AAA03 — Reject Reason Code (X12 element 901)
T4 — Payer Name or Identifier Missing
Draft — pending verification
This reference entry has not yet been verified against its authoritative source (X12 005010X217 TR3 / element 901 code list — verify against licensed copy). Do not rely on it for production configuration until this notice is removed.
How T4 is used
Returned in AAA03 at the information-source level. Almost always a submitter configuration or mapping defect rather than a data-entry error.
Example
A misconfigured intake integration omits the UMO identification and every request returns AAA03 = T4.
Where it lives in the transaction
T4 is a value of AAA03 — Reject Reason Code (X12 element 901), carried in the AAA (Request Validation), 278 response — returned at the loop level where the problem was found of the 278 Health Care Services Review — Response (005010X217). For the payer-side view of how PA Bridge normalizes these codes across X12 and FHIR intake, see the articles section.