In addition to an EOB or MSN that details your Medicare health coverage, you will also receive a summary statement for your Medicare Part D plan. These statements are also called EOBs. Remember, if you have Original Medicare, you must get your Medicare Part D prescription drug coverage through a private stand-alone prescription drug plan. If you are enrolled in a Medicare Advantage Plan, your Medicare Part D prescription coverage is generally provided through your Medicare Advantage Plan. Regardless of how you get your Medicare benefits, you will get a separate EOB for each month in which you had prescriptions filled.