What Is Medicare Part D?
Medicare Part D is prescription drug coverage offered through private insurance companies approved by Medicare. It helps pay for brand-name and generic prescription drugs at participating pharmacies.
Part D is available as a standalone plan that works alongside Original Medicare, or it may be included as part of a Medicare Advantage plan. Even if you currently take few or no medications, enrolling when first eligible is important — going without coverage for more than 63 days can result in a permanent premium penalty.
How Part D Plans Work
Each Part D plan has a formulary — a list of covered drugs organized into tiers. Your cost depends on which tier your medication falls into, your plan's deductible, and which pharmacy you use.
| Tier | Drug Type | Typical Cost |
|---|---|---|
| Tier 1 | Preferred generic drugs | Lowest copay ($0–$5) |
| Tier 2 | Non-preferred generics | Low copay ($5–$15) |
| Tier 3 | Preferred brand-name drugs | Moderate copay ($30–$50) |
| Tier 4 | Non-preferred brand-name drugs | Higher copay ($60–$100) |
| Tier 5 | Specialty drugs | Highest cost (25–33% coinsurance) |
Tier costs vary by plan. We run a drug-by-drug cost comparison before you enroll so you know your exact expected costs.
Part D Enrollment Periods
You can enroll in, switch, or drop Medicare Part D coverage only during specific windows each year.
Initial Enrollment Period
The best time to enroll. Starts 3 months before your birthday month and ends 3 months after. Enrolling on time protects you from the late enrollment penalty.
Annual Enrollment Period
The most common time to change Part D plans. You can switch, join, or drop a standalone Part D plan. Changes take effect January 1. Review your plan every fall — formularies and premiums change annually.
Special Enrollment Period
You may qualify for a Special Enrollment Period if you lose other creditable drug coverage, move out of your plan's service area, or experience other qualifying life events.
Late Enrollment Penalty Warning
If you go more than 63 consecutive days without creditable prescription drug coverage after becoming eligible for Medicare, you will pay a permanent late enrollment penalty. The penalty is added to your monthly Part D premium for as long as you have coverage — it never goes away. Contact us to confirm whether your current coverage qualifies as creditable.
How We Help You Choose the Right Plan
With dozens of Part D plans available in your area, the right choice isn't obvious. We do the comparison work for you — at no cost.
We review your medications
You share your current prescription list. We check coverage and costs across every available plan in your county.
We compare plans side by side
We look at premiums, deductibles, tier placement for your specific drugs, and preferred pharmacy networks.
We recommend the best fit
We show you your projected annual cost under each plan — not just the monthly premium — so you can make a truly informed decision.
We review every year
Plans change annually. We contact you before each Annual Enrollment Period to make sure your plan is still your best option.