There are provided a medical image processing device, an endoscope system, a diagnosis support device, and a medical service support device that can allow the observation of a medical image performed by a user not to be obstructed, allow a user not to miss a region of interest, and allow attention required during observation to be continued. An image acquisition unit acquires a medical image including a subject. A medical image is displayed in a first display region (A1) of a monitor (18). A bounding box (74), which is notification information, is superimposed and displayed on the medical image in the first display region (Al). In a case where the area of a region of interest (ROI) is increased, or the like, the notification information is not displayed in the first display region (Al) and an icon (76), which is separate notification information, is displayed in a second display region (A2) of the monitor (18).
