FHIR & Da Vinci
preAuthRef
Draft — pending verification
This reference entry has not yet been verified against its authoritative source (Original definitions; regulatory facts to be verified against CMS-0057-F (89 FR 8758) and X12/HL7 documentation). Do not rely on it for production configuration until this notice is removed.
In more depth
In dual-rail architectures the same underlying authorization must present a consistent reference in both the 278 response and the PAS ClaimResponse, and on member-facing surfaces via the Patient Access API. Treating preAuthRef/certification number as one canonical identifier with format discipline avoids a whole family of matching failures.