The purpose of the article is to analyze the specifics of the Ukrainian doctrine regarding the legal nature of medical services and areas for improving legal regulation. The research is based on the analysis and comparison of Ukrainian and EU law, content analysis of the terminology of legal sources, legal positions of the Constitutional Court of Ukraine, scientific researches, description and generalization of existing achievements and issues in the field of legal regulation of healthcare services. Research methods are monographic analysis, systematic and structural analysis, comparative and legal analysis, linguistic analysis, content analysis, method of generalization. The need to unify the special categorical apparatus of Ukrainian legislation has been substantiated. It has been proved that due to the improvement of domestic legislation through the implementation of the norms of European private law, the doctrine and practice of legal regulation will correspond to the nature of the regulated relations. The content, structure, and specific features of legal relations for the provision of medical services in the Ukrainian legal system have been determined. The authors have made a conclusion about the private legal nature of medical services in the domestic legal doctrine. Recommendations have been made for the legislation of Ukraine, which regulates civil relations for the provision of medical services, regarding the introduction of special norms related to the personal non-property rights of the relations' participants, contractual representation of a patient, legal terms for the provision of medical services without obtaining the consent.