What MA04 means
The secondary claim can't be processed without the primary payer's payment details.
How to fix it
- Attach or include the primary EOB/ERA information
- Resubmit the secondary claim
Check the remark code (RARC) that came with the denial and the payer's own policy, since rules vary by payer and plan. This is a plain-English summary written by GetMax; the official code text is published by X12 at x12.org/codes.
Prevent it next time
Most denials are caused before the claim is sent. See 12 ways to reduce claim denials, or let our denial management team work them for you.