A fault diagnosis apparatus acquires, by using an acquisition unit, for each of a plurality of medical devices, installation environment information including a plurality of items about an installation environment in which each of the plurality of medical devices is installed; classifies, by using a classification unit, the plurality of medical devices into a plurality of groups on the basis of the installation environment information; extracts, by using an extraction unit, an item in the installation environment information representing a feature of a group to which a device in which a fault has occurred among the plurality of medical devices belongs, the feature being different from that of the other groups; and performs control, by using a display control unit, to cause a display unit to display an extraction result obtained by the extraction unit.