42 C.F.R. § 423.325

(a) General PDE submission timeliness requirements. Unless paragraph (b) of this section applies, a Part D sponsor must submit PDE records to CMS as follows:

(1) Initial PDE records within 30 calendar days from the date the Part D sponsor (or its contracted first tier, downstream, or related entity) receives the claim.

(2) Adjustment or deletion PDE records within 90 calendar days of the Part D sponsor (or its contracted first tier, downstream, or related entity) discovering or receiving notification of an issue that requires a change to the previously submitted PDE record.

(3) A PDE record for a paid claim transaction associated with a PDE record that was previously rejected by CMS at least once every 90 calendar days from receipt of a rejection until the PDE record is accepted unless the claim associated with the rejected PDE record is reversed or deleted, or the PDE record that was rejected is otherwise found to have been submitted in error.

(b) Selected Drugs PDE submission timeliness requirement. A Part D sponsor must submit initial PDE records for selected drugs (as described at section 1192(c) of the Act) within 7 calendar days from the date the Part D sponsor (or its contracted first tier, downstream, or related entity) receives the claim.