Active Integration:

Active integration stops duplicate records before they happen, at the point of registration. When an organization has the NextGate EMPI installed with active integration, an individual can check the EUIDs across their enterprise during the registration process before creating a new, and potentially duplicate, patient record.

Alert Notifications and Reports:

Alerts and notifications are based on user-defined conditions. Various reports detail EMPI activity like Potential Duplicates by System or Facility, Automatic Merges, User Quality, etc.

ABAC (Attribute Based Access Control):

System access rights are granted to users through the use of policies which combine attributes together. Compare to Role Based Access Control (RBAC) where access is pre-determined based on role.

AWS (Amazon Web Services):

AWS is the secure cloud services platform NextGate uses to host our fully-managed EMPI.

Learn more about our cloud services:

Biometric Authentication:

Biometric authentication is a user identity verification process that involves biological input, such as the scanning or analysis of some part of the body. Facial recognition and palm scanners are among the most common uses in healthcare.


A blockchain is a growing list of records, called blocks, that are linked using cryptography. It is an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way.

Blockchain may be helpful in the healthcare industry for developing innovative solutions to improve interoperability and patient matching. Learn more in this post “Three Ways Healthcare Can Benefit from Blockchain.”


Removal of all undetected duplicate medical records within a patient database system. This also includes the merging of records belonging to the same individual.

Common Patient Identifier:

Each EMPI patient record is assigned a unique identifier and stores all associated local identifiers for the patient.

Configurable Matching Thresholds:

Configurable thresholds determine when the EMPI should merge records or flag them as potential duplicates. The thresholds are set after a few test iterations, ensuring the most precise matching accuracy for your data.

Data Analysis and Normalization:

EMPI implementation includes an intensive data analysis to determine metadata characteristics, to identify duplicate and potentially duplicate records across existing data sets, and to standardize/normalize data (e.g. First Street and 1st St.)

Data Governance:

As healthcare is quickly moving to meet the demand of analyzing and making sense of big data, data governance is a set of policies and strategies that address the creation and use of granular data as inputs into a system.


Data Stewardship User Interface:

EMPI data quality is managed through a configurable user interface. Authorized users can resolve duplicates, unmerge records, and view a complete history of record activity.

Duplicate Record:

A single patient associated with two or more assigned medical records or MRNs (medical record numbers) within the same hospital or facility, or even in two or more facilities within an enterprise.

Enterprise Master Patient Index (EMPI):

An EMPI is an enterprise-wide solution that enables healthcare organizations to uniquely match records across disparate systems into a single, longitudinal view of patients for real-time data exchange, enhanced clinical decision-making and care collaboration.

Enterprise Unique ID (EUID):

Within our EMPI, patient records from disparate systems across an enterprise are reviewed and related records are linked together under an EUID, creating a single best record entry.


Set of geographical coordinates corresponding to a location. Geocoding helps standardize address data and thus increases likelihood of identifying of disqualifying a patient record match.

Graph Technology:

A graph database uses graph structures for semantic queries with nodes, edges and properties to represent and store data. Our Relation Registry utilizes advanced graph database technology to capture the complex web of data and events surrounding a patient.

Information Technology Infrastructure Library (ITIL):

ITIL is a globally recognized framework that contains a comprehensive set of best practices used to develop and execute IT service management.


The EMPI supports IHE Integration profiles, standards-based APIs, web services and other forms of integration to connect to external systems.


Interoperability describes the extent to which systems and devices can exchange data, and interpret that shared data. For two systems to be interoperable, they must be able to exchange data and subsequently present that data such that it can be understood by a user.


Location Intelligence:

Business intelligence tool that relates geographic context to actionable insights. See also geocode.

Machine Learning:

Machine learning is a field of computer science that uses statistical techniques to give computers the ability to “learn” with data, without being explicitly programmed.

Managed Service Provider (MSP):

A managed service provider (MSP) monitors and maintains a customer’s IT system for a monthly fee.

Master Patient Index (MPI):

A master patient index (MPI) contains and identifies patient records within a healthcare system or facility. Also sometimes known as Master Person Index.

Click here to read more about evaluating the differences between an MPI and an EMPI.

Matching Logic:

Nearly 100 probabilistic algorithms, designed for the healthcare environment, are invoked to achieve the highest level of matching accuracy. The EMPI handles data errors and variances, nicknames and aliases, multiple births, “Jane Doe”, and many other data quality situations.

Medical Record Remediation:

Process for resolving duplicate or incomplete medical records.


Combining or “merging” two or more of an individual’s medical record into one.

National Patient Identifier (NPID):

A unique number (or alphanumeric identifier) permanently assigned to an individual to be used across the entire spectrum of a national healthcare system. Example: NHS Number used in England. The U.S. does not currently have an NPID.


Two separate individuals mistakenly sharing the same medical record. An overlay occurs when an individual’s record is overwritten with data from another patient’s record, creating a combined, inaccurate record.

Patient Attribution:

Patient attribution is the process of assigning a patient to a provider or providers for population health programs, ACO participation, insurance claim processing and other relationship dependent activities.

Patient Matching Algorithm:

The patient matching algorithm is the computerized process of comparing different demographic elements from different health IT systems to determine if they refer to the same patient.

Probabilistic Matching:

Probabilistic matching occurs when several field values are compared between two records and each field is assigned a weight that indicates how closely the two field values match. The sum of the individual fields weights indicates the likelihood of a match between two records.

Provider Directory:

A Provider directory is comprehensive list of doctors, hospitals and other healthcare providers that belong to a network.

Provider Registry:

A provider registry connects health plans, provider groups and other health care organizations to enable the exchange and validation of provider related information.

Source of Truth:

The EMPI assembles a “Single Best Record” or “Golden Record” comprised of the most trusted demographic data on a patient.

Referential Matching:

Demographic information collected outside of healthcare that can be used in conjunction with your EMPI to help determine if an individual’s record is a match across systems. See also third-party data.

Read more about why an EMPI is critical to maximize the gains of referential matching:

RBAC (Role Based Access Control):

Role based access control restricts system access to authorized users (pre-determined based on role). See also Attribute Based Access Control (ABAC).

SaaS (Software as a Service):

SaaS is a licensing and delivery model in which software is licensed on a subscription basis and is centrally hosted.

SDOH (Social Determinants of Health):

The social determinants of health are the conditions in which people are born, grow, live, work and age.

Source: World Health Organization:

Third-Party Data:

Demographic information collected outside of healthcare, including public record and credit bureau data, that can be used in conjunction with your EMPI to help determine if an individual’s record is a match across systems. Sometimes referred to as referential matching.

Total Cost of Ownership (TCO):

Total cost of ownership is a financial estimate intended to help buyers and owners determine the direct and indirect costs of a product or system.


The NextGate Workflow Manager orchestrates EMPI activities, such as record clean up, record merge approvals, and data governance procedures.