Master Patient Index (MPI) is a database that maintains a unique index (or identifier) for every patient registered at a health care organization. The MPI is used by each registration application within the HCO to ensure a patient is logically represented only once and with the same set of registration demographic / registration data in all systems and at an organizational level. It can be used as enterprise tool to assure that vital clinical and demographic information can be cross-referenced between different facilities in a health care system. A MPI correlates and cross-references patient identifiers and performs a matching function with high accuracy in an unattended mode. A MPI is considered an important resource in a healthcare facility because it is the link tracking patient, person, or member activity within an organization (or enterprise) and across patient care settings.
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