AR Over 90 Days? You're Probably Not Getting Paid

That accounts receivable number looks healthy until you see how much of it has been sitting there for three months or longer.

📚 Part of our reconciliation series: This article is part of The Complete Guide to Dental Practice Reconciliation, our comprehensive resource on closing your books accurately and preventing revenue leakage.

Understanding AR Aging

Accounts receivable represents money owed to your practice. It includes unpaid insurance claims, patient balances, and any other amounts where you have provided service but not yet received payment. A certain level of AR is normal and expected, representing the natural lag between service delivery and payment receipt.

AR aging breaks that total into categories based on how long each balance has been outstanding. Standard aging buckets are current (0-30 days), 31-60 days, 61-90 days, and over 90 days. Some reports further break down the over-90 category into 91-120 days and 120+ days.

The distribution across these buckets matters more than the total. An AR balance concentrated in current and 31-60 day buckets is healthy, representing recent services in normal collection cycles. An AR balance with significant amounts in 90+ day buckets represents trouble, indicating systematic collection problems.

Why 90 Days Is the Critical Threshold

The 90-day mark represents more than an arbitrary cutoff. It reflects collection realities that worsen dramatically as accounts age.

Collection probability declines sharply with time. Industry data consistently shows that claims and balances become significantly harder to collect after 90 days. What might be 90% collectible at 30 days might be only 50% collectible at 90 days and 20% collectible at 120 days. The longer you wait, the less likely you are to ever collect.

Timely filing deadlines create hard cutoffs. Many insurance plans require claim submission within 90 or 180 days of service. If claims have not been submitted or have been denied and not appealed within these windows, the opportunity to collect is permanently lost. Aged AR often includes claims approaching or past these deadlines.

Patient memory and engagement fade. A patient who received treatment three months ago may not remember details, may have moved, may have changed contact information, or may simply be less willing to pay for something that feels like distant history. Fresh balances are easier to collect than stale ones.

Staff time becomes less productive. Pursuing aged balances requires more effort for lower return. Each call, letter, or investigation takes time that could be spent on more productive activities. The opportunity cost of chasing old AR is real.

Reading Your AR Aging Report

Your PMS generates AR aging reports that categorize outstanding balances by age. Understanding how to read these reports enables appropriate action.

Look at the distribution, not just totals. A $50,000 AR balance is concerning if $30,000 is over 90 days old. The same $50,000 is healthy if $45,000 is in the current bucket.

Calculate percentages for each bucket. What percentage of your total AR is current? What percentage is 31-60 days? What percentage is 61-90? What percentage is over 90? Benchmark distributions show healthy practices keeping 70% or more in the current bucket and less than 15% over 90 days.

Compare to prior periods. Is your over-90 percentage growing? Is the absolute dollar amount increasing? Trends reveal whether problems are developing or resolving.

Segment by payer type. Insurance AR and patient AR have different characteristics and require different interventions. Seeing them combined may hide patterns that separate analysis would reveal.

Identify the largest aged accounts. A few large accounts can skew aging statistics. Understanding what those specific accounts represent often reveals actionable information.

Insurance AR Over 90 Days

Insurance accounts receivable aging past 90 days typically indicates process failures.

Claims never submitted result in aged AR that was never given a chance to be paid. Review aged insurance AR for claims that should have been submitted but were not.

Claims denied and not followed up create aged AR when the practice accepts the denial rather than investigating and appealing. Many denials are correctable, but correction requires attention that did not happen.

Claims pending with no response might indicate payer processing delays, but 90 days usually exceeds normal processing times. These claims warrant status inquiries.

Incorrect payer information creates claims sent to the wrong place. They age while the correct payer was never contacted.

Timely filing violations mean some aged AR is uncollectible regardless of effort. If the filing deadline has passed, the money is lost.

Investigate insurance AR over 90 days individually. Each aged account has a specific reason. Understanding the reasons enables both correction of individual accounts and systemic process improvement.

