Medicare offers prescription drug coverage to everyone with Medicare. If you decide not to get Medicare drug coverage when you're first eligible, you'll likely pay a late enrollment penalty. Medicare Prescription Drug Plan (Part D). These plans (sometimes called "PDPs") add drug coverage to Original Medicare.
Before you make a decision, learn how Part D works with your other drug coverage. For example, you may have drug coverage from an employer or union, TRICARE, the Department of Veterans Affairs (VA), the Indian Health Service, or a Medicare Supplement Insurance (Medigap) policy. Compare your current coverage to Medicare drug coverage. The drug coverage you already have may change because of Medicare drug coverage, so consider all your coverage options.
If you have (or are eligible for) other types of drug coverage, read all the materials you get from your insurer or plan provider. Talk to your benefits administrator, agent, insurer, or plan provider before you make any changes to your current coverage.