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.
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.