What must a provider do under Section 6402 of the ACA upon identifying an overpayment?

Under Section 6402 of the Affordable Care Act (ACA), when a provider identifies an overpayment, the provider is required to refund Medicare within 60 days. This provision is part of the efforts to ensure that overpayments are addressed promptly and that the integrity of the Medicare program is maintained. The 60-day window for returning overpayments serves as a clear directive for providers to act quickly, ensuring that Medicare funds are accurately accounted for and administrative errors or fraudulent activities are mitigated.

While other actions, such as notifying the patient or conducting an internal audit, may be considered best practices or required under different circumstances, the specific legal obligation under Section 6402 is to refund the overpayment to Medicare within the designated timeframe, hence making it the correct response to this question.