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HL7 and FHIR Integration: A Primer for Healthcare Software Teams | Clickmasters

Healthcare data flows through HL7 v2 (the installed reality) and FHIR (the API-era standard) — integration means speaking both, mapping messy

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— Insights

How This Solution Helps Your Business

[ THE TWO-STANDARD REALITY · 01 ]

HL7 v2 pipes run hospital interfaces today (ADT, orders, results); FHIR's REST/JSON resources power modern APIs and patient-access mandates — production integration usually bridges both.

[ FHIR IN PRACTICE · 02 ]

FHIR in practice

Resources (Patient, Observation, Encounter) with references between them, SMART on FHIR for auth into EHR contexts, and US Core profiles as the interoperability floor — the standard is readable; the implementations vary.

[ WHERE INTEGRATIONS ACTUALLY · 03 ]

Where integrations actually break

Site-specific v2 variants, terminology mapping (codes differing by system), and EHR sandbox behavior diverging from production — interface engines and integration platforms exist because point-to-point breaks first.

[ COMPLIANCE CONTEXT · 04 ]

Compliance context

PHI flowing through interfaces inherits HIPAA obligations — BAAs, audit trails, and minimum-necessary design apply to the pipes, not just the apps.

Skipping the discipline this article describes until an incident, audit, or stalled project forces it — every practice above is cheaper adopted early than retrofitted under pressure.

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