5 Common A/R Follow-Up Problems and How to Fix Them

Your billing team has contacted the payer twice, but the claim remains unpaid. The account note says “pending,” and nobody knows whether the next step is a correction, medical records, or an appeal.

For practice managers and revenue cycle leaders, that is the problem to solve. Follow-up activity matters only when it moves an account toward an accurate payment or a documented resolution.

A/R follow-up means investigating and resolving outstanding insurance and patient balances after billing. Denial management is part of that work, but unpaid claims also include processing delays, rejected submissions, underpayments, and posting errors.

The five problems are incorrect claim routing, missed deadlines, unclear ownership, unverified payment differences, and inaccurate patient balances. The steps below explain how to recognize and resolve each one.

Where Your A/R Follow-Up Process Breaks Down and How to Fix It

1. Treating Every Unpaid Claim Like a Denial

An unpaid claim does not automatically need an appeal. It may have failed submission edits, be awaiting processing, or require additional information. Choosing the wrong response can leave the original problem unresolved.

Start by checking claim acceptance, current payer status, and any remittance information. First Coast, a Medicare Administrative Contractor, instructs providers to retrieve and review electronic acknowledgment reports after submission to identify errors requiring correction. Acceptance for processing is different from approval for payment.

Use the status to determine the next action:

CMS explains that minor claim errors and omissions are not handled through Medicare’s redetermination process. This distinction helps your team choose the appropriate route. When an appeal is required, explain the disagreement, include supporting evidence, and retain submission confirmation.

Once the account is resolved, share recurring causes with registration, coding, or clinical staff. Repeated eligibility errors need a front-end fix as well as claim-by-claim follow-up.

2. Working Aging Buckets Without Protecting Deadlines

An aging report shows how long balances have remained open. It does not tell your team which account will lose its filing or appeal opportunity first.

A newer claim approaching a deadline may require attention before an older claim that still has a valid recovery path. Prioritize using the applicable deadline, expected collectible amount, current blocker, and action available.

For Original Medicare, claims generally must reach the correct contractor within one calendar year after the date of service, subject to limited exceptions. CMS states that a late-filing denial is not an initial determination and is not subject to appeal. First-level redetermination generally has a separate deadline of 120 days from receipt of the initial determination.

Build a deadline record that includes:

• Initial filing and applicable correction deadlines.
• Appeal deadline and the event that starts the clock.
• Documentation response deadline.
• Submission confirmation and supporting evidence.
• Assigned employee and next review date.

Commercial insurance, Medicaid, and Medicare Advantage requirements must be checked separately. A universal “follow up after 30 days” rule cannot replace payer-specific requirements.

For Medicare documentation requests, also follow the relevant contractor’s instructions. Noridian’s DME guidance explains that an Additional Documentation Request is a pending request, not a denial, and warns against duplicate claims while the response is pending.

3. Recording Calls Without Assigning the Next Action

“Called payer” describes an activity. It does not explain what another employee should do when they reopen the account.

Without usable notes and ownership, staff may repeat inquiries, overlook requested information, or leave an account untouched after a promised review date.

Check the available electronic status or payer portal first. CMS supports contractor portals, interactive voice response, and electronic claim-status requests and responses. Use direct contact when the available information does not explain the blocker or the next step.

After each meaningful interaction, record:

• Claim identifier and confirmed status.
• Reason payment remains outstanding.
• Payer reference number or saved response.
• Required action and responsible employee.
• Submission deadline and next follow-up date.

Illustrative note: “Payer confirms records are required. Reference number saved. Documentation specialist will submit the requested signed notes by October 12. Review receipt confirmation on October 14.”

The dates are an example, not a recommended payer turnaround.

Escalate when a stated review date passes without progress. Give the escalation owner the claim history, evidence already submitted, and the specific unresolved issue. 

This makes follow-up easier to continue across staff changes. Keep the account open until you verify the outcome: records received, correction processed, appeal decided, or payment accurately posted. A promise to reprocess is a reason to schedule another check, not evidence of payment.

4. Accepting Underpayments or Writing Off Unverified Balances

A partial payment does not establish that the payer paid incorrectly. The difference could reflect contractual adjustments, patient responsibility, a valid reduction, or a payment error.

Compare the actual payment with the applicable contract, fee schedule, and remittance explanation, not the original charge alone. CMS explains that adjustment group codes assign financial responsibility, while reason and remark codes explain payment adjustments.

Illustrative example: A practice bills $200. For this simplified example, the contract and benefit calculation establish an allowed amount of $120: $96 payable by insurance and $24 in valid patient responsibility. The remaining $80 is a contractual adjustment, not an $80 insurer underpayment.

If the insurer pays $86 instead of $96, investigate the $10 difference against the applicable terms and remittance. Retain the basis for any dispute. Also reconcile the payment record with funds received; an unmatched payment should go to payment posting for investigation before another collection request.

Before approving a write-off, verify:

• Payments and adjustments were posted correctly.
• Any applicable secondary billing was addressed.
• Available correction or appeal options were considered.
• The reason and approval follow the practice’s policy.

Track contractual adjustments separately from denial-related losses and other write-offs. Legitimate adjustments belong in accurate accounting; unexplained adjustments deserve investigation.

5. Following Up With Patients Before Validating Their Responsibility

Adding a payment link cannot fix an incorrect bill. Before requesting payment, confirm that insurance payments, secondary coverage, contractual adjustments, and patient payments have been accounted for.

CMS requires providers to identify other coverage and determine when Medicare is the primary or secondary payer. An unresolved coordination-of-benefits issue needs investigation before transferring an assumed balance to the patient.

Check billing protections as well. Federal law prohibits billing Qualified Medicare Beneficiaries for Medicare Part A and Part B cost-sharing on covered services.

For a verified, billable patient balance:

• Explain the service date, payments, adjustments, and amount due.
• Provide a clear way to question the bill or update insurance.
• Offer practical payment methods.
• Explain payment plans and financial assistance where available.
• Follow documented policies and applicable communication requirements.

HFMA’s patient billing guidance emphasizes understandable, accurate statements and clear financial communication. Its account-resolution guidance also addresses financial assistance and payment options.

The first task is to establish what the patient legitimately owes. Then make resolving that balance understandable and manageable.

Check Whether Follow-Up Is Producing Results

Review aging by payer alongside unresolved deadlines, stalled accounts, recovered payments, and write-off reasons. HFMA’s MAP Keys define measures for A/R aging, remittance denials, and denial write-offs. Use consistent definitions when comparing periods. For HFMA’s billed A/R aging measure, age physician and ambulatory accounts from the date of service and inpatient accounts from discharge; resubmitting a claim should not restart that measure.

As a practical weekly review, ask:

• Which accounts have an upcoming deadline and no completed action?
• Which scheduled follow-ups are overdue?
• Which payer promises still lack a verified outcome?
• Which balances need payment reconciliation rather than collection?
• Which repeated causes need correction by registration, coding, or clinical staff?

These are recommended management checks, not mandatory reporting intervals.

Do not judge performance by call volume or a lower A/R total alone. A falling balance could reflect cash received, legitimate adjustments, or avoidable losses. Ask what changed and why.

Get Help With the Accounts Holding Up Your Cash Flow

CapMinds’ medical billing services cover claims follow-up, denial management, payment posting, and aged A/R support. If your team is struggling with unresolved accounts, start by discussing where the workflow stalls and which balances need attention.

Let’s Discuss Your A/R Challenges