No. If you do nothing, your current plan will continue. However, because both your plan and your medical needs change from year to year, it is important to re-evaluate your Part D plan every year to make sure you are receiving the best coverage for your needs. By September 30, you should have received the Annual Notice of Change from your plan. That letter will explain the prescription drug benefit and formulary (the list drugs covered) being provided in 2019, as well as any changes to premiums, copayments and coinsurance the plan has made to the coverage it provided in 2018. You should review this notice to make sure your prescription drug plan still meets your needs.