A claim worth its full value on one date is worth exactly zero the next. No appeal argument recovers it, no payer relationship softens it, and no amount of follow-up effort changes it — which is why aged A/R has to be triaged by deadline rather than by balance.
Most billing problems degrade gradually. A claim gets harder to collect as it ages, appeals get slower, staff lose the context. Timely filing is not like that. It is a step function.
The day before the deadline the claim is worth its full allowable. The day after it is worth nothing, and there is no argument that recovers it. Not a good appeal, not a sympathetic reviewer, not a long relationship with the payer. The claim is dead and the only remaining question is whether it gets written off cleanly.
The windows are not the same
Medicare allows twelve months from the date of service, which is generous relative to most commercial payers — and that generosity produces its own failure mode. Practices get used to the Medicare window and apply the same rhythm to commercial claims with far shorter limits. State Medicaid windows vary more than any other payer category, and managed care plans operating inside a state program frequently set their own.
One internal rule for "how long do we have" is therefore certain to be wrong for some part of your book.
What this means for how you work A/R
The standard approach to an aging report is oldest-first. It feels disciplined. It is usually wrong, because the oldest claims are frequently the least collectable and time spent on them is time not spent on claims still inside their window.
The better triage is by recoverability: which claims still have a live filing or appeal deadline, which payers actually respond, and where the dollars are. A claim at 45 days with a 90-day window is more urgent than a claim at 200 days with nothing left.
The honest conversation about old A/R
When someone reviews an aged book, some portion of it is already past appeal. The useful thing is to say which, early, rather than billing effort against claims that cannot pay. A recovery project that starts by naming the uncollectable portion is being straight with you. One that quotes a recovery rate on the whole book has not looked.
Deadline outranks balance
A large claim with six months left is safer than a small one with six days. Working the queue by dollars puts effort where the money is and loses claims where the time is.
Deadline first, then everything else. It is the one ordering rule that prevents permanent loss.
Report on approaching, always
A report of missed deadlines is an autopsy. A report of claims approaching one is a work queue. Only the second recovers anything, and most systems can produce it with a date filter.
Keep the proof
Clearinghouse acceptance reports are the only evidence that supports a timely filing appeal. Practices that do not retain them cannot contest a denial that may well be a payer error.
Retention is cheap; the claims it protects are not.
Common questions
- What happens when a claim passes timely filing?
- It becomes unpayable. Unlike most denials there is no argument that recovers it, absent documented proof of an earlier timely submission.
- Can a timely filing denial ever be overturned?
- Only with evidence the claim was submitted within the window — usually a clearinghouse acceptance report — or where a defined exception applies.
- How do I make sure I never miss a filing deadline?
- Work A/R by deadline first, run a report of claims approaching the window, and set an internal limit shorter than your tightest payer.
- Do filing windows differ by payer?
- Enormously. Medicaid plans and commercial payers vary widely, and Medicare’s twelve months is at the generous end. One internal rule cannot be right for all.
- Does resubmitting reset the clock?
- No. The window runs from the date of service regardless of how many times the claim has been submitted.
Denials Piling Up?
We handle the revenue cycle end to end — coding by certified coders, claim submission, denial management and appeals, and A/R follow-up, with six reported numbers every month.