OFFICIAL 2026 EDUCATIONAL RESOURCE BY WALTER JOHNSON, LICENSED INSURANCE AGENT (CA #0J15814).
How Medicare handles prescription drug coverage and what you need to enroll
Written by Walter Johnson, Licensed Insurance Agent
This article is for educational purposes only and is not a solicitation for insurance
Does Medicare cover prescription drugs? Learn how Part D works, what’s covered, and how to avoid costly gaps in coverage.
Can Medicare Cover Prescription Drugs?
Yes — Medicare can cover prescription drugs, but only if you enroll in the right type of coverage.
Original Medicare does not cover most prescription medications you pick up at a pharmacy. To get full drug coverage, you typically need to enroll in additional coverage.
Understanding how this works can help you avoid high out-of-pocket costs and gaps in coverage.
Start here: 👉 Medicare Coverage
How Medicare Prescription Drug Coverage Works
When it comes to prescription drugs, Medicare coverage depends on the type of plan you have.
This determines:
What medications are covered
How much you pay
Where you can fill prescriptions
Whether you have coverage at all
Understanding this structure is key to making the right decision.
What Original Medicare Covers
Original Medicare provides only limited prescription drug coverage.
Part A covers medications during an inpatient hospital stay
Part B covers certain outpatient drugs, including:
Doctor-administered injections
Some chemotherapy drugs
Immunosuppressants in specific situations
Certain vaccines
However, most routine prescriptions from a pharmacy are not covered.
Related: 👉 Does Medicare Cover Hospital Stays
See also: 👉 Does Medicare Cover Outpatient Services
How Medicare Part D Works
Medicare Part D is the primary way to get prescription drug coverage.
These plans are offered by private insurance companies and include a list of covered drugs called a formulary.
Most plans cover:
Generic and brand-name medications
Drugs for chronic conditions
Common retail prescriptions
Each plan is different, so it’s important to review coverage carefully.
Medicare Advantage and Drug Coverage
Some Medicare Advantage (Part C) plans include prescription drug coverage.
These plans combine:
Hospital coverage
Medical coverage
Often prescription drugs
Not all plans include drug coverage, so it’s important to confirm before enrolling.
Learn more: 👉 How Medicare Advantage Plans Work
Learn more: 👉 Is Medicare Advantage Worth It?
See also: 👉 Medicare Advantage vs Medigap
What Prescription Drug Coverage Costs
Costs vary depending on your plan, but typically include:
A monthly premium
A yearly deductible
Copayments or coinsurance for medications
Costs may also vary based on:
Drug type
Pharmacy
Plan structure
Learn more: 👉 How Much Does Medicare Cost Per Month
Related: 👉 Medicare Costs Explained
Coverage Phases in Part D
Medicare Part D coverage is divided into phases:
Deductible phase — you pay full cost first
Initial coverage phase — you share costs with the plan
Coverage gap — your share of costs may increase
Catastrophic coverage — your costs drop significantly
These phases impact what you pay throughout the year.
What Medicare Does NOT Cover
Even with Part D, some medications are usually excluded, including:
Cosmetic drugs
Weight loss or weight gain medications
Most over-the-counter drugs
Fertility medications in most cases
Coverage varies by plan.
Learn more: 👉 What Medicare Doesn’t Cover
Do You Need Prescription Drug Coverage?
You may want to enroll in Part D if:
You take regular medications
You want protection from future drug costs
You don’t have other creditable coverage
If you delay enrollment without other coverage, you may face late enrollment penalties.
Learn more: 👉 When to Enroll in Medicare
How to Choose the Right Plan
To choose the right prescription drug plan, consider:
Your medications
Total yearly costs
Pharmacy access
Drug pricing tiers
Each plan is different, so comparing options is important.
Why This Matters
Understanding Medicare prescription drug coverage helps you:
avoid unexpected costs
prevent coverage gaps
make informed healthcare decisions
Next Step
Now that you understand how Medicare covers prescription drugs, the next step is reviewing what Medicare does and does not include overall.
Continue to: 👉 What Medicare Doesn’t Cover
Related Guides
• Medicare Coverage
• How Medicare Advantage Plans Work
• What Medicare Doesn’t Cover
• When to Enroll in Medicare