Duplicate of a crossover claim
Medicare (or the primary payer) already sent this claim to the secondary payer automatically, so your direct submission is a duplicate.
Usual causes
- Secondary claim sent manually before the crossover arrived.
- Crossover and manual claim both received.
The fix
Check the status of the crossover claim with the secondary payer. Send a secondary claim yourself only when the primary remittance shows it did not cross over (for example MA19 or MA68).
Appeal or corrected claim?
Nothing to send unless the crossover failed.
Deadline to watch
Secondary filing limit from the primary remittance date, if you need to send it yourself.
Exact limits are in your payer contract or provider manual. When in doubt, send the correction or appeal this week.
Often seen together
Your secondary claim duplicated the automatic Medicare crossover. Nothing to send unless the primary remittance shows the crossover failed.
N522 in short
What does N522 mean?
Medicare (or the primary payer) already sent this claim to the secondary payer automatically, so your direct submission is a duplicate. The official X12 text reads: "Duplicate of a claim processed, or to be processed, as a crossover claim."
What usually causes a N522 denial?
Secondary claim sent manually before the crossover arrived. Crossover and manual claim both received.
How do I fix N522?
Check the status of the crossover claim with the secondary payer. Send a secondary claim yourself only when the primary remittance shows it did not cross over (for example MA19 or MA68).
Should I appeal N522 or send a corrected claim?
Nothing to send. Nothing to send unless the crossover failed.
What deadline applies to N522?
Secondary filing limit from the primary remittance date, if you need to send it yourself.