Having been added in 2006, Medicare Part D can be termed as the most recent addition to Medicare plan. Mainly it covers prescription drugs for outpatients. The plan seems to be confusing to many people. While it is important you evaluate and compare options before making a choice, one standard feature of part D is that beneficiaries’ satisfaction has remained high. According to studies and surveys carried out by various bodies, more than 90 percent of the people enrolled are satisfied with Medicare part D.