Which denial codes appear with N522?

N522 commonly rides with OA 18, OA 22. The adjustment code says the claim was reduced; the remark code says why.

Remark code

N522 denial code

This duplicates a claim that is already crossing over from another payer.

Find out which, first

A remark code is not the denial. The adjustment code says the claim was reduced. This one says why. You need both to know what to send back.

What to do

Do not resubmit. The crossover is already in flight and resubmitting creates a second duplicate. Check the primary payer's remittance for the crossover date and wait for it.

Codes it appears with

N522 commonly rides alongside these. Our reading, not a published mapping: X12 publishes no adjustment-to-remark table.

Code	What that one means
OA 18	The payer treated this as an exact duplicate.
OA 22	Another plan should pay first.

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