Standardization is one of the most important tools for ensuring the quality of medical care. The paper presents analysis results of a number of existing federal and regional standards that regulate the processes of providing medical care, which confirm the need and expediency of developing internal standards for diagnostic and treatment processes (DTP) in a medical institution. The authors also formulate requirements for their minimum content. The importance of the effective implementation of the developed internal DTP standards necessitates the development of a methodological approach to standard execution support and analysis.The approach presented in the article is methodically based on the use of modified operogrammes, which allow taking into account the DTP specifics and resource equipment of a particular medical institution. The authors propose key areas for standard execution support and possible forms of implementation in information systems, as well as basic directions for standard execution analysis with integral indicators for assessment of those standards.Approbation of the developed methodological approach was carried out on the example of the N.V. Sklifosovsky Research Institute for Emergency Medicine in terms of DTP standard execution support and analysis in relation to ordering laboratory, instrumental tests and consultations at various stages of the patient treatment process. The results of the approbation confirmed that the introduction of the methodological approach increases the effectiveness of the implementation of the developed DTP standards in the activities of a medical institution, and also ensures the achievement of a number of important systemic management effects.