AAA03 — Reject Reason Code (X12 element 901)
AA — Authorization Number Not Found
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 AA is used
Returned in AAA03 when a follow-up request references an unknown authorization. Check for truncation, added prefixes/suffixes, and cross-system reference mismatches after platform migrations.
Example
An extension request quoting an authorization number with a dropped leading zero returns AAA03 = AA.
Where it lives in the transaction
AA 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.