A timely filing denial can be appealed when you can prove the claim was originally submitted inside the payer's window, or when a documented circumstance outside the practice's control caused the delay. The appeal stands or falls on the submission proof you attach.
What proof of timely filing do payers accept?
The strongest proof is a clearinghouse acceptance report showing the payer accepted the original claim, with the submission date visible. Electronic acknowledgment records, a payer-portal submission history, or a certified-mail receipt for paper claims serve the same role.
Can you appeal if the claim really was filed late?
Sometimes. Payers recognize documented exceptions — a primary payer that was slow to respond on a coordination-of-benefits claim, incorrect eligibility information supplied by the payer, or an outage in the payer's own systems. Document the circumstance and state plainly why the delay was outside the practice's control.
Where do you find the payer's filing window?
In the payer's provider manual — and the window depends on the product and its regulator, not just the payer's name. Our verified deadline tables quote each payer's published rule verbatim with a link to the source document.
How do you prevent timely filing denials?
Work claim rejections daily: a rejected claim was never received, so the filing clock keeps running while it sits. Keep clearinghouse acceptance reports as a matter of routine, and treat resubmissions with the same urgency as new claims.