Have you ever filed a claim but received reimbursement that is less than what you expected? To you, all the details in the claim were filed perfectly. The coding, patient details, and documentation were all fine. However, after opening the Electronic Remittance Advice (ERA), you find that the payment is far lower than expected.
This happens more often than you think. While there can be many reasons for it, a frequently occurring culprit is offset in medical billing. What is it? In simple words, an offset occurs when an insurance payer reduces the payment on a current claim to recover money it believes it overpaid on a previous claim.
Rather than requesting a check for a refund, the payer simply deducts the outstanding balance from your next reimbursement. The deductions are not random. Rather, they are a built-in recovery mechanism used by Medicare, Medicaid, and commercial insurers alike.
Reasons for Offsets in Medical Billing
Now that we have explained what an offset in medical billing is, let’s discuss why it happens. Here are some root causes:
Coding Errors
Incorrect use of CPT, ICD, or place-of-service (POS) codes can result in higher reimbursements than warranted. When these discrepancies are detected by payers, they simply deduct the amount from your next claim.
Duplicate Billing
Sometimes, due to resubmission errors or glitches in the system, a claim is submitted more than once. Most of the time, the insurer rejects the duplicate claim. However, sometimes the insurance payer processes it by mistake, leading to an offset in the next claim.
Coordination of Benefits (COB) Issues
When a patient has two insurance plans/policies, payments from both plans can overlap due to COB confusion. If the payer that paid first later determines that the other payer should have paid the larger sum, or that total payments exceeded the allowed amount, an offset may be triggered.
Audit Findings
Audits are another big cause of offsets in medical billing. Medicare, Medicaid, and all commercial payers conduct routine audits. During an audit, if the documentation does not meet medical necessity standards or billing guidelines, the payer may declare a prior claim invalid and recover funds through offset.
Example of an Offset in Medical Billing
To clear any confusion, let’s look at an example of offset in medical billing.
A physician’s office submits a claim to a commercial insurer for a patient visit. The correct allowed amount is $150. However, due to a coding discrepancy, the insurer processes and pays $180, an overpayment of $30.
A few weeks later, the practice submits a new, correctly coded claim for $200 (which is also the payer’s allowed amount). Instead of paying the full $200, the insurer transfers $170 as reimbursement and notes on the ERA that $30 has been applied as an offset against the previous overpayment.
Types of Offsets in Medical Billing
All offsets in medical billing are not the same. Here are some common types that you might encounter:
Automatic Payer Offset
This is the most common type. This happens when the payer finds an overpayment and immediately starts deducting amounts from future claims until the balance is recovered. In most cases, this happens without a formal notice.
Medicare Recoupment/ Immediate Recoupment
Unlike the automatic payer offset, Medicare uses a formal process. First, it sends a demand letter to the healthcare provider. The letter outlines the amount of overpayment, the reason, and a time window to respond or repay.
If no action is taken, Medicare begins withholding from future claims automatically. In case the healthcare provider responds, it has an option to request an “immediate recoupment”. It means that the provider wants the payer to begin offsets right away rather than waiting for the next billing cycle.
Audit-Based Offset
We have already discussed this in a previous section. Triggered by a post-payment audit, this type of offset often carries higher risk. If a payer labels the original claim as invalid due to documentation issues, it may also affect future claim approvals from the same provider.
Coordination of Benefits (COB) Offset
When the order of payer liability changes after payment, the overpaying insurer applies a COB offset to recover the funds.
Eligibility Offset
Coverage changes that are applied retroactively prompt the insurer to recoup payments made during the ineligible period.
Offset Payment Process in Medical Billing
Here, we will briefly explain how the payment process works with offsets. This will help you to respond better if you are ever faced with offsets in medical billing.
- Identify the offset: Check the ERA/EOB for lower-than-expected payments, negative adjustments, or terms like “recoupment” or “takeback.”
- Gather payer details: Note the offset amount, date applied, original claim number, and the reason code.
- Find the original claim: Post the offset against the claim that caused the overpayment, not the current one, to keep accounts receivable (AR) accurate.
- Verify the overpayment: Confirm the original claim was actually overpaid before accepting the offset. Review allowed amounts, payments, and patient responsibility.
- Post the offset correctly: Record it as a payer takeback or adjustment in the ledger, and ensure the current claim’s payment is also posted properly.
- Choose a course of action:
- Accept if the overpayment was valid.
- Dispute if your records show the original payment was correct.
- Appeal with supporting documents if the payer made an error.
Challenges in Offset Management
The process we explained above is for simple cases. Oftentimes, offsets in medical billing won’t be easy to deal with. Billing teams can face many challenges while dealing with them. Here are the common hurdles faced during offset management.
- Unclear claim references: Payers often don’t identify which prior adjudicated claim resulted in the overpayment, forcing staff to manually research it and lose productive time.
- Multiple offsets in one payment: A single remittance can include several offsets across different patients and dates, making accurate posting difficult without a tracking system.
- Posting to the wrong claim: Applying an offset to the current claim instead of the original inflates AR balances.
- Patient balance confusion: When an offset hits a claim with an existing patient balance, the team must determine whether to adjust or rebill the patient portion.
Conclusion
Finally, we have reached the end of this guide. Let’s recap the essential points in case you missed anything.
- Offsets in medical billing are deductions in payment that the insurer makes when they reimburse more than the actual amount for a prior claim.
- Offsets can occur due to a variety of reasons, like coding errors, duplicate claims, audits, and COB issues.
- To resolve them, you can follow the guidelines that we provided in this guide.
However, managing offsets isn’t always easy. That’s why it is better to get professional medical billing and coding services. Many specialized companies, like NeuraBill, offer expert services that are sure to reduce the bottlenecks in your revenue cycle.
