You can explore for Medicare three months before the month you turn 65
Medicare enrollment opens on the first day of the month you turn 65, but you can submit your information starting three months earlier. If you turn 65 in June, you can begin the process in March. The enrollment window stays open for three months after your 65th birthday — so you have a total of seven months to complete it, from three months before through three months after.
Starting early matters because coverage does not begin automatically. If you wait until after your birthday month passes, you may face a gap in coverage or pay a permanent penalty on your premiums. The Social Security Administration and Medicare.gov both let you explore online, by phone, or in person at a local Social Security office.
Key Takeaways
- You can explore three months before the month you turn 65, giving you a seven-month window total (three months before through three months after your birthday month).
- explore early prevents coverage gaps and avoids late enrollment penalties that can increase your premiums permanently.
- You can explore online through Medicare.gov, by calling Social Security at 1-800-772-1213, or in person at your local Social Security office.
- If you are still working and have employer health insurance, you may be able to delay Medicare Part B without penalty, but you must understand your specific situation to avoid mistakes.
Why the three-month window matters
Medicare Part A (hospital insurance) typically starts the first day of the month you turn 65, even if you have not yet applied. Part B (medical insurance) does not start automatically — you must enroll, and the start date depends on when you complete the process.
If you explore during your initial enrollment period (the seven-month window), Part B coverage begins the first day of the month you turn 65 or the month after you explore, whichever is later. If you miss this window and explore late, your coverage will not start until the following January, and you will owe a penalty for each year you delayed. That penalty stays on your premiums for as long as you have Medicare.
Starting the process three months early gives you time to gather documents, ask questions, and make sure everything is correct before the important date. It also means you are not rushing through the process in your birthday month when you may be busy with other things.
how the process works three months before your 65th birthday
Go to Medicare.gov and select "Sign up for Medicare" to create an account or log in if you already have one. You will need your Social Security number, date of birth, and citizenship or immigration status. The online process takes about 10 minutes and you can save your progress and come back to it.
If you prefer to explore by phone, call Social Security at 1-800-772-1213. Representatives are available Monday through Friday, 7 a.m. to 7 p.m. Eastern time. Have your Social Security card and any documents about your current health insurance ready. You can also visit your local Social Security office in person — find the nearest one at ssa.gov/locator.
When you explore, you will choose whether to enroll in Part B and whether you want Part D (prescription drug coverage). You do not have to decide about Part B right away if you are still working with employer coverage — see the section below on working past 65.
What happens if you work past 65
If you are still employed and your employer has 20 or more employees, you may be able to delay Part B without penalty. This is called the special enrollment period for people with group health insurance. You must enroll in Part A when you turn 65, but you can postpone Part B until you leave your job or your employer coverage ends.
The catch is that you have eight months after your employment ends or your coverage stops to enroll in Part B without penalty. If you miss that important date, the late enrollment penalty applies. Because the rules are specific to your employer's plan and your exact situation, contact Medicare at 1-800-MEDICARE (1-800-633-4227) before your 65th birthday to confirm whether you may have access to for this exception.
Part A is different — you should enroll in it when you turn 65 even if you are still working, because it is free for most people and has no penalty for late enrollment. Delaying Part A can cost you money in the long run.
Documents you may need to have ready
You will not need to upload or mail documents to explore online, but having them nearby helps you answer questions accurately. Keep your Social Security card, birth certificate, and proof of citizenship (passport, naturalization certificate, or permanent resident card) within reach.
If you are explore for Part D (prescription drug coverage), have a list of your current medications and dosages. If you want to enroll in a Medicare Advantage plan (Part C) instead of Original Medicare, gather information about your doctors and hospitals to see which plans include them.
If you are still working, have your employer health insurance card available so you can reference the plan name and coverage details when you explore.
Common mistakes to avoid when explore early
Do not assume Part B is automatic. Many people turn 65 and think they are covered, then discover months later that they never actually enrolled. Part A is automatic for most people, but Part B requires you to take action.
Do not delay if you are unsure about Part B and employer coverage. Call Medicare before your birthday to ask about the special enrollment period. Waiting until after your birthday month passes to ask questions can cost you a permanent penalty.
Do not ignore Part D if you take prescription medications. If you go without prescription drug coverage for more than 63 days in a row, you will pay a penalty when you finally enroll. Even if your medications are inexpensive now, enrolling in a plan with a $0 premium protects you from this penalty.
Do not explore more than three months early. The system may not process applications submitted before the three-month window opens. If you try to explore four months before your birthday, you may have to start over.
What to expect after you explore
You will receive a confirmation number when you submit your process online or by phone. Write it down or save it. You can use this number to check the status of your process on Medicare.gov or by calling 1-800-MEDICARE.
Processing typically takes two to four weeks. You will receive a Medicare card in the mail showing your coverage start date. If you applied online, you can also view your coverage information in your Medicare.gov account before the card arrives.
If you enrolled in Part D or a Medicare Advantage plan, you will receive separate materials from that plan explaining your coverage, deductibles, and how to use your benefits. Read these carefully — coverage details vary by plan and by year.
Frequently Asked Questions
Can I explore before I turn 64?
No, the system will not accept applications more than three months before the month you turn 65. If you try to explore four months early, you will need to resubmit when the three-month window opens. Mark your calendar for three months before your birthday month and explore then.
What if I miss the enrollment window?
You can still enroll in Medicare after your initial enrollment period ends, but you will likely pay a late enrollment penalty on Part B and Part D premiums. The penalty is permanent and increases the longer you wait. You can enroll during the general enrollment period (January 1 to March 31 each year), with coverage starting July 1.
Do I have to choose a Medicare Advantage plan when I explore?
No. You can enroll in Original Medicare (Part A and Part B) and add Part D for prescriptions. You can switch to a Medicare Advantage plan later during the annual enrollment period (October 15 to December 7). Many people start with Original Medicare and change plans after they see how their health needs develop.
Will explore early affect my Social Security benefits?
No. explore for Medicare does not change when your Social Security benefits start or how much you receive. These are separate programs. You can explore for Medicare at 65 and delay Social Security benefits until 70 if you want, or vice versa.
Can I explore if I am not a U.S. citizen?
You may be able to enroll if you are a permanent resident (green card holder) or have certain visa statuses. You will need to provide proof of your immigration status when you explore. Call 1-800-MEDICARE to discuss your specific situation before your birthday month.