The general advice for old accounts receivable — work the aging report, follow up, appeal what can be appealed — is covered in our guide to how to work old A/R. This article is narrower: it covers one bucket, claims already past 120 days, because the work changes at that line. Deadlines that were distant at day 40 are close or closed at day 125, and the balance competes with fresh claims that are easier to resolve.
The stakes are not abstract. In an MGMA Stat poll of medical group leaders (Jan. 6, 2026; 288 applicable responses), denials and appeals were named the biggest revenue-cycle leak by 48% of respondents — the largest single category. Claims past 120 days are where that leak pools, and working them takes a different sequence: triage first, escalation second, and a fixed weekly cadence so the bucket shrinks instead of refilling.
Why the 120-day line changes the work
The younger buckets are mostly a follow-up problem: a claim at 30 or 60 days usually needs a status check, a missing piece of information, or a corrected submission, and a claim at 90 days needs urgency as payer deadlines begin to bite. Past 120 days, the problem is triage against closing windows.
Three clocks matter in this bucket, and none runs on a universal schedule: the timely filing limit for the original or corrected claim, the appeal window after a denial, and any dispute window in the practice’s payer agreement. Each is set by the payer, the plan, or the contract, and they differ widely — a commercial contract, a Medicare Administrative Contractor’s schedule, and a state Medicaid program will not match. Our reference on timely filing limits explains why no single deadline can be assumed. Look up the deadlines governing each claim before working it: a claim with ten days of appeal rights left and a claim with ten months left are both “over 120 days,” but they should not be worked in the same order.
Step 1: Triage by collectibility, not by balance alone
Do not work this bucket from the top of the aging report down. Sort it into four lanes first — each has a different next action and a different clock.
Lane 1 — Never adjudicated. No payment, no denial, and no clear payer response. The claim may never have been received, may be pending information, or may be sitting in a payer queue. The next action is a status check, not an appeal. These are often the most recoverable claims in the bucket, because no adverse decision has been made yet.
Lane 2 — Denied, with appeal or correction rights remaining. A decision exists and a remedy window is still open. Order these by days remaining in the window, then by dollar value: a smaller claim expiring this week outranks a larger claim with months left.
Lane 3 — Denied, with remedies closed or nearly closed. The appeal window or filing deadline has expired, or the payer has issued a final determination. A few may still have a contractual or regulatory path; most are heading toward a documented write-off decision. Do not let this lane consume the hours the first two lanes need.
Lane 4 — Resolved incorrectly. Paid below the contracted amount, applied to a deductible already met, or closed with a patient balance that belongs to a payer. These need a contract or remittance review, not a standard appeal.
Separate payer balances from patient balances before triage — they run on different rules, deadlines, and communication standards. When the sort is done, every claim should carry three things: a lane, a named owner, and a next-action date. A claim without all three is not being worked; it is being stored.
Step 2: The escalation ladder, by payer type
Once a claim is in the right lane, move it up a defined ladder instead of repeating the same phone call. Each rung produces documentation the next rung needs.
| Rung | Action | What it produces |
|---|---|---|
| 1. Status check | Confirm receipt and claim state through the portal, EDI status, or a payer call | Claim status, received date, payer reference or call number |
| 2. Corrected claim or rebill | Fix a billing defect — wrong code, missing information, wrong payer — and resubmit within the filing limit | A clean submission tied to the original claim, with proof of timely filing |
| 3. Formal appeal | Dispute a payer decision with the remittance, contract terms, and supporting records attached | A dated appeal packet inside the appeal window |
| 4. Payer escalation | Move beyond front-line review: provider representative, supervisor review, or the route named in the contract or program rules | A named contact, a case number, a promised decision date |
| 5. Documented close | If no remedy remains, prepare the claim for a write-off decision with the full history attached | A complete file a manager can decide on evidence |
Two distinctions keep the ladder honest. A corrected claim fixes an error the practice made; an appeal disputes a decision the payer made — and sending the wrong one can waste the little window that remains. And escalation is not repetition: if rung 3 produced a denial, rung 4 must add something — a contract clause, a record the reviewer did not have, a supervisor — rather than resending the same packet.
The ladder’s shape is the same for every payer; the details are not. Medicare appeals follow the Medicare Administrative Contractor’s redetermination process and its timeframes. For contracted commercial payers, the provider agreement usually names the dispute route and deadline, and a state insurance department complaint is a later step, not a first one. Medicaid follows state program rules, which vary by state. Patient balances follow the practice’s statement and payment-plan process, on their own track.
