Key Takeaways: An AR aging report is most useful read by payer and by level of care, not as a single total. Claims get harder to collect with every bucket they move through, so the report should be worked by deadline first and value second, with the underlying causes fixed rather than just the claims.
- A stable total AR balance can hide one payer that has quietly stopped paying.
- Behavioral health AR ages differently because of large per diem claims, concurrent review, carve-outs, single case agreements, and level-of-care transitions.
- Claims past their timely filing or appeal deadline generally cannot be recovered, however valid they were.
- Many aged claims are follow-up gaps rather than billing errors: the claim was fine, but nobody chased it.
- The healthiest aging reports belong to facilities where fewer claims get old in the first place.
Every behavioral health facility has an aging report. Most look at the total and the oldest bucket, feel some concern, and move on to the next priority.
That is where aged receivables do their damage. The total hides what is actually happening, and by the time a claim reaches the oldest bucket, a lot of the options for collecting it have already closed.
Aged receivables are claims that have been billed but not yet paid, grouped by how long they have been outstanding. An AR aging report sorts them into time buckets, usually 0 to 30, 31 to 60, 61 to 90, 91 to 120, and over 120 days. The older a claim gets, the harder it is to collect, because follow-up gets harder and payer filing and appeal deadlines move closer.
Reading that report well, and working it in the right order, is one of the most direct ways to protect a facility’s cash flow.
How the AR aging buckets work
An aging report is simple in structure. Every open claim sits in one bucket based on how many days have passed since it was billed. Some systems age claims from the date of service instead, so it is worth confirming which your report uses.
| Aging bucket | What it usually means | What to do |
|---|---|---|
| 0 to 30 days | Normal processing time. Most clean claims pay here. | Monitor. Confirm claims were received. |
| 31 to 60 days | Past typical processing for many payers. Something may need attention. | Check status. Identify pends and requests for information. |
| 61 to 90 days | Likely a problem: a denial, missing information, or no response. | Work actively. Correct and resubmit, or appeal. |
| 91 to 120 days | High risk. Filing and appeal deadlines may be approaching. | Prioritize by value and deadline. |
| Over 120 days | Hardest to recover. Some claims may already be past their deadlines. | Decide quickly what is recoverable and what is not. |
The buckets matter because collectability does not stay flat. A claim in the 31 to 60 day bucket usually still has every option open. The same claim at 150 days may have missed its appeal window, and at that point no amount of follow-up will recover it.
Why behavioral health AR ages differently
AR aging behaves differently in behavioral health than in general medicine, and understanding why helps facilities read their own reports more accurately.
- Per diem stays create large, concentrated claims: A residential or PHP stay produces claims for many days of care at once. When one of those claims stalls, a large amount of money stalls with it. A single aging residential claim can outweigh dozens of outpatient claims.
- Concurrent review adds a second clock: At higher levels of care, payers review continued stays on a schedule. A missed or weak review can produce a denial for days already delivered, and those claims land in the aging report weeks after the care was provided.
- Carve-outs add routing risk: When a plan hands behavioral health to a separate organization to manage, claims sent to the wrong one get rejected or ignored. Those claims age quietly, because nobody is getting a clear denial to act on.
- Out-of-network and single case agreement claims move slower: Claims processed outside a standard network contract take longer, and claims under a single case agreement can pay at the wrong rate without anyone noticing, which leaves a balance aging on the report.
- Level-of-care transitions create authorization gaps: When a patient steps down from residential to PHP, and the authorization did not move with them, the days in between can deny and age.
Each of these produces aged receivables that look, on the report, exactly like any other old claim. The cause is different, and so is the fix.
Read the report by payer, not as a single total
The single most useful change most facilities can make is to stop reading the aging report as one number.
A total AR balance that looks stable can hide a serious problem with one payer. If most payers are paying normally and one has quietly stopped, the total barely moves, while that one payer’s claims pile up in the older buckets.
Reading the report broken out by payer shows patterns the total never will:
- One payer with a growing share of claims over 90 days, often a sign of a routing, contracting, or authorization problem specific to that payer.
- A cluster of aging claims at one level of care, which often points to a documentation or review issue at that level.
- A rise in claims over 60 days after a staffing change, a system change, or a new payer contract.
This is also where clear financial reporting earns its value. A facility that can see aging by payer and by level of care at any point in the month finds these problems early. A facility that only sees the total finds them late.
Why claims end up in the older buckets
Most aged receivables trace back to a small number of causes. Knowing which one applies tells you how to fix it.
- Missing or expired authorization: The service was delivered, but the authorization did not cover it. One of the most common causes at higher levels of care.
- Eligibility problems: The patient’s coverage changed, lapsed, or was never confirmed. Strong verification of benefits at admission prevents much of this.
- Coding or claim errors: The claim was rejected or denied for a correctable reason, and the correction never happened.
- Carve-out misrouting: The claim went to the primary medical payer instead of the organization managing behavioral health, or the reverse.
- No follow-up: The claim was submitted and never checked. Nobody noticed it was not paid.
- Accepted underpayment: The claim paid, but for less than it should have, and the difference was left as a balance or adjusted off.
The last two are worth noting because they are not really billing errors. They are follow-up gaps. The claim was fine. Nobody chased it.
How to work the aging report
Working aged receivables well is mostly a question of order. There is rarely time to work every claim at once, so the sequence decides how much gets recovered.
- Sort by deadline first: Identify claims approaching their timely filing or appeal deadline. A claim that is days from its deadline goes to the front of the line, regardless of its size, because missing that date makes it unrecoverable.
- Then sort by value: Among claims with time remaining, work the largest balances first. In behavioral health, that usually means residential and PHP per diem claims.
- Work by cause, not one at a time: When many aging claims share a cause, fixing the cause once is faster than working each claim separately. Ten claims denied for the same missing authorization often have one root issue.
- Fix the pattern as well as the claim: If the same cause keeps producing aged receivables, the claims are a symptom. The process that created them is the real problem. Our piece on preventive denial management covers how to stop that cycle.
- Decide honestly about what is not recoverable: Some claims over 120 days are past their deadlines. Spending time on them takes time away from claims that can still be saved. Recognizing which is which is part of working the report well.
Prevention is cheaper than recovery
Every claim that reaches the older buckets costs more to collect than it would have if it had paid on time. The follow-up takes longer, the corrections are harder, and some of it is lost entirely.
The facilities with the healthiest aging reports are usually not the ones working old claims the hardest. They are the ones where fewer claims get old in the first place, because eligibility is confirmed at admission, authorizations are tracked through level changes, claims go out clean, and someone checks status before a claim drifts past 60 days.
That front-end discipline is less visible than aggressive follow-up, but it is where most of the value sits. Our piece on where behavioral health revenue leaks covers the broader pattern.
Final Thoughts
Aged receivables are easy to treat as an accounting line. In practice they are a list of claims with deadlines attached, and every day a claim sits, some of its options close.
Reading the aging report by payer and by level of care, working it by deadline and then by value, and fixing the causes rather than just the claims is what separates facilities that collect steadily from those that keep finding old balances they can no longer recover.
Is your aging report growing in the older buckets? Learn about our billing and claims management, or request a revenue cycle audit to find out which claims are still recoverable before more deadlines pass. Call 866-263-3629 or email info@codemaxmb.com.
You can also speak to a specialist about your current AR.
