How to Follow Up on Unpaid Claims

Introduction

For modern US medical practices, managing the revenue cycle requires rigorous administrative oversight to prevent delayed payments from disrupting cash flow and consuming hours meant for patient care. Hard-earned revenue frequently sits in insurance limbo, making a structured approach to aging accounts receivable (AR) vital. Consistent follow-up on unpaid claims ensures that practices recover legitimate reimbursements before strict, timely filing windows close permanently.

The Financial Impact of Neglected Claims

Leaving unpaid claims unaddressed does more than create an untidy AR report; it directly erodes your bottom line. Insurance payers operate on strict timelines, and if your team isn’t actively tracking outstanding balances, you risk losing that revenue entirely. Most major commercial payers and government programs have strict, timely filing limits, often ranging from 90 to 180 days from the date of service. 

If your unpaid claims follow-up protocol takes longer than this window to identify and correct a problem, the payer will issue a permanent denial. At that stage, you cannot legally bill the patient for the balance, forcing your practice to write off the loss. Days in Accounts Receivable (the average number of days it takes to collect payments) is a vital metric for any practice. A high days-in-AR number means your capital is trapped in the insurance network rather than funding your payroll, medical supplies, or expansion. Effective follow-up keeps this metric low, ensuring steady, predictable cash flow.

Setting Up an Efficient Follow-Up Workflow

You cannot fix what you do not track. Managing outstanding claims requires a structured, repeatable workflow rather than an occasional, reactive glance at your billing software.

Categorizing Your Aging AR Buckets

Your billing team should segment outstanding claims into standard 30-day buckets:

• 31–60 days: Your primary target for routine follow-up. Catching issues here prevents them from snowballing.
• 61–90 days: Requires urgent attention, as you are quickly approaching timely filing limits for several payers.
• 91–120 days and over 120 days: High-risk zones requiring aggressive recovery or formal appeals.

Prioritizing Claims by Value and Age

When tackling a large AR report, blindly working from the top down is inefficient. Instead, use a high-yield prioritization strategy:

1. High-dollar, near-deadline: Focus on large claims approaching their timely filing limits.

2. Payer grouping: Batch your calls or portal searches by specific payers (e.g., all UnitedHealthcare claims at once) to maximize your billing team’s time.

Step-by-Step Guide to Processing Unpaid Claims

When a claim passes the 30-day mark without an Electronic Remittance Advice (ERA) or Explanation of Benefits (EOB), it is time to initiate active intervention. Follow this tactical sequence to resolve the issue.

1. Verify Claim Status via Payer Portals: Before picking up the phone, log into the specific clearinghouse or payer portal (like Availity). Check if the claim is logged as “received,” “pending,” “suspended,” or if it was rejected upfront at the clearinghouse level before even reaching the payer’s adjudication system.
2. Identify the Root Cause of Non-Payment: If the claim is present but unpaid, locate the adjustment reason codes. Determine if the delay is due to a request for medical records, an unresolved Coordination of Benefits (COB) issue on the patient’s end, or an internal processing error by the insurance company.
3. Gather Necessary Documentation: Before contacting the payer, assemble the original claim details: the member ID, date of service, total charges, NPI numbers, and any prior reference numbers or ERA codes associated with the patient’s file.
4. Contact Payer Representatives or File Appeals: If the portal does not offer a clear path to resolution, call the provider’s customer service line. If the claim was wrongfully processed, request a re-adjudication over the phone. If a formal denial occurred, immediately draft and submit a targeted appeal with the necessary clinical documentation.
5. Document Every Interaction Logically: Note the date, time, name of the insurance representative, call reference number, and the specific resolution promised. This documentation is your safety net if the claim is lost or misprocessed a second time.

Common Roadblocks in the Follow-Up Process

Even the most seasoned billing teams run into systemic delays. Recognizing these common obstacles allows you to pivot your strategy quickly.

• Deciphering Vague Payer Rejections: Payers frequently use generic remark codes that hide the true nature of a claim issue. For instance, a rejection stating “missing information” could refer to anything from a missing modifier to an incorrect prior authorization number. Your team must look past the surface code, cross-reference the payer’s specific provider manual, or call the rep directly to identify the exact field error.
• Managing Payer Processing Delays and Backlogs: Sometimes, the issue isn’t your claim—it’s the payer. Insurance companies frequently experience internal system migrations, backlogs, or staffing shortages that stall adjudication. When you identify a systemic pattern of delays from a specific insurance carrier, escalate the issue to your Provider Relations Representative rather than calling on individual claims one by one.
• Coordination of Benefits (COB) Stalls: Claims often stall when a payer requests updated secondary insurance information from the patient. Because patients frequently ignore letters from insurance companies, the claim remains suspended indefinitely until the practice intervenes and contacts the patient directly to resolve the coverage hierarchy.
• Lost Documentation and Missing Attachments: Payers regularly claim they never received required attachments, such as clinical notes, operative reports, or primary EOBs. Even when these items are sent with the initial electronic claim submission, clearinghouse drops or internal payer routing errors can separate the documentation from the claim form.

