An image processing apparatus includes an extractor that receives sheet image data that is generated by reading an image on a medical record sheet onto which basic medical information and encoded information of the basic medical information are printed, and extracts, from the sheet image data, information image data representing a portion where the basic medical information is printed, an image generator that generates reference image data representing the basic medical information, based on the encoded information represented in the sheet image data, and a detector that detects a correction that is to be performed on the basic medical information printed on the medical record sheet, based on a difference between the information image data and the reference image data.