The objective of this study is to analyze indicators influencing the demand planning indicators for medical activities in a healthcare organization. The article analyzes statistical data on the size and structure of the population assigned to a medical organization, Form No. 12 "Information on the number of diseases registered in patients living in the service area of the medical organization." Primary medical documentation data for 723,614 visits reflected in the statistics of the assigned population was compared with the registration of 952,016 cases of diseases for 2019-2024. The main trends in the structure according to the ICD-10 classification are due to a downward trend in most nosologies, while an increase in cases of respiratory diseases has been recorded. When planning the distribution of funds and resources, it is important to consider the characteristics of the sex and age composition, as well as the dynamics of morbidity by nosological classes.