Background. The lack of a system for evaluating the feasibility of new trauma and orthopedic departments in outpatient clinics under construction creating is one of the main reasons for the imbalance in their territorial location. Therefore, one of the most urgent modern tasks in the megalopolis healthcare organization — is to develop a system for effective regulation of the trauma and orthopedic outpatient departments network construction. The purpose of the study is to improve the effectiveness of outpatient trauma and orthopedic care for megalopolis residents. Materials and Methods. In the research process, theoretical (formalization, synthesis, deduction) and empirical (observation, comparison, modeling, measurement) methods were used. A total of 67 emergency trauma outpatient departments in Moscow were sampled and data on their attendance for April 2019 were collected. Results. Creation of a mathematical model of the network of outpatient primary trauma care and a basic algorithm for estimating the average time from the moment a patient received injuries to the time of primary care in one of the emergency outpatient trauma units of the medical organizations of the capital, which can be used by the executive bodies of the healthcare organization cities in solving administrative and economic problems. Conclusion. The developed specialized mathematical algorithm for assessing the existing effectiveness of the already existing emergency outpatient trauma units network and the distribution of new units allows you to create an “ideal” model for the location of these deparments in a megapolis. In the future, this model can be developed taking into account the development of the transport network, the financing of emergency rooms, etc.