Method for identifying a patient for later access to an electronic patient record for the patient using a communication device belonging to an inquiring person

A method for identifying a patient for later access to an electronic patient record for the patient using a communication device belonging to an inquiring person. The patient record is stored in a database using a primary key which serves to identify the patient and which has at least one unambiguously associated secondary key, where the secondary key used to identify a patient is at least one subscriber information item which characterizes a subscriber in a wireless communication network. The secondary key for identification is transmitted between a mobile terminal used for communication in the wireless communication network and a portal via the at least one communication network.