(a) This subpart sets forth the requirements relating to the following:(1) Part D plan sponsors with respect to grievances, coverage determinations, and redeterminations.(2) Part D IRE with respect to reconsiderations.(3) Part D enrollees' rights with respect to grievances, coverage determinations, redeterminations, and reconsiderations.(4) Review of at-risk determinations made under a drug management program in accordance with § 423.153(f) .(b) The requirements regarding reopenings, ALJ hearings and ALJ and attorney adjudicator decisions, Council review, and judicial review are set forth in subpart U of this chapter. 74 FR 65363 , Dec. 9, 2009, as amended at 82 FR 5125 , Jan. 17, 2017; 83 FR 16750 , Apr. 16, 2018 As amended at 82 FR 5125, 1/17/2017; as amended at 82 FR 5125, 1/17/2017; 83 FR 16750, 6/15/2018