CO-16 Remark MA04

[TXBiller]

Can someone please help me understand and resolve this one?

CO-16:  Claim/service lacks information which is needed for adjudication.  Additional information is supplied using remittance advice remark codes whenever appropriate.  This change to be effective 4/1/2007:  At least one Remark Code must be provided

MA04:  Secondary payment cannot be considered without the identity of or payment information from the primary payer.  The information was either not reported or was illegible.

TIA

[Michele]

They are asking for the primary carrier EOB.  Medicare (or the payer being billed) is apparently secondary.