Introduction. In the conditions of modern development of medical science and practice, functional diagnostics is one of the rapidly developing areas. Functional methods of research, according to modern recommendations, are the basis for establishing the correct diagnosis. The purpose of the study was to analyze the sources of literature on the service of functional diagnostics, characterizing the activities of its departments and offices. Material and methods. The descriptive method of statistics and content analysis of literature sources on the activities of departments and offices of functional diagnostics were used. Results. The analysis of literature sources characterizing the activities of departments and offices of the functional diagnostics service in the Russian Federation, which showed the need to revise the norms of time and load of medical specialists. Conclusion. To improve the quality of medical care for patients and timely diagnosis of diseases, it is necessary to revise the norms of time and load on medical specialists.