Part D is a program offered by Private Insurance Carriers that provide Prescription Drug coverage for those enrolled in Medicare. Participants pay a monthly premium, and in exchange, they can access prescription Medications. The specific cost-sharing amounts – such as deductibles, copays, and coinsurance rates – vary depending on the plan and Tier Level of the Medication, but the government sets a standard baseline for these elements. There are many different choices and your Nassau County Broker will help you choose the most appropriate plan for you.