If the HL7 message contains multiple MRNs (by using a repeating MRN field), the Patient Record Processor can capture each MRN and associate it with the specified MPI. If the MRN chart data field has a filter configured, then the process stores MRNs only from message fields that satisfy the configured filter.
Multiple MRNs can be stored also when the message template uses a chart field override. However, filters set up on the MRN chart data field do not apply if a chart field override is used to pull the MRN from another HL7 message field.