A method is for managing an electronic medical record (EMR) entry which is to be written into a data storage device possessed by a patient and includes generating information associated with a health professional who provides a health care service that results in the EMR entry, and a location which is related to the health care service, determining whether to permit writing of the EMR entry into the data storage device according to the information thus generated, determining whether the patient agrees with writing of the EMR entry into the data storage device according to input of the patient, and writing the EMR entry into the data storage device when writing of the EMR entry is permitted by the EMR management system and is agreed upon by the patient.