Consolidated CDA (C-CDA)

Consolidated Clinical Document Architecture (C-CDA) is an HL7 standard for structured clinical documents encoded in XML — discharge summaries, continuity-of-care documents, progress notes — with a defined set of templates. Built on the older CDA and HL7 v3, it has been a Meaningful Use and interoperability workhorse for a decade and remains the format much real-world clinical data still moves in, exchanged over Direct, IHE, and increasingly retrieved through FHIR APIs.