CO-29: Timely Filing Limit Exceeded
The time limit for filing has expired. The claim was not submitted within the payer's timely filing deadline.
Why Claims Get Denied with CO-29
Denial code CO-29 is triggered when the time limit for filing has expired. the claim was not submitted within the payer's timely filing deadline. Understanding the root causes helps prevent future denials and strengthens your appeal when one occurs.
Claim not submitted within the payer's filing deadline (typically 90-365 days)
Delayed credentialing prevented timely submission
Incorrect payer on file caused initial submission to wrong insurer
Claim was lost or not transmitted by clearinghouse
How to Appeal CO-29
This is one of the hardest denials to overturn. If you have proof of timely submission (clearinghouse confirmation, fax receipts), provide it with your appeal. Some payers allow exceptions for extenuating circumstances such as retroactive eligibility changes or delayed credentialing. Check your payer contract for specific timely filing provisions.
Documentation Required for Appeal
A successful appeal of CO-29 requires thorough documentation. Gather these items before drafting your appeal letter:
Clearinghouse transmission confirmation with timestamps
Original claim submission receipt
Documentation of extenuating circumstances
Payer contract language on timely filing exceptions
How to Prevent CO-29 Denials
Submit claims within 48 hours of the date of service. Track submission confirmations from your clearinghouse. Set alerts for claims approaching filing deadlines. Monitor claim status weekly.
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