What does 64 mean in AAA03?

64 (Invalid/Missing Patient ID): The patient identifier is missing or fails validation. In 278 structures the patient may be the subscriber or a dependent; this code fires when the dependent-level identification is the problem.

AAA03 — Reject Reason Code (X12 element 901)

64 — Invalid/Missing Patient ID

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 64 is used

Returned in AAA03 at the patient loop. Pair with eligibility (270/271) verification upstream so requests launch with known-good member identifiers.

Example

A dependent child submitted with the subscriber's ID in the wrong loop returns AAA03 = 64.

Where it lives in the transaction

64 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.