Medicare Part D Plans 2024 Aarp. Also known as medicare part d. Part d (medicare drug coverage) helps cover cost of prescription drugs, may lower your costs and protect against higher costs.

 — you can switch part d plans as much as once per calendar quarter during the first three quarters of the year.  — part d plans can charge a deductible of up to $545 in 2024, although many plans don’t charge deductibles.