The 60-Day Overpayment Rule: How to Handle Credit Balances Without False Claims Risk
A Medicare overpayment you sit on can become a False Claims Act problem. Here is how the 60-day rule works, the 2025 update that gives you time to investigate, and how to manage credit balances cleanly.
A credit balance sitting on a Medicare account isn't just an accounting nuisance — it's a ticking compliance clock. Under the 60-day rule, an overpayment you keep can turn into False Claims Act exposure. The good news: a 2025 update finally gives you room to investigate before the clock forces your hand.
The 60-day rule
Medicare Part A and B providers must report and return an overpayment within 60 days of identifying it (or by the due date of a corresponding cost report, whichever is later). Miss it and you risk penalties, program exclusion, and False Claims Act liability. This is one compliance deadline you don't want to test.
What "identified" really means
You've identified an overpayment when you have — or through reasonable diligence should have — determined you received one and quantified it. That "should have" is the trap: ignoring obvious credit balances doesn't stop the clock. The lookback period is six years.
You can't un-know an overpayment by not looking. Reasonable diligence is the standard, and the clock starts whether you check or not.
The 2025 investigation window
The helpful change: under a CMS rule effective January 1, 2025, once you start a timely, good-faith investigation, the 60-day deadline is suspended until the investigation concludes or up to 180 days after identification. In practice, that's up to 180 days to investigate plus 60 to return — real breathing room to get the amount right instead of guessing.
Managing credit balances the right way
- Run a credit-balance report on a regular, documented cadence.
- Investigate the cause — duplicate payment, COB error, or contractual overpayment.
- Return via claim adjustment, credit-balance report, or self-reported refund.
- Document the investigation timeline to preserve the good-faith window.
- Never let confirmed Medicare/Medicaid credit balances simply age.
Clean credit-balance management is part of a well-run revenue cycle — and it's exactly the kind of exposure a thorough billing audit surfaces before a payer does.
Sitting on unresolved credit balances?
We'll help you find and manage them — free.
The bottom line
The 60-day rule turns unresolved credit balances into legal risk — but the 2025 investigation window rewards providers who act in good faith. Report credit balances routinely, investigate promptly, document the timeline, and return what you owe. Start with a free billing audit.
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Frequently asked questions
Medicare Part A and B providers must report and return an identified overpayment by the later of 60 days after it was identified or the due date of any corresponding cost report. Failing to do so can create False Claims Act liability.
You have identified an overpayment when you have, or through reasonable diligence should have, determined that you received one and quantified the amount. Willful ignorance does not stop the clock.
The lookback period is six years. Overpayments identified within six years of receipt must be reported and returned.
Yes. A CMS rule effective January 1, 2025 provides that when a provider begins a timely, good-faith investigation, the 60-day clock is suspended until the investigation concludes or up to 180 days after identification — giving up to 180 days to investigate plus 60 to return.
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