The article presents the model of social hygienic evaluation of prevalence of pathology in population. The main information flows such as population morbidity according medical aid appealability, the results of patient examination in regional diagnostic center and self-assessment of patients of presence of disorders of organs and systems are considered. The stages of analysis of data information to be applied to evaluate prevalence of pathology, social hygienic value of diagnostic techniques and estimation of potential relevance of medical technologies are discussed.