the Secretary, MA plans under this part, prescription drug plans under part D, and an eligible entity with a contract under section 1893 (such as a Medicare drug integrity contractor or any successor entity to a Medicare drug integrity contractor), in accordance with subsection (j)(3) of such section, for the purpose of enabling through such portal— (i) the referral by such plans of suspicious activities of a provider of services (including a prescriber) or supplier related to fraud, waste, and abuse for initiating or assisting investigations conducted by the eligible entity