Plans & products
Medicare Part D
Part D is Medicare's answer to prescription costs. You buy it from a Medicare-approved private insurer, either as a standalone drug plan next to Original Medicare or baked into a Medicare Advantage plan.
What is Medicare Part D?
Part D is optional coverage for prescription medications, open to anyone with Part A or Part B. Every plan carries its own drug list (formulary), its own pricing, and its own pharmacy network, which is exactly why plan choice matters so much.
2026 Part D benefit structure
2026 brought the friendliest changes Part D has seen in years:
- A hard yearly cap: once your out-of-pocket drug spending hits $2,100, you're done paying for the year.
- Smoothed payments: you can elect to spread drug costs into level monthly payments instead of eating them at the pharmacy counter.
Key cost components
| Cost Component | Description |
|---|---|
| Monthly Premium | Varies by plan; the base beneficiary premium is $38.99. |
| Deductible | Up to $615, depending on the plan. |
| Copayments/Coinsurance | Costs for medications after meeting the deductible; varies based on the drug tier and plan specifics. |
| Late Enrollment Penalty | A penalty may apply if you enroll in Part D after your initial eligibility period without having other credible prescription drug coverage. |
Enrollment periods
- Initial Enrollment Period (IEP): Begins three months before, includes the month of, and ends three months after your 65th birthday or Medicare eligibility date.
- Annual Enrollment Period (AEP): October 15 to December 7 each year; during this time, you can join, switch, or drop a Part D plan.
- Special Enrollment Periods (SEPs): Available for qualifying life events, such as moving out of your plan's service area or losing other credible drug coverage.
Choosing the right plan
Four checks separate the right plan from an expensive mistake:
- Formulary: every one of your medications, covered, on a reasonable tier.
- Pharmacy network: your pharmacy in-network, ideally at preferred pricing.
- Total cost: premium plus deductible plus your actual copays, not just the sticker premium.
- Star ratings: Medicare grades every plan yearly; the ratings are free intel.
Coordination with other Medicare coverage
- With Original Medicare: a standalone Part D plan slots right in beside Parts A and B.
- With Medicare Advantage: most Advantage plans build drug coverage in, and holding an MA-PD generally blocks you from adding a separate Part D plan.
- With Medigap: Supplement plans never include drugs, so a standalone Part D plan is the partner they need.
Assistance programs
Limited income and assets can qualify you for Extra Help, the federal program that shoulders Part D premiums, deductibles and copays. Plenty of eligible people never claim it; checking costs nothing.
Final thoughts
"Optional" undersells Part D. For anyone taking regular medications it is the difference between managed costs and pharmacy sticker shock, and the 2026 cap makes the math better than it has ever been.
Our Part D review starts with your actual medicine cabinet, not a brochure:
- Every plan in your county priced against your exact drug list
- Your pharmacy checked for network status and preferred pricing
- Extra Help eligibility screened while we're at it
- Enrollment timed so gaps and penalties never happen
Ten minutes on the phone with your prescription list usually settles it.
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