For a lot of retired people, the combination of the economy and an unstable health care environment, along with complex regulations and a lot of confusion over their medicare part D coverage can leave them wondering where to go and what to do. Understanding medicare part D plans requires a whole medicare D glossary just in order to understand what's going on, and maintaining medicare part D prescription coverage can be a challenge in and of itself. Comparing and contrasting medicare part D plans is key for seniors who want to understand and take control of their medicare options. As health care regulations become complex and the health care regulatory environment becomes harder to figure out without a guide, being able to understand and compare is the key to maintaining the level of coverage that seniors require and need.