Which parts of Medicare are mandatory?

Asked by: Omari Marquardt  |  Last update: January 4, 2026
Score: 4.3/5 (22 votes)

Enrolling in Medicare Part A is mandatory for people ages 65 and over who receive Social Security benefits. Enrollment in Part B is voluntary. Most people choose to have either Part B coverage or a private health insurance policy that covers medical expenses.

Which parts of Medicare are optional?

Part D (Medicare drug coverage)

Medicare drug coverage is optional. It's available to everyone with Medicare. Most Medicare Advantage Plans include Part D coverage. In most types of Medicare Advantage Plans, you can't join a separate Medicare drug plan.

Can I decline Medicare Part B coverage?

2 ways to drop coverage

To drop Part B (or Part A if you have to pay a premium for it), you usually need to send your request in writing and include your signature. Contact Social Security.

Do I need Medicare Part C or D?

If you have Original Medicare and just need a plan for prescription medications, Medicare Part D is the best choice. When you require more coverage for dental, vision, or prescription drugs, Medicare Part C plans provide more options to fit your healthcare needs.

Do I need both Medicare Part A and B?

If you aren't eligible for free Part A, you don't have to enroll. However, if you want to buy Medicare coverage and you want Part A, you also have to buy Part B.

Is Medicare Mandatory

42 related questions found

Is Medicare Part B mandatory at age 65?

1. If You Are Approaching or at Age 65. If you are approaching age 65 and you already receive Social Security or Railroad Retirement benefits through early retirement, you will be automatically enrolled in Medicare Parts A (hospital insurance) and B (medical insurance) when you turn 65.

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.

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.

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.

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.

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.

Does a person really need Medicare Part B?

Part B is optional. Part B helps pay for covered medical services and items when they are medically necessary. Part B also covers some preventive services like exams, lab tests, and screening shots to help prevent, find, or manage a medical problem.

Does Medicare cover 100% of hospital bills?

Whether you're new to Original Medicare or have been enrolled for some time, understanding the limitations of your coverage is important as you navigate decisions about your healthcare. One of the main reasons why Original Medicare doesn't cover 100% of your medical bills is because it operates on a cost-sharing model.

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).

Why are seniors losing Medicare Advantage plans?

Health systems and hospitals are also making the decision to cancel contracts due to excessive prior authorization denial rates and slow payments from insurers. Already 27 health systems have canceled their Medicare Advantage contracts this year.

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.

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.

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.

What is the penalty for not getting Part D Medicare?

Part D late enrollment penalty

You'll pay an extra 1% for each month you could have signed up for Part D, but didn't, and didn't have creditable drug coverage. We'll add this penalty to your monthly Part D premium. , it'll be added to your monthly premium.

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.

Is there a Medicare plan that pays 100%?

Medicare Advantage Plan (Part C):

Deductibles, coinsurance, and copayments vary based on which plan you join. Plans also have a yearly limit on what you pay out-of-pocket. Once you pay the plan's limit, the plan pays 100% for covered health services for the rest of the year.

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.

Is UnitedHealthcare a good insurance for Medicare for seniors?

UnitedHealthcare Medicare Advantage plans are rated at about the industry average, receiving an average rating of 3.93 stars out of 5 from the Centers for Medicare & Medicaid Services (CMS) for 2025, weighted by enrollment. For comparison, the average weighted star rating for plans from all providers is 3.95.