Category: Master patient index

A patient-matching call at the integration boundary can take two shapes. The spec-aligned shape is `Patient/$match`, the FHIR operation that returns a Bundle of candidate Patient resources ranked by match score. The vendor shape is a propri

A multi-payer network has to pick between an MPI and an EMPI, and the choice has real architectural consequences. The terminology blurs in vendor marketing because every product calls itself both, but the underlying design assumptions diver

A research data warehouse runs an EMPI under different constraints than a clinical one. Match decisions need to be defensible to an IRB long after they are made, the cohort has to remain stable across reanalysis cycles, and the same patient

Cross-border patient identity stresses an MPI on three independent axes at once: divergent national identifier policies, multi-language demographic data, and regulatory rules about what may cross which boundary. The four engines below cover

Medication reconciliation depends on the MPI underneath it more than any other clinical workflow. Pharmacy fills, inpatient orders, ambulatory prescriptions, and home medication lists rarely use the same identifier for the same patient, and

Pediatric immunization tracking has matching characteristics that are unkind to most MPI tools. Patient identifiers change as children move between practices, demographics shift with custody changes, and the registry has to deduplicate agai

Emergency response and disaster recovery stress an MPI in ways routine operations do not. Patient identifiers are missing or wrong, demographic data is partial, and the population moves through unfamiliar facilities under time pressure. The

A payer eligibility workflow lives or dies on the MPI underneath it. The same patient appears with different identifiers on the member file, the EDI 270 transaction, and the clinical FHIR feed, and the MPI is the layer that decides whether

A population health MPI has to hold up under feeds from ambulatory, inpatient, behavioral, pharmacy, and payer sources at the same time. In 2026, the products that handle this reliably have stabilized into a recognizable set. The seven tool

A Master Patient Index in a population health stack does more than dedupe a chart list. It anchors attribution, drives risk stratification cohorts, and decides which encounters belong to which member across plan and provider boundaries. In