Health Level Seven (HL7) V3 & Clinical Documentation Architecture (CDA)

HL7 Version 3 (HL7 V3) and Clinical Documentation Architecture (CDA) are messaging and document standards that enable the electronic exchange of clinical information between different healthcare systems. HL7 is no longer actively developing the Version 3 (V3) Standard and has shifted its primary focus to FHIR (Fast Healthcare Interoperability Resources). However, some V3 components are still in use, especially in large systems like HL7 Clinical Document Architecture (CDA), which is based on V3 concepts.

HL7 V3 provides a structured framework for secure and standardized health data messaging, ensuring interoperability across various clinical applications.
CDA defines a common format for clinical documents, allowing both structured and unstructured health information to be shared, stored, and retrieved consistently.

These standards act as trusted couriers, ensuring that patient data is accurately transmitted and accessible across healthcare organizations, supporting care coordination and clinical decision-making.

Information on this page supports HL7 version 3 and CDA. There is a unique page for information supporting HL7 FHIR.

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Pan-Canadian CDA 
Pan-Canadian V3

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