Enterprise Master Patient Index

Master Patient Index

Enterprise Master Patient Index (EMPI) is a repository containing a registry of all patients across an enterprise. An EMPI provides many benefits including:

  • Maintaining a central registry of all patients and their demographics, assigning a unique identifier to each patient.
  • Eliminating duplicate patient registration entries that result due to changes in patient demographics (patient moved to another location), data entry errors during patient registration, or missing demographic information.
  • Providing record locator services by enabling physicians to identify which health care providers a patient has visited, across the enterprise.

The key functionality provided by an EMPI is its ability to identify matching patient registration records and link them together as they represent information about a single entity. An EMPI needs to be able to perform this record linkage even in the presence of errors and missing attributes. This key functionality is provided by a matching algorithm. There are a wide variety of matching algorithms that have been used in practice but they are classified into two Algorithmic categories:

  • Deterministic Algorithms – that search for an exact match between attributes
  • Probabilistic Algorithms – that search for an approximate match between two records

EMPI is standards-based across the enterprise and is designed to be extensible. Its architecture uses principles of SOA services, including a matching algorithm service, that can be altered simply through changes to the configuration file. EMPI includes deterministic and probabilistic algorithms that can be plugged into the system without any modifications.

Benefits
  • Access Critical Care Data
  • Improved Patient Services
  • Provide Better Care
  • Synchronize Data
  • Tracks Across Organization
Interface
  • Assisted Living
  • Daycare
  • Outpatient
  • Skilled Nursing
  • Waiting List
  • Health Info Exchange