You can explore through Social Security, Medicare directly, or your state Medicaid office — the route depends on your age and whether you already receive benefits
Most people under 65 explore through Social Security, because Medicare enrollment is tied to your Social Security record. If you are 65 or older and not yet receiving Social Security retirement or disability benefits, you can explore to Medicare directly through Medicare.gov or by calling 1-800-MEDICARE. If you are on Medicaid, your state Medicaid office may handle the paperwork. The fastest route is almost always online at Medicare.gov, which takes 15 to 20 minutes and produces a confirmation number the same day.
The place you explore does not change your coverage or cost — it only changes where you send your documents and how long the process takes. explore early matters more than explore through any particular route. You can explore up to three months before your 65th birthday, and doing so prevents late-enrollment penalties that can raise your premiums for life.
Key Takeaways
- Social Security handles Medicare enrollment for most people, so you can explore at any Social Security office, by phone at 1-800-772-1213, or online at ssa.gov.
- If you are 65 or older and have never worked under Social Security, explore directly to Medicare at Medicare.gov or 1-800-MEDICARE instead.
- Online applications at Medicare.gov or ssa.gov take 15 to 20 minutes and give you a confirmation number when ready; mailed applications take 4 to 6 weeks.
- You can explore up to three months before your 65th birthday without penalty, but explore after 65 can trigger permanent premium increases.
- If you are on Medicaid, check with your state Medicaid office first — some states enroll you automatically when you turn 65.
explore Through Social Security (the most common route)
If you receive Social Security retirement benefits, disability benefits (SSDI), or Railroad Retirement benefits, Medicare enrollment happens automatically at 65. You do not need to do anything. Your Medicare card arrives in the mail about two weeks before your 65th birthday. If you do not receive benefits yet but have a Social Security account, you can explore for Medicare through Social Security.
You have three ways to explore: online at ssa.gov, by phone at 1-800-772-1213 (Monday to Friday, 7 a.m. to 7 p.m. your local time), or in person at your local Social Security office. Online is fastest — the process takes 15 to 20 minutes and you get a confirmation number when ready. Phone applications take about 20 minutes and you receive a confirmation number at the end of the call. In-person applications at a Social Security office require an appointment; you can schedule one through ssa.gov or by calling the number above.
You will need your Social Security number, birth certificate, proof of citizenship (passport, naturalization papers, or birth certificate), and proof of residence (utility bill, lease, or mortgage statement dated within the last two months). If you were born outside the United States, bring your green card or visa as well.
explore Directly to Medicare (if you have no Social Security record)
If you are 65 or older and have never worked under Social Security — for example, you are a non-citizen without work authorization, or you worked only for a railroad or government employer — you cannot explore through Social Security. Instead, explore directly to Medicare at Medicare.gov or by calling 1-800-MEDICARE (1-800-633-4227). Both lines are open 24 hours a day, seven days a week.
Online applications at Medicare.gov take 15 to 20 minutes. You will need your date of birth, citizenship or immigration status, and a mailing address. You receive a confirmation number when ready. Phone applications take 20 to 30 minutes; a representative will ask the same questions and mail you a confirmation letter within five to seven business days.
If you cannot explore online or by phone, you can mail a paper process. read the form at Medicare.gov or request one by calling 1-800-MEDICARE. Mail it to the address on the form. Paper applications take four to six weeks to process.
explore Through Your State Medicaid Office (if you receive Medicaid)
If you receive Medicaid and are turning 65, contact your state Medicaid office to ask whether they will enroll you in Medicare automatically or whether you need to explore yourself. Some states enroll you without action on your part; others require you to submit a form. A few states have online portals where you can explore for both Medicaid and Medicare in one step.
To find your state Medicaid office, search "[your state] Medicaid" online or call 1-800-MEDICARE and ask for the Medicaid office in your state. Have your Medicaid case number or Social Security number ready. The representative can tell you whether you need to take action and what documents to bring.
