Mr. Block is currently enrolled in a Medicare Advantage plan that includes drug coverage. He found a stand-alone Medicare prescription drug plan in his area that offers better coverage than that available through his MA-PD plan and in addition, has a low premium. It won’t cost him much more and, because he has the means to do so, he wishes to enroll in the stand-alone prescription drug plan in addition to his MA-PD plan. What should you tell him?.