The study provides a thorough and detailed analysis of the organizational and legal measures for the formation and implementation of the St. Petersburg Electronic Medical Card (hereinafter - EHR) in 2018. The basis for the introduction of EHRs is the integral rating of medical organizations in terms of connecting to the regional fragment of the unified state information system in the health sector, and data transfer to the EHR (hereinafter referred to as the Rating), as well as the accumulated experience of digitization in the field of healthcare. Authors examine quantitative and qualitative indicators, and statistical evaluation of the effectiveness of the introduction of EHR in the dynamics. The analysis of the interest and involvement of health managers and consumers of data Rating. The conclusion contains the authors’ proposals on the development of the Rating within the framework of the National Healthcare Project (Digital Healthcare Contour) and the National Data Management System.