The best Part D plan will depend on the medications you are currently taking. Since each Part D insurance company's formulary (list of drugs covered) is different, there is no one "best" plan for everyone. There is a "best" plan for you, but you would need to speak with someone who can research the plan that covers all your medications and your preferred pharmacy.
An additional note, each year formularies change. So each year you need to review your Part D plan as well as your medicare supplement plan. A good broker will help you with both.
An additional note, each year formularies change. So each year you need to review your Part D plan as well as your medicare supplement plan. A good broker will help you with both.