Pursuant to 42 C.F.R. 423.888, there are multiple scenarios during the Payment Validation process that can delay or stop a payment request from being processed. Furthermore, payments that remain on hold for 60 days and are not resolved by the Plan Sponsor are subject to cancellation by the RDS Center.
For a list of common reasons that a payment request may be placed on hold and what the Plan Sponsor should do to resolve the issue, refer to Payment Requests Placed on Hold.