Medicare Part B is not automatic — you can turn it down, but there are real costs to waiting

No, you do not have to take Medicare Part B (medical insurance covering doctor visits, outpatient care, and some equipment). You can refuse it when you first become may be able to access at 65. However, if you delay without a valid reason, you will pay a permanent penalty on your premiums for as long as you have Medicare — usually 10 percent more for each year you waited. The penalty does not go away.

The decision depends on whether you have other health coverage. If you are still working and covered by your employer's plan, you can delay Part B without penalty. If you are uninsured or covered only by Part A (hospital insurance), delaying Part B usually costs you more in the long run than the monthly premium would.

Key Takeaways

  • You can refuse Part B at 65, but you will pay a permanent 10 percent penalty on premiums for each year you delayed, unless you had employer coverage or other may have access to insurance.
  • If you are covered by an employer plan through your own job (not a spouse's), you can delay Part B without penalty as long as that coverage continues.
  • Once you lose employer coverage, you have a limited window — usually 63 days — to sign up for Part B without triggering the penalty.
  • Part B covers doctor visits, lab work, imaging, and some equipment; without it, you pay the full cost of these services out of pocket.
  • The standard Part B premium in 2024 is $174.70 per month for most people, but higher earners pay more based on income.

When you can safely skip Part B without a penalty

You can delay Part B without penalty only if you have creditable coverage — health insurance through your current employer or your spouse's current employer. The employer plan must be based on active employment, meaning you or your spouse is still working. Retiree coverage from a former employer usually does not count as a reason to delay.

If you have coverage through the Veterans Administration (VA), TRICARE (military family coverage), or a federal employee plan, those also may have access to. The key is that the coverage must be active and in force when you turn 65. Once that coverage ends, your window to sign up for Part B without penalty closes quickly — you typically have 63 days after the coverage ends to enroll.

The permanent penalty if you delay without may have access to coverage

If you turn down Part B and do not have employer coverage or other may have access to insurance, Medicare charges you a late enrollment penalty. The penalty is 10 percent of the standard Part B premium for each full year you were may be able to access but did not sign up. That percentage is added to your premium permanently — it does not expire when you finally enroll.

For example, if you delay Part B for three years and the standard premium is $175 per month, your penalty would be 30 percent of that amount, or roughly $52.50 per month, added to your premium for life. Over a decade, that adds up to thousands of dollars. The penalty applies even if you eventually sign up at 68 or 70.

What Part B actually covers and what it costs

Part B covers doctor office visits, preventive care (like annual wellness visits and screenings), lab work, X-rays and imaging, outpatient surgery, and some equipment like wheelchairs and oxygen. It does not cover routine dental, vision, or hearing care. You pay a monthly premium (the standard amount is $174.70 in 2024, though higher earners pay more), an annual deductible (currently $240), and then 20 percent of the cost of most services after the deductible is met.

If you do not have Part B and need a doctor visit, you pay the entire cost yourself. A routine office visit can cost $150 to $300 or more depending on where you live and what the doctor charges. An imaging study like an MRI can run $500 to $2,000 without insurance. Over time, the monthly Part B premium is usually far less than the cost of even a few uninsured medical visits.

How to delay Part B if you have employer coverage

If you are still working and covered by your employer's health plan, you can turn down Part B when you turn 65. You do not need to do anything special — straightforward do not sign up during your initial enrollment period. Keep your employer coverage active and current.

When you or your spouse stops working and lose the employer plan, you will have a 63-day window to sign up for Part B without penalty. Contact Social Security or Medicare during that window to enroll. If you miss the window, the late enrollment penalty applies. Some employers offer a notice or reminder when coverage will end; if yours does, pay attention to the date.

What happens if you miss the important date to sign up

If your initial enrollment period passes and you do not sign up for Part B, you can still enroll later during the General Enrollment Period, which runs January 1 through March 31 each year. Coverage would start July 1. However, you will owe the late enrollment penalty unless you had may have access to coverage during the time you were not enrolled.

The penalty is calculated based on how many months you were may be able to access but not enrolled. Even a few months of delay can result in a small permanent increase to your premium. The longer you wait, the larger the penalty. There is no way to remove the penalty once it is applied, so the cost of delaying without a valid reason compounds over time.

Part B and Medicare Advantage or Medigap plans

If you are considering a Medicare Advantage plan (Part C) or a Medigap supplemental plan, you must be enrolled in both Part A and Part B first. You cannot use Medicare Advantage or Medigap as a reason to skip Part B. Part B is the foundation; the other plans layer on top of it.

Some people think that because they have a Medigap plan or are considering Medicare Advantage, they do not need Part B. That is not correct. You need Part B to access either of those options. If you delay Part B, you also delay access to these supplemental plans, and the late enrollment penalty still applies.

Frequently Asked Questions

Can I drop Part B after I sign up if I decide I do not want it?

Yes, you can drop Part B, but you will face the late enrollment penalty if you sign up again later without a valid reason. If you drop Part B and then re-enroll during the General Enrollment Period, the penalty applies based on the months you were not covered. It is usually better to keep Part B once you have it.

What if my employer says they will cover my medical costs even after I retire?

Retiree coverage from an employer does not count as a reason to delay Part B. You should sign up for Part B when you turn 65 or within your initial enrollment period. If you do not, the late enrollment penalty applies when you eventually enroll, even if your employer is paying your medical bills.

Do I have to take Part B if I am still working at 65?

Only if you are covered by your employer's health plan. If you are working but have no health coverage, you should sign up for Part B to avoid the penalty. If you are covered by your employer, you can delay Part B as long as that coverage continues.

What is the difference between the initial enrollment period and the general enrollment period?

Your initial enrollment period is the seven months around your 65th birthday — three months before, the month you turn 65, and three months after. During this window, you can sign up for Part B without penalty if you do not have may have access to coverage. The General Enrollment Period is January 1 through March 31 each year, but signing up then triggers the late enrollment penalty if you missed your initial period.

If I have VA coverage, do I still need Part B?

VA coverage counts as may have access to coverage, so you can delay Part B without penalty as long as your VA benefits are active. However, VA and Medicare are separate systems and do not always cover the same services. Many veterans choose to enroll in Part B anyway for broader coverage, but you are not required to if VA is your primary coverage.