The general practitioner is an important figure in the provision of medical care during radiation incidents and cases of radiological terrorism. Knowing the nature of the radiation injury is essential for correct diagnosis and treatment. Insufficient knowledge of most physicians, and of general practitioners in particular, on the clinical manifestation of radiation injuries is the reason such conditions remain unrecognized and improperly treated. We suggest some simple diagnostic criteria for assessment of the injured by general practitioners, based on the results of our own studies and on the recommendations of prominent international organizations. (Disaster Med Public Health Preparedness. 2018;12:507–512)