If there is more than one patient with the identical last name, first name, and middle initial, the master patient index entries are arranged according to which data element?

If there is more than one patient with the identical last name, first name, and middle initial, the master patient index entries are arranged according to which data element?

• A. Date of birth
• B. Medical record number
• C. Admission date
• D. Social security number

Answer: (B)

When two or more patients have the same name, the master patient index relies on a unique identifier to separate their records. The medical record number is designed for this purpose: it's assigned once at initial registration and stays with the patient across all encounters and facilities. Because the MRN is unique to each person, sorting or indexing the MPI by this number keeps the records distinct and easy to retrieve, even when names are identical. Dates of birth can help, but they aren’t guaranteed unique, and admission dates vary by visit, so they aren’t reliable for consistent ordering. Social security numbers are sensitive and not routinely used for indexing. So, the data element used to arrange these entries is the medical record number.

When two or more patients have the same name, the master patient index relies on a unique identifier to separate their records. The medical record number is designed for this purpose: it's assigned once at initial registration and stays with the patient across all encounters and facilities. Because the MRN is unique to each person, sorting or indexing the MPI by this number keeps the records distinct and easy to retrieve, even when names are identical. Dates of birth can help, but they aren’t guaranteed unique, and admission dates vary by visit, so they aren’t reliable for consistent ordering. Social security numbers are sensitive and not routinely used for indexing. So, the data element used to arrange these entries is the medical record number.