When a user attempts to access OnBase Patient Window, the following error may be displayed, and the user will be unable to access the patient record:
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Master Patient Index was not found for given Medical Record Number
This error is displayed when the query string provides an invalid or non-unique MRN without another identifier (like MPI).
Non-unique MRNs may exist if OnBase is configured for overlapping MRNs and assigning authorities. If the mrn value in the query string matches multiple MRNs, then the query string must also include either the MRN's assigning authority or an mpi value to identify the correct patient record.