What is the difference between Medicare drug coverage Part D and Part B?

Asked by: Clifford Considine  |  Last update: October 22, 2025
Score: 4.4/5 (5 votes)

If you are a hospital outpatient, Part B should cover all medications that relate to the reason for your hospital visit; however, Part D will cover medications that you administer yourself and do not relate to the hospital visit.

What is the difference between Medicare Part B and Medicare Part D?

Medicare Part B only covers certain medications for some health conditions, while Part D offers a wider range of prescription coverage. Part B drugs are often administered by a health care provider (i.e. vaccines, injections, infusions, nebulizers, etc.), or through medical equipment at home.

What is the best Medicare plan that covers everything for seniors?

Original Medicare with Medigap likely offers the most comprehensive coverage, but it may also be the most costly. A person can consider their income and how much they are able to spend before choosing a Medicare plan. Original Medicare with Medigap also offers a lot of flexibility when choosing a doctor or specialist.

What are the disadvantages of Medicare Part D?

Disadvantages of Medicare Part D Prescription Drug plans include: Need to anticipate your prescription drug needs for the year: Part D plans differ in the types of drugs they cover. Knowing your medical situation can help you select a plan that is right for you and covers the prescription drugs you expect to need.

Is Medicare Part D free for seniors?

No, Medicare Part D isn't free. But in 2025, at least one $0-premium plan is available in 43 states, Washington, D.C., and Puerto Rico. Most plans do have a monthly premium. And all plans have other costs beyond premiums, such as copays, coinsurance and deductibles.

Difference Between Medicare Part B and Part D Drug Coverage - Senior Solutions Group

17 related questions found

What is the monthly cost of Medicare Part D?

Part D cost sharing

A monthly Part D plan premium (average estimated premium in 2024 is $46.50) An annual deductible (maximum $590 in 2025) A copayment or coinsurance during the initial coverage period.

Is Medicare Part B free at age 65?

Medicare Part A (hospital insurance) is free for almost everyone. You have to pay a monthly premium for Medicare Part B (medical insurance). If you already have other health insurance when you become eligible for Medicare, you may wonder if it's worth the monthly premium costs to sign up for Part B.

Is Medicare Part D really necessary?

Is Medicare Part D required? No, Medicare Part D isn't a requirement. However, many people find that enrolling in a Part D plan is worth the investment. Your health can be unpredictable, so while you may not need many (or any) prescription drugs now, you may need them in the future.

Why are people leaving Medicare Advantage Plans?

Key takeaways: People leave Medicare Advantage plans because out-of-pocket costs vary between plans, network restrictions can cause frustration, prior authorization requests can delay care, and it can be difficult to use the additional benefits they provide.

Can I drop my Medicare Advantage plan and go back to original Medicare?

Medicare Advantage Open Enrollment Period: Between January 1 and March 31 of each year, if you already have a Medicare Advantage Plan (with or without drug coverage) you can: Switch to another Medicare Advantage Plan (with or without drug coverage). Drop your Medicare Advantage Plan and return to Original Medicare.

Does everyone have to pay $170 a month for Medicare?

Most people pay no premiums for Part A. For Medicare Part B in 2025, most beneficiaries will pay $185 per month. Certain factors may require you to pay more or less than the standard Medicare Part B premium in 2025.

What are the 6 things Medicare doesn't cover?

Some of the items and services Medicare doesn't cover include:
  • Eye exams (for prescription eyeglasses)
  • Long-term care.
  • Cosmetic surgery.
  • Massage therapy.
  • Routine physical exams.
  • Hearing aids and exams for fitting them.

Can I drop my employer health insurance and go on Medicare Part B?

Once you stop working (or lose your health insurance, if that happens first) you have an 8-month Special Enrollment Period (SEP) when you can sign up for Medicare (or add Part B to existing Part A coverage).

What is the most popular Part D drug plan?

The best Medicare Part D provider is Aetna. It has top ratings from the Centers for Medicare & Medicaid Services and affordable premiums. Other great providers include Wellcare and UnitedHealthcare.

Does Medicare Part B cover eye exams?

Original Medicare ( Part A and Part B ) doesn't cover eye exams or other vision-related costs, except for special situations. However, some people on Medicare have options, including vision coverage through individual insurance or Medicare Advantage plans (Part C) with vision coverage.

Why are seniors losing Medicare Advantage plans?

Medicare vs Privatized Medicare Advantage

Beneficiaries are tossed aside because they live in an unprofitable market for their insurer or because they are actually using the insurance they signed up for to access services.

Why do doctors not like Medicare Advantage plans?

Across the country, provider grumbling about claim denials and onerous preapproval requirements by Advantage plans is crescendoing. Some hospitals and physician practices are so fed up they're refusing to accept the plans — even big ones like those offered by UnitedHealthcare and Humana.

Why are hospitals dropping Medicare Advantage plans?

Health systems have cited delayed reimbursements, cumbersome prior authorization requirements and high rates of patient claim denials for their decisions to drop Medicare Advantage plans.

What is the $2000 limit for Medicare Part D?

Thanks to the Inflation Reduction Act, in 2025 annual out-of-pocket costs will be capped at $2,000 for people with Medicare Part D.

Can I skip Medicare Part D?

If you don't sign up for a Part D plan when you are first eligible to do so, and you decide later you want to sign up, you will be required to pay a late enrollment penalty equal to 1% of the national average premium amount for every month you didn't have coverage as good as the standard Part D benefit.

Is Medicare Part D mandatory for seniors?

Enrollment in Part D is generally voluntary, however, some people are required to be enrolled, and others should not enroll. People who have Medicare and who receive assistance under certain federal programs (Medicaid, Medicare Savings Programs, SSI or the Part D Low Income Subsidy) are required to enroll.

Why is Social Security no longer paying Medicare Part B?

There could be several reasons why Social Security stopped withholding your Medicare Part B premium. One common reason is that your income has exceeded the threshold for premium assistance. Another reason could be that there was a mistake or error in your records.

What are the top 5 medicare supplement plans?

💬 From our Nerds: What are the top five Medicare supplement plans? "Based on NerdWallet's Medigap rubric, I picked five best Medicare Supplement Insurance companies for 2025: AARP/UnitedHealthcare, Mutual of Omaha, State Farm, Anthem and Blue Cross Blue Shield.

How many doctor visits does Medicare cover for seniors?

Medicare does not limit the number of times a person can consult their doctor, but it may limit how often they can have a particular test and access other services. Individuals can contact Medicare directly at 800-MEDICARE (800-633-4227) to discuss physician coverage in further detail.