The medical communication system comprises a plurality of medical identification devices (12). Each identification device (12) is attached to one particular patient (14). A registration processor generates a unique patient identification data that is stored in an electronic patient identification code memory (54). Each identification device (12) includes an intra-body wireless communication device (16) which transmits the patient's identification on the patient's body. A medical device (22), which is linked to the patient (14) to measure a vital function, periodically automatically receives the patient's identification code to continually ensure association to a correct patient.