients (p < 0.0001), providing information in clear and simple language (p < 0.0001), answering questions asked by patients (p < 0.0001), openness and kindness (p < 0.0001), maintaining professional confidentiality (p < 0.0001), or emotional support (p < 0.0001). Conclusions. Hence, the primary key element of the medical consultation is appropriate amount and content of information given to the patient, providing explanations and answering questions. Also importantly, according to the results, active communication between patients and doctors was significantly influenced by female gender, higher education, and a positive evaluation of communication with doctors.