42 C.F.R. § 423.360
(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.
Overpayment means funds that a Part D sponsor has received or retained under title XVIII of the Act to which the Part D sponsor, after applicable reconciliation, is not entitled under such title.
(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.
[79 FR 29963, May 23, 2014, as amended at 89 FR 98565, Dec. 9, 2024]