Part D and Extra Help

Key takeaways

• How you get Part D: through a stand-alone drug plan or a Medicare Advantage plan with drug coverage
• Yearly cap: Part D out-of-pocket drug costs are capped each year; the cap was $2,000 in 2025 and is adjusted yearly
• Most useful single change: Compare plans every fall using the Medicare Plan Finder with your exact drug list.
• Commonest mistake: Skipping Part D when you first become eligible without other creditable coverage.
• See a doctor if any of the signs under "When to get help" below apply to you.

Why it matters

Drug costs are a major expense for many older adults, and many people who qualify for Extra Help never apply.

The numbers, in one place

Published figures for Part D and Extra Help

Measure	Figure
How you get Part D	through a stand-alone drug plan or a Medicare Advantage plan with drug coverage
Yearly cap	Part D out-of-pocket drug costs are capped each year; the cap was $2,000 in 2025 and is adjusted yearly
Insulin	covered insulin costs no more than $35 for a month's supply
Extra Help	helps pay Part D premiums, deductibles and copays
Automatic Extra Help	people with full Medicaid, SSI or a Medicare Savings Program qualify automatically
Late penalty	may apply if you go without creditable drug coverage for 63 days or more after you are first eligible

What helps

• Compare plans every fall using the Medicare Plan Finder with your exact drug list
• Apply for Extra Help through Social Security if your income is limited
• Ask about the Medicare Prescription Payment Plan to spread drug costs across the year
• Ask your pharmacist whether a generic or preferred-tier drug would work for you

What to avoid

• Skipping Part D when you first become eligible without other creditable coverage
• Staying in the same plan year after year without checking costs for your medicines
• Stopping a medicine because of cost without talking to your doctor

In depth

Part D is the part of Medicare that pays for prescription drugs you fill at a pharmacy. Unlike Parts A and B, it is offered only through private plans approved by Medicare, either as a stand-alone drug plan alongside Original Medicare or built into a Medicare Advantage plan. Every plan must meet a federal standard, but each sets its own premium, deductible, list of covered drugs and pharmacy network, so costs for the same medicine can differ a great deal between plans.

Each plan has a formulary, the list of drugs it covers, usually arranged in tiers. Lower tiers typically include generic drugs with small copays, while higher tiers include brand-name and specialty drugs with larger copays or coinsurance. Plans can also use prior authorization, step therapy, where you try a lower-cost drug first, and quantity limits. Knowing where your medicines sit on a formulary is the key to estimating your costs.

Recent changes in federal law have made Part D more predictable. A yearly cap now limits what you pay out of pocket for covered drugs, and the Medicare Prescription Payment Plan lets you spread those costs across the year in monthly amounts instead of paying large sums at the pharmacy. Extra Help, run with Social Security, reduces premiums and copays further for people with limited income and savings, and it now covers more people than it once did.

Signs and symptoms

• A pharmacy telling you a medicine is not on your plan's formulary
• A large bill at the pharmacy early in the year while you meet your deductible
• A notice that a drug needs prior authorization or that you must try another drug first
• Skipping doses or splitting pills to make prescriptions last because of cost
• An Annual Notice of Change showing your drug moving to a higher tier

Causes and risk factors

• The number and type of medicines you take, especially brand-name and specialty drugs
• Which pharmacy you use, since preferred pharmacies may charge less
• Your income and savings, which decide whether you qualify for Extra Help
• Whether you had creditable drug coverage when you first became eligible
• Yearly changes to plan formularies, tiers and premiums

How it is checked

The most reliable way to judge a Part D plan is to enter your exact medicines, doses and pharmacies into the Medicare Plan Finder, which estimates your total yearly cost for each plan, including the premium and what you pay at the counter. Repeat this every fall, since formularies and prices change, and keep a printed or saved copy of your comparison.

To check whether you qualify for Extra Help, you can apply online, by phone or in person through Social Security. The application looks at your income and certain resources such as bank accounts and investments, but not your home, car or personal belongings. If you already have full Medicaid, Supplemental Security Income or a Medicare Savings Program, you qualify automatically and should receive a letter confirming it.

Related topics

• Lowering Prescription Costs: What Published Guidance Supports (Health Insurance and Costs)
• What the Guidance Really Says About Benefits and Financial Support (Long-Term Conditions)
• The Evidence on Travel Insurance and Healthcare Abroad, Without the Hype (Travel Health)
• Annual Wellness Visit: What the Evidence Actually Says (Preventive Care)

Where to go next

• New to Part D and Extra Help? Start Here
• A Q and A on Part D and Extra Help
• Medicare and Medicaid: The Complete Guide
• Medicare Enrollment Periods: What the Evidence Actually Says
• The Evidence on Medigap Policies, Without the Hype

When to get help

Tell your doctor or pharmacist if you cannot afford a prescription before you stop taking it, since some medicines are dangerous to stop suddenly. Call 911 for a medical emergency and Poison Control at 1-800-222-1222 for a medicine overdose.

Where this comes from

• Medicare.gov — How Medicare drug coverage works
• Medicare.gov — Help with drug costs

How this page was put together

Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarized or generalized beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.

Medical disclaimer

This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to your doctor, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 911.