Medicare Part D helps cover the cost of your prescription medications. You can get it as a standalone plan alongside Original Medicare or a Medicare Supplement, or bundled into a Medicare Advantage plan. Either way, going without creditable drug coverage once you’re Medicare-eligible is one of the most common — and most avoidable — costly mistakes we see.
The late-enrollment penalty is permanent. If you go 63 days or more without creditable drug coverage after you’re first eligible, Medicare adds roughly 1% of the national base premium to your monthly Part D cost for every month you went without it — for as long as you have Part D. Even if you rarely take medication now, that can change, and the penalty follows you either way.
What Part D Actually Covers
- ✓ Brand-name and generic prescription medications on the plan’s formulary (drug list)
- ✓ Coverage that moves through several cost stages over the plan year (deductible, initial coverage, and catastrophic coverage)
- ✓ Extra Help / Low-Income Subsidy for those who qualify, which can significantly reduce your costs
Every Plan’s Formulary Is Different
Two Part D plans can have wildly different costs for the exact same medications, depending on their formulary and pharmacy network. The “cheapest” plan on paper isn’t always cheapest for you once your specific prescriptions and pharmacy are factored in — which is exactly why we run a real comparison using your actual medication list rather than guessing.
When You Can Enroll or Switch
| Period | When |
|---|---|
| Initial Enrollment Period | 7 months around your 65th birthday |
| Annual Election Period | October 15 – December 7, every year |
| Special Enrollment Period | Triggered by qualifying events like losing employer drug coverage |
We recommend reviewing your Part D or Medicare Advantage drug coverage every single Annual Election Period — plan formularies and costs change from year to year, even if your medications don’t.
Don’t Let a Penalty Follow You For Life
Bring your medication list — we’ll find the plan that actually covers what you take.