Denial 5H501 Billing error and appeals process

e recently had a denial 5H501 "Rug code billed in error.' I am unsure if we should "appeal" this using the redetermination process or re-bill it or both.
The facility did not complete the EOT correctly on the MDS. They did the EOT, but put dashes in the therapy section instead on an end date. This resulted in billing in correctly.

The MDS has since been corrected.

I am unsure if we bill this or appeal or both.
thank you

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