420.303—HHS criteria for requesting books, documents, and records.
HHS will generally request books, documents, and records from a subcontractor only if one of the following situations exists and the question cannot satisfactorily and efficiently be resolved without access to the books, documents, and records:
(a)
HHS has reason to believe that the costs claimed for services of the subcontractor are excessive or inappropriate.
(c)
There is a written accusation with suitable evidence against the provider or subcontractor of kickbacks, bribes, rebates, or other illegal activities.