1. A medical information display apparatus comprising: a timeline display means that displays a timeline representing a time axis on a display device; a timeline selection input receiving means that receives a selection input selecting a predetermined period on the timeline; an electronic medical record information retrieval means that obtains a set of pieces of electronic medical record information by retrieving, from an electronic medical record storage means that stores a multiplicity of pieces of electronic medical record information, electronic medical record information about examination and treatment received by a predetermined person to be examined during the selected period; an examination target region extraction means that extracts all of at least one examined region that is recorded in the set of pieces of electronic medical record information; and an examined-region position display means that displays an external view image representing an external view of a human body on the display device, and superimposes one or more marks, each of which represents each of the extracted all of at least one examined region, at one or more positions corresponding to the examined region in the external view image, wherein the timeline selection input receiving means receives the selection of the predetermined period by setting a mark indicating a start time of the examination period and a mark indicating an end time of the examination period on the timeline.