Best Practices to Prevent Future Unpaid Claims 

An excellent follow-up strategy is essential, but minimizing the number of claims that require follow-up in the first place is the ultimate goal. Clean claim rates should ideally sit above 95%.

• Streamlining Front-Desk Eligibility Verification: The vast majority of unpaid claims stem from front-office errors. Verifying patient eligibility, coverage active dates, copays, and deductibles before the patient sees the provider eliminates demographic rejections at the source. Implement a mandatory policy to re-verify insurance at every single visit.
• Regular Billing Code Audits and Staff Training: Coding regulations and payer policies shift constantly. Regular internal audits of your documentation, ICD-10 coding, and CPT modifiers prevent denials related to medical necessity or unbundling. Ensure your billing team participates in ongoing education regarding updated payer rules and credentialing changes.
• Utilizing Claim Scrubber Software: Implement or update automated claim scrubbing technology within your electronic health record (EHR) or billing system. These tools check claims against thousands of coding rules and payer-specific regulations to catch missing modifiers, incorrect formatting, or invalid codes before the claim ever leaves your practice.
• Establishing a Clear Prior Authorization Protocol: Create a dedicated workflow to identify and secure required prior authorizations well before a patient’s scheduled appointment. Failing to match a claim with its corresponding authorization number is a leading cause of immediate, hard-to-overturn denials that heavily drain administrative follow-up resources.

About PrimeCare MBS 

PrimeCare MBS is here to lift that burden. We act as a seamless extension of your independent practice, taking over your entire revenue cycle. Our dedicated accounts receivable team aggressively tracks your aging reports, targets unpaid claims before timely filing deadlines expire, and handles complex payer disputes so you can focus entirely on delivering exceptional patient care. To know more about our medical billing services, call us at (407) 413 9101 or email us at sales@PrimeCareMedicalBilling.com

Disclaimer: This article is intended for informational and promotional purposes only. It should not be considered professional or expert advice. Readers are advised to use discretion and verify details before implementing any information.

To conclude,

Managing outstanding insurance balances requires consistency, clinical accuracy, and proactive workflows. By building a dedicated system, you can recapture leaking revenue and protect your practice’s financial independence.

• Act Within 30 Days: Begin your unpaid claims follow-up as soon as a claim hits day 30 without a response to prevent hitting the timely filing cliffs.
• Leverage Tech First: Use payer portals and clearinghouse data to diagnose rejections before spending time on phone queues.
• Automate and Scrub Upstream: Embed robust claim-scrubbing software and strict prior authorization checkpoints directly into your scheduling workflow to stop billing errors before they happen.
• Address Root Causes Continuously: Aggregate weekly denial data to discover exactly why claims are stalling, allowing you to target train front-desk staff on insurance eligibility and documentation requirements.

Frequently Asked Questions (FAQs)

Q1. How often should a clinic run an aging AR report?

A1: Ideally, your billing team should pull and analyze aging AR reports weekly. This ensures that claims crossing into the 31–60 days window are addressed immediately, keeping your overall days-in-AR low.

Q2. What is the difference between a claim rejection and a claim denial?

A2: A claim rejection occurs at the clearinghouse or payer entry level due to data errors (like a misspelled name or invalid NPI). It never enters the adjudication system and can be fixed and re-sent immediately. A claim denial occurs after the payer processes the claim and finds a policy issue (like a lack of medical necessity or missing prior authorization), requiring a formal appeal.

Q3. How long should we wait before calling an insurance provider about a claim?

A3: For electronic claims, wait 21 to 30 days before initiating active follow-up if no ERA or status update has been posted. For paper claims, allow up to 45 days for manual data entry on the payer’s end.

Q4. Can we appeal a claim that was denied for timely filing?

A4: Yes, but only if you can prove the claim was originally sent within the filing window. You must submit your clearinghouse acceptance report (999 or 277 reports) showing successful transmission and payer acceptance before the deadline.

Q5. How do you track AR performance and resolve recurring payer issues?

A5: To track AR performance and resolve recurring payer issues, you must monitor key metrics like Days in A/R and denial rates to catch bottlenecks, while aggregating denial data by root cause to fix front-end errors and escalate systemic glitches directly to dedicated payer representatives.