Step 3: A weekly workdown cadence
Old A/R grows back when the work is occasional. A fixed weekly rhythm keeps it shrinking:
- Start of week — re-triage. Pull a fresh aging report, move claims between lanes based on last week’s results, and list every deadline expiring in the next 14 days. That expiration list is worked first.
- Midweek — batched payer work. Group status checks and calls by payer, so one session clears many claims with the same plan. Assemble appeals in this block too, while the relevant remittances and records are open.
- End of week — review movement, not effort. Record dollars collected from the bucket, claims closed, claims advanced a rung, and the new 120+ total and count. If the total is not falling week over week, younger buckets are feeding it faster than it is being emptied — name that upstream problem in the same review.
Track one ratio alongside the dollars: A/R over 120 days divided by total A/R. It shows whether the oldest bucket is a shrinking residue or a growing share of everything owed.
Documentation standards for old claims
At 120 days, memory is worthless; the file is the claim. Log every touch with the date, channel, payer representative’s name, call or case reference number, what was promised, and when it falls due. Keep the original claim, every corrected claim, the remittances, and proof of timely filing together, so a reviewer — or a new staff member — can reconstruct the history without starting over.
Appeal packets deserve the same discipline: name the determination being disputed, cite the contract language or program rule behind the practice’s position, and attach only the records that prove the point. A thick packet is not a strong packet; a short, specific one is easier to approve.
When to stop: the documented write-off decision
Some claims in this bucket will not be paid, and pretending otherwise keeps staff hours flowing to dead balances. A write-off is defensible when the file shows the ladder was climbed — status verified, correction or appeal filed inside its window, escalation attempted — and the remaining remedy is confirmed closed: filing and appeal rights expired, coverage confirmed never in force, or a balance below the cost-to-pursue threshold set in the practice’s own policy. Contractual adjustments are not write-offs and should never be recorded as one; they are obligations under the payer agreement, and mixing them hides both problems.
Document the decision itself: amount, reason, the deadline or determination that closed the claim, and a manager’s approval. Our guide to when to write off a balance covers the approval and accounting side in more detail. A documented write-off closes a claim; an undocumented one makes it disappear while the underlying failure stays in the process to produce the next one.
Fastora’s A/R recovery work starts with this same triage and is priced as a percentage of collections or a flat monthly fee.
Frequently asked questions
How long do I have to appeal or correct a claim that is already 120 days old?
It depends entirely on the payer, the plan, and your contract. Appeal windows, corrected-claim deadlines, and dispute periods are set individually; there is no universal number of days. Check the remittance for the appeal deadline, the contract for the dispute window, and the Medicare Administrative Contractor’s schedule for Medicare claims — before assuming any of them have closed.
Should I work the oldest claims first, or the largest balances first?
Neither, on its own. Triage by lane first, then by deadline inside the lane: a claim whose appeal window closes this week comes before a larger claim with months remaining. Dollar value breaks ties; it should not override an expiring remedy.
Is a claim over 120 days still collectible?
Often, yes — particularly claims never adjudicated and claims denied with appeal rights still open. Collectibility turns on deadlines, coverage, and documentation, not age alone. Age matters because it consumes the windows, which is why the deadline check comes before the work.
What is the difference between a corrected claim and an appeal at this age?
A corrected claim fixes an error in what the practice submitted; an appeal disputes a decision the payer made. Each route has its own deadline, and choosing the wrong one can let the right one expire.
When should an old claim be written off?
After the file shows the ladder was completed and the remaining remedy is confirmed closed — an expired filing or appeal window, confirmed absence of coverage, or a balance below the practice’s documented cost-to-pursue threshold — with a manager’s written approval.
Why did these claims reach 120 days untouched?
Usually because follow-up capacity goes to fresh claims first, no one owns the oldest bucket, and accounts sit without a next action or date. MGMA respondents also named eligibility and coordination-of-benefits problems and timely filing among the drivers behind denial leakage.
Conclusion
The 120+-day bucket is a deadline-management problem, not a bigger version of ordinary follow-up: triage by collectibility, climb a defined escalation ladder suited to the payer, hold a weekly cadence that works expiring remedies first, document every touch, and close what is genuinely closed with a signed decision. Worked that way, the bucket shrinks — and stays shrunk, because the same review shows which upstream failures are feeding it.
If your oldest bucket has stopped moving, a free medical billing audit can show how much is still recoverable and which deadlines are closest.
