The article reveals the problem of diagnosing urgent pathology in childhood at the prehospital stage of emergency and emergency medical care. The revealed diagnostic errors make it possible to focus the attention of doctors on the most common discrepancies in the diagnoses of the prehospital and inpatient stages. The purpose of the work: to identify the structure of the discrepancy of diagnoses in the provision of SMP to children with the data of the reception department of a children’s hospital. Materials and methods:13957 case histories of children aged 0 to 17 years hospitalized by ambulance and emergency medical teams were analyzed. The frequency of discrepancies between the diagnoses of the prehospital stage and the reception department of the hospital, depending on the nosological variant of pathology and the age of children, was determined. The results of the study: The most frequent discrepancies in diagnoses were found in children of the first 7 years of life with acute respiratory pathology and infectious diseases. In children from 12 to 17 years of age, the differences in diagnoses were mainly due to cases of acute surgical pathology and were associated with over diagnosis and the complexity of assessing the child’s condition. Conclusion: Based on the results obtained, it is shown that there is a need for a more in-depth study of the features of the diagnosis of acute infectious diseases and respiratory pathology in children, as well as a differential approach in cases of urgent surgical pathology during advanced training and professional retraining of emergency and emergency physicians.