A diagnosis support device acquires medical image data representing a medical image obtained by imaging an animal as a subject with a medical image capturing device and type information representing a type which is classified by at least one of a body length or weight of the animal and to which the subject belongs, and determines presence or absence of an abnormality in the medical image of the subject based on the acquired medical image data and type information and a learned model learned in advance using a set of a plurality of pieces of the medical image data for learning and the type information.