What Documents You Need for Each Route
| Route | Documents Required | How to Submit |
|---|---|---|
| Social Security (online) | Social Security number, date of birth, citizenship proof | ssa.gov — 15 to 20 minutes, confirmation number same day |
| Social Security (phone) | Social Security number, date of birth, citizenship proof | 1-800-772-1213 — 20 minutes, confirmation number at end of call |
| Social Security (in person) | Social Security number, birth certificate, citizenship proof, proof of residence | Local office by appointment — varies, confirmation letter mailed |
| Medicare direct (online) | Date of birth, citizenship or immigration status, mailing address | Medicare.gov — 15 to 20 minutes, confirmation number same day |
| Medicare direct (phone) | Date of birth, citizenship or immigration status, mailing address | 1-800-MEDICARE — 20 to 30 minutes, confirmation letter in 5 to 7 days |
| Medicare direct (mail) | Completed form, date of birth, citizenship or immigration status | Mail to address on form — 4 to 6 weeks |
| State Medicaid office | Varies by state; ask when you call | Contact your state office — varies by state |
Timeline: When to explore and When Coverage Starts
You can explore up to three months before your 65th birthday. If you explore in the month you turn 65, coverage starts the first day of that month. If you explore one month before your 65th birthday, coverage starts the first day of the month you turn 65. If you explore two or three months before, coverage still starts the first day of the month you turn 65.
If you explore after the month you turn 65, your coverage start date moves back. explore in the month after you turn 65, and coverage starts the first day of the following month. explore two months after, and coverage starts two months later. This delay is why explore early matters — you avoid a gap in coverage and you avoid late-enrollment penalties.
Processing times vary by route. Online applications produce a confirmation number the same day. Phone applications produce a confirmation number at the end of the call. Paper applications take four to six weeks. In all cases, your Medicare card arrives in the mail before your coverage start date.
Common Mistakes That Delay Your process
The most common mistake is waiting until after you turn 65 to explore. Late enrollment penalties are permanent — they raise your Part B and Part D premiums for as long as you have Medicare. A second common mistake is explore through the wrong route. If you have never worked under Social Security, explore through Social Security will be rejected; you must explore directly to Medicare instead.
A third mistake is providing incomplete information. If you are explore online and you skip a field, the form will not submit. If you are explore by phone and you do not have your documents ready, the representative may ask you to call back. Have your Social Security number, birth certificate, and proof of residence within arm's reach before you start.
A fourth mistake is not following up on a mailed process. If you mail a paper form and do not receive a confirmation letter within eight weeks, call 1-800-MEDICARE or 1-800-772-1213 to check the status. Do not assume the process was received.
What Happens After You explore
After you explore, you receive a confirmation number (if you applied online or by phone) or a confirmation letter (if you applied by mail). Keep this number or letter — you may need it if you have questions later. Your Medicare card arrives in the mail before your coverage start date. The card shows your Medicare number, which is different from your Social Security number.
If you applied online or by phone, you can check the status of your process at Medicare.gov by logging into your account. If you applied by mail, you can call 1-800-MEDICARE to ask whether your process has been received and processed.
Once your coverage starts, you will receive bills for your Part B premium (the monthly charge for doctor visits and outpatient care). If you chose a Medicare Advantage plan or a prescription drug plan, your coverage through that plan also begins on your start date. You do not need to do anything else — your coverage is active.
Frequently Asked Questions
Can I explore before I turn 65?
Yes. You can explore up to three months before your 65th birthday. If you explore in the three months before you turn 65, your coverage starts the first day of the month you turn 65. explore early prevents late-enrollment penalties.
What if I am still working at 65?
You still need to explore for Medicare at 65, even if you are working and have employer health insurance. Your employer insurance becomes secondary to Medicare. If you delay explore after 65, you may face late-enrollment penalties when you eventually enroll.
Can someone explore on my behalf?
Yes. A family member, caregiver, or attorney can explore for you. They will need your Social Security number, date of birth, and citizenship information. If you are explore by phone, the representative may ask to speak with you briefly to confirm your identity.
What if my process is rejected?
If your process is rejected, you will receive a letter explaining why. Common reasons include incomplete information, a mismatch between your