Patient AR Over 90 Days

Patient accounts receivable aging past 90 days presents different challenges.

Patients who forgot they owe may simply need reminder contact. Some patients genuinely lose track of bills, especially when statements are infrequent or unclear.

Patients who cannot pay require payment arrangements, financial assistance decisions, or write-off consideration. Extended aging suggests current efforts are not reaching resolution.

Patients who refuse to pay need escalation to collections or write-off. Continued internal pursuit after 90 days often produces diminishing returns.

Patients with incorrect contact information cannot be reached for collection. Address and phone updates are needed.

Patients who dispute charges need dispute resolution. Unresolved disputes age while nothing is collected.

The appropriate response to aged patient AR varies by situation. Some accounts need more aggressive pursuit. Others need payment arrangements. Others need write-off. Knowing which is which requires account-level review.

The True Cost of Aged AR

Aged AR costs your practice beyond the direct uncollected amounts.

Collection probability loss means you will not recover 100% of aged AR. If you have $20,000 over 90 days and collect only 40%, you have lost $12,000 that proper earlier attention might have captured.

Opportunity cost of staff time spent pursuing aged accounts is real. That time could generate more value pursuing fresher accounts or other productive work.

Cash flow impact affects practice operations. Money sitting in AR is not available for payroll, supplies, equipment, or owner compensation. Extended AR ties up capital.

Emotional burden affects staff morale. Working on accounts that feel hopeless is demoralizing. High aged AR creates a perpetual backlog that never seems to resolve.

Indicator of systemic problems is perhaps most significant. Aged AR does not happen randomly. It reflects process gaps, staff capacity issues, or management attention problems that affect the entire revenue cycle.

Taking Action on Aged AR

Addressing aged AR requires both immediate attention to existing aged accounts and process changes to prevent future accumulation.

Segment your aged AR by collectibility. Some accounts might still be recoverable with focused effort. Others are effectively uncollectible and should be written off. Honest assessment enables appropriate resource allocation.

Assign responsibility for aged account pursuit. Whether to existing staff with dedicated time blocks or to a focused role, someone needs to own working down the backlog. Unassigned responsibility produces no results.

Set collection targets. How much do you expect to collect from currently aged AR? How quickly should the over-90 balance decline? Goals focus effort and enable progress measurement.

Implement systematic follow-up protocols. What happens on day 31? Day 61? Day 91? Defined processes ensure accounts receive appropriate attention at each stage rather than aging unnoticed.

Consider outside help for the worst accounts. Collections agencies or AR recovery services can sometimes collect accounts that internal efforts cannot. The cost of their fees may be worth it for accounts that would otherwise be written off entirely.

Preventing Future Aged AR

Cleaning up existing aged AR solves today's problem. Preventing future accumulation solves it permanently.

Improve front-end processes. Better insurance verification, cleaner claim submission, and collection at time of service prevent many AR problems from developing.

Shorten follow-up cycles. Do not wait for accounts to age before acting. Pursue unpaid claims after two weeks, not two months. Send patient statements immediately after insurance processes, not after waiting thirty days.

Monitor AR aging weekly. Regular review catches accounts as they begin to age rather than after they have passed critical thresholds.

Address root causes. If specific payers consistently create aged AR, the problem might be credentialing, claim formatting, or payer-specific processes. If specific procedure types age, billing accuracy might be the issue. Patterns reveal systemic causes.

Set AR aging as a key metric. When AR aging is a metric that leadership monitors and staff are accountable for, behavior changes. What gets measured and managed improves.

Healthy practices maintain AR aging distributions that reflect normal collection cycles, not accumulated collection failures. Moving from problematic aging to healthy aging requires acknowledging the problem, taking corrective action, and building processes that prevent recurrence.

Zeldent flags discrepancies early in the collection cycle, before accounts have time to age into uncollectibility. Our automated matching identifies missing payments and posting errors within days rather than months. Schedule a demo to see how Zeldent helps prevent aged AR.