MA64 remark code

Remittance advice remark code MA64. Remark codes add detail to the reason code on the same claim line.

Third payer needs both prior payments

Unofficial reference. This is our own plain-English explanation, not the official code text. Payer rules differ. Verify with the payer and the official X12 code list. AlphaPrefix is not affiliated with X12, CMS or any payer. Data last updated Nov 11, 2026.

What MA64 means

The payer believes it is third in line and needs the primary and secondary payers' payment details first.

The payer's records show two other payers ahead of it for this patient. It cannot process the claim until it sees what both of them paid or denied.

It usually comes with reason code 16 or 22. A tertiary claim needs the adjudication details from both earlier payers.

Common causes

• The claim reported only one prior payer when the patient has two.
• The claim was sent before the secondary payer had processed it.
• The order of coverage on file differs from what the claim showed.

What to do next

1. Confirm the order of all three coverages with the patient and payers.
2. Collect the primary and secondary remittances.
3. Resubmit with both payers' information included.

Related codes

• MA04 (remark code) Primary payer information needed
• MA92 (remark code) Other insurance plan details missing
• 22 (reason code) Another payer may be primary