Which database identifies patients across different health systems?

Which database identifies patients across different health systems?

• A. Electronic Prescriptions (E-prescribing)
• B. Master Patient Index (MPI)
• C. Electronic Health Records (EHRs)
• D. CDSS

Answer: (B)

Identifying patients across different health systems relies on a mechanism that links records belonging to the same person no matter where they are created. The Master Patient Index performs this role. It stores key demographic details and unique identifiers from multiple organizations and uses matching rules to determine when records from different systems actually belong to the same individual. By linking those records, it creates a single, longitudinal view of a patient’s history, enabling seamless care coordination, accurate data sharing, and reduced duplicates. This differs from electronic health records, which are the actual patient data stored within a single organization. Electronic prescriptions pertain to sending medication orders electronically, not identifying patients across systems. A clinical decision support system provides guidance based on data but is not itself a cross-system patient identification database.

Identifying patients across different health systems relies on a mechanism that links records belonging to the same person no matter where they are created. The Master Patient Index performs this role. It stores key demographic details and unique identifiers from multiple organizations and uses matching rules to determine when records from different systems actually belong to the same individual. By linking those records, it creates a single, longitudinal view of a patient’s history, enabling seamless care coordination, accurate data sharing, and reduced duplicates.

This differs from electronic health records, which are the actual patient data stored within a single organization. Electronic prescriptions pertain to sending medication orders electronically, not identifying patients across systems. A clinical decision support system provides guidance based on data but is not itself a cross-system patient identification database.