42 CFR § 423.360 - Reporting and returning of overpayments.
(a) Definitions. For the purposes of this section the following definitions are applicable:
Applicable reconciliation means the later of either the annual deadline for submitting -
(ii) Direct and indirect remuneration data.
Funds for purposes of this section, means any payment that a Part D sponsor has received that is based on data submitted by the Part D sponsor to CMS for payment purposes, including data submitted under § 423.329(b)(3), § 423.336(c)(1), § 423.343, and data provided for purposes of supporting allowable costs as defined in § 423.308 which includes data submitted to CMS regarding direct or indirect remuneration.
(c) Identified overpayment. The Part D sponsor has identified an overpayment when the Part D sponsor has determined, or should have determined through the exercise of reasonable diligence, that the Part D sponsor has received an overpayment.
(d) Reporting and returning of an overpayment. A Part D sponsor must report and return any overpayment it received no later than 60 days after the date on which it identified it received an overpayment.