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Corrected claim, CWF updated now.

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workerbee:
We billed Medicare primary and they denied saying Cigna should have been primary.  Now the Common Working File has been updated and Medicare says they will pay as primary if I send them a corrected claim bill type 137.  BUT, I'm not changing anything on the claim, so how can it be a corrected claim?  Which condition code would I put, and which two-letter adjustment reason code would I put in the remarks at the bottom left of the claim form?

Note:  I have to mail them a paper claim because our electronic billing has been shut off. This is a hospital claim.  I can't correct in DDE either.

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