The Medical Alert Processor uniquely identifies alerts based on both their HL7 code and assigning authority. HL7 messages do not need to provide assigning authorities for medical alerts, but the assigning authority will be recorded if provided.
The assigning authority is the value in the third component of the HL7 field containing the MedAlert - Alert ID value. This location is not configurable. If a value is provided in this location, it will be used as the assigning authority for the specified alert.