Stop Writing Off Aged Claims: The $50K Hiding in Your Practice’s Aging Report

Pull your practice’s A/R aging report right now. Look at the 90+ day column. That number, the one most practice managers scroll past, is unfinished revenue. The average mid-size medical practice has $40,000 to $120,000 sitting there, and most of it will be quietly written off as uncollectible in the next 90 days.

The conventional wisdom is that aged claims are dead money. The conventional wisdom is wrong. Most aged A/R is recoverable. The reason it doesn’t get recovered is that the work required is fundamentally different from regular claim submission, and most billing teams aren’t structured to do both.

Here’s what’s actually in your aging report, why it gets written off, and the playbook for recovering what’s already yours.

The 90-day cliff

Every aging report has an inflection point. Claims under 30 days get worked. Claims at 60 days get a follow-up call. By 90 days, attention drops sharply. By 120, most practices have moved on. By 180, the claim is functionally written off even if it’s still on the books.

This pattern isn’t because aged claims become unrecoverable. It’s because the work changes. A claim under 30 days needs submission and tracking. A claim over 90 days needs:

• A determination of why it’s stuck (denied, lost, underpaid, pending appeal).
• Targeted action: appeal, resubmit with corrections, escalate, or formal collections.
• Specific knowledge of the payer’s appeal process and timely-appeal windows.
• Time-sensitive coordination with payer reps, often by phone.
• Documentation that anticipates the payer’s likely objections.

That’s recovery work, not billing work. They’re related but require different skills, different time discipline, and different expectations.

Why most practices write off aged claims

Talk to the biller at any small or mid-size practice and you’ll hear the same explanations:

• “I don’t have time. New claims have to go out today.”
• “I called the payer three times and got nowhere.”
• “The reason code is too vague to fix.”
• “Our software flagged it as uncollectible.”
• “Our practice manager said to write off everything over 120 days.”

Each is partially true. None justifies the write-off. The aged-claim work doesn’t fit into a normal billing day. It needs its own time, its own process, and often its own person.

What’s actually in your aging report

When you actually pull EOBs and categorize the 90+ A/R, you find a mix:

• Lost claims. The payer never received it, or lost it after submission. Easy fix: resubmit with proof of original submission and a timely-filing override request.
• Denial-no-action. The claim was denied but never worked. The reason code is often fixable: missing documentation, wrong modifier, incorrect units.
• Pending appeals. An appeal was filed but the response is overdue. Needs an escalation call or peer-to-peer review request.
• Underpaid claims. The claim was paid, but at less than the contracted fee. Recoverable through a contractual appeal with the fee schedule attached.
• Patient responsibility never billed. Insurance paid, but the patient balance wasn’t sent promptly. Now it’s a soft collections situation.
• Eligibility issues. The patient’s coverage was retroactively terminated. Sometimes recoverable if the patient was active on the date of service.
• Coding errors. The claim was denied for coding and never re-coded.
• True bad debt. A small minority is genuinely unrecoverable.

The mix varies by practice. Most practices, when they categorize their 90+ A/R, find that 60 to 80 percent is recoverable.

The recovery playbook

Aged A/R recovery follows a structured process. Anything else is wishful thinking.

1. Categorize and prioritize. Sort the aging report by claim value, then by payer, then by category. Work the highest-dollar fixable claims first.
2. Pull the EOB. Read the actual reason codes (CARC and RARC). Don’t trust the software’s summary; the real reason matters.
3. Decide the action path. Resubmit, appeal, escalate, or write off as a categorized decision (not a default).
4. Execute within the window. File the appeal with the right format, supporting documentation, and within the payer’s timely-appeal deadline. Most commercial payers allow 90 to 180 days from the EOB; Medicare allows 120; Medicaid varies.
5. Follow up systematically. Every action gets a follow-up date. No claim sits without a documented next step.
6. Track outcomes. Measure recovery rate by reason code so you can prevent the same problem upstream.

This isn’t glamorous. It’s spreadsheet work, phone work, and document work. It’s the difference between practices that collect what they earn and ones that don’t.

The math: what recovery actually looks like

For a typical mid-size practice with $80,000 in 90+ A/R:

• 60 to 80 percent is potentially recoverable based on industry data.
• A focused recovery effort recovers 30 to 50 percent of the recoverable portion within 90 days.
• Best-in-class teams recover 70 to 85 percent over 6 months.

That’s $24,000 to $56,000 in revenue from work the practice has already done. And it compounds. A practice that runs an ongoing recovery program reduces its 90+ aging quarter over quarter. A practice that doesn’t accumulates more uncollected revenue every cycle.

What separates a recovery partner from a billing service

Most billing services say they “do A/R follow-up.” Few have a dedicated recovery program. The difference:

• A billing service follows up on outstanding claims as part of normal operations, often when there’s time.
• A recovery program treats aged claims as their own discipline, with their own team time, their own metrics, and their own playbook.

When evaluating a billing partner, ask:

• What’s your recovery rate on claims aged over 90 days?
• Do you have dedicated staff for recovery, or is it a side task?
• Can you show me the action log on a sample of recovered claims?
• What categories of aged claims do you focus on first?
• How do you handle formal appeals, including the appeal letter writing?

Vague answers usually mean it’s not really happening.

A 90-minute self-audit you can run on Monday

If you’ve never run a focused review of your aged A/R, do this:

1. Pull your aging report.
2. Total the dollars in 90+, 120+, and 180+ buckets.
3. Sort the top 20 highest-dollar claims and pull the EOBs.
4. Categorize each (lost, denied, underpaid, pending appeal, eligibility, coding error, bad debt).
5. Count how many would be recoverable with focused work.

The dollars are real. The answer almost always surprises practice owners.

The bottom line

Aged A/R isn’t dead money. It’s recoverable revenue that requires specialized work most billing operations aren’t set up to do. Practices that build (or outsource to) a dedicated recovery function regularly add 5 to 10 percent to net collections without adding a single new patient.

The choice isn’t whether to chase aged claims. It’s whether to keep writing them off, or to recover what’s already yours. If you’d like a benchmark on what’s recoverable in your practice, a free A/R audit reviews your 90+ aging by category and quantifies the recoverable revenue. The exercise takes 30 minutes and gives you actionable numbers.