Social Security Does Not Automatically Enroll You in Medicare Part B

No. Social Security will automatically enroll you in Medicare Part A (hospital insurance) when you turn 65, but Part B (medical insurance for doctor visits and outpatient care) requires a separate action on your part. You must actively choose to enroll in Part B, either when you first become may be able to access or during a specific enrollment window. If you miss the important date and do not have other may have access to coverage, you may face a permanent penalty on your Part B premiums.

The confusion happens because Part A enrollment is automatic for most people who receive Social Security benefits. Part B is different — Medicare assumes you may not want it if you have coverage through an employer or another source, so they leave the choice to you.

Key Takeaways

  • Medicare Part A (hospital coverage) enrolls automatically when you turn 65 if you receive Social Security, but Part B (doctor and outpatient coverage) does not.
  • You must enroll in Part B yourself during your Initial Enrollment Period, which runs three months before, during, and three months after the month you turn 65.
  • If you delay Part B enrollment without may have access to coverage like employer insurance, you will pay a permanent 10 percent penalty on your monthly premium for as long as you have Medicare.
  • You can enroll in Part B through Medicare.gov, by phone at 1-800-MEDICARE, or at your local Social Security office.
  • If you have employer coverage or are still working, you may have a Special Enrollment Period that lets you delay Part B without penalty.

When Part A Enrolls Automatically and Part B Does Not

When you turn 65, Social Security automatically enrolls you in Part A if you are already receiving Social Security retirement or disability benefits. This happens without any action on your part. Part A covers hospital stays, skilled nursing facility care, hospice, and home health services.

Part B is not automatic. You have to request it. Part B covers doctor visits, lab work, imaging, outpatient surgery, and other services you receive outside a hospital. Medicare does not enroll you automatically in Part B because they know some people have coverage through a current employer, a spouse's employer, or a retiree health plan, and adding Part B would mean paying for duplicate coverage.

If you are not yet receiving Social Security when you turn 65, you will not be automatically enrolled in Part A either. You will need to contact Social Security or Medicare to enroll in both parts.

Your Initial Enrollment Period for Part B

Your Initial Enrollment Period is a seven-month window centered on the month you turn 65. It starts three months before your 65th birthday and ends three months after. For example, if you turn 65 in June, your enrollment period runs from March through September.

During this window, you can enroll in Part B without any penalty, even if you do not need it right away. The enrollment takes effect on the first day of the month you turn 65, or the first day of the following month if you enroll after your birthday month.

If you miss this seven-month window and do not have other may have access to coverage, you enter what Medicare calls a "General Enrollment Period" from January 1 to March 31 each year. However, enrollment during General Enrollment comes with a permanent penalty: your Part B premium increases by 10 percent for each full year you delayed after your Initial Enrollment Period ended.

When You Can Delay Part B Without Penalty

If you are still working or have health insurance through your employer or your spouse's employer, you may have a Special Enrollment Period that lets you delay Part B without penalty. This is called the "employer coverage exception." You must be actively employed or covered under a current employer plan — retiree health plans do not always may have access to, so check with your plan administrator.

If you have a Special Enrollment Period, you can enroll in Part B anytime while you are covered by the employer plan, or within eight months after your employment or coverage ends, without paying a late penalty. You will need to show proof of your employer coverage when you enroll.

Other situations that may give you a Special Enrollment Period include coverage through TRICARE (military health insurance), the Veterans Health Administration, or certain other government programs. If you are unsure whether your coverage qualifies, contact Medicare before your Initial Enrollment Period ends.

How to Enroll in Part B

You have three main ways to enroll in Part B. The fastest is online at Medicare.gov. Go to the "Sign Up for Medicare" section, create or log into your Medicare account, and follow the enrollment steps. You will need your Social Security number and information about any current health coverage.

You can also call 1-800-MEDICARE (1-800-633-4227) and speak with a representative. They can answer questions about your coverage and help you enroll over the phone. The line is open 24 hours a day, seven days a week.

A third option is to visit your local Social Security office in person. Bring your Social Security card, proof of citizenship or legal residency, and proof of any current health coverage. You can find your nearest office at ssa.gov or by calling 1-800-772-1213.

What Happens If You Miss the important date

If you do not enroll in Part B during your Initial Enrollment Period and do not have a Special Enrollment Period, your Part B premium will increase by 10 percent for each full year you were may be able to access but not enrolled. This penalty is permanent — it stays with you for as long as you have Medicare, even if you eventually enroll.

For example, if you turn 65 in 2024 and do not enroll in Part B until 2027, you will have delayed for three full years. Your Part B premium will be 30 percent higher than the standard amount, and that extra cost will be added to your monthly bill every month you have Part B.

The only way to avoid this penalty is to enroll during your Initial Enrollment Period or to have a may have access to Special Enrollment Period. If you believe you have a Special Enrollment Period but missed it, you can contact Medicare to request a review of your situation.

Part B Premiums and Coverage Details

Part B has a monthly premium that changes each year. The standard premium amount is set by Medicare and announced in the fall for the following year. In 2024, the standard Part B premium is $164.90 per month for most people, though higher-income beneficiaries pay more through an Income-Related Monthly Adjustment Amount (IRMAA).

Part B also has an annual deductible and coinsurance costs. After you meet the deductible, you typically pay 20 percent of the cost of covered services, and Medicare pays 80 percent. Part B does not cover everything — dental, vision, and hearing care are not included, which is why many people also enroll in supplemental coverage or a Medicare Advantage plan.

Your Part B coverage begins on the first day of the month you enroll, or the first day of the following month if you enroll after your birthday month. You will receive a Medicare card in the mail showing your coverage.

Frequently Asked Questions

What if I turned 65 before I started receiving Social Security?

You were not automatically enrolled in Part A. You need to contact Social Security or Medicare to enroll in both Part A and Part B. You still have your Initial Enrollment Period — it is based on when you turn 65, not when you start receiving benefits. Contact Medicare at 1-800-MEDICARE to enroll.

Can I drop Part B after I enroll?

Yes, but only during the General Enrollment Period (January 1 to March 31 each year). If you drop Part B and later want it back, you will face a late penalty unless you have a Special Enrollment Period. Talk to Medicare before you drop coverage to understand the long-term cost.

Do I need Part B if I have a Medicare Advantage plan?

Yes. Medicare Advantage plans (Part C) require you to have both Part A and Part B. You cannot enroll in a Medicare Advantage plan without Part B. You still pay the Part B premium in addition to any premium for the Advantage plan.

Will Social Security tell me when to enroll in Part B?

Social Security will send you information about Medicare when you turn 64, but they do not automatically enroll you in Part B. You are responsible for taking action. If you are unsure, contact Medicare directly at 1-800-MEDICARE to confirm your enrollment status and important date.

What if I cannot afford the Part B premium?

If your income is low, you may be able to get help paying Part B premiums through Medicaid or the Medicare Savings Programs. These programs vary by state. Contact your state Medicaid office or call 1-800-MEDICARE to learn what programs may be available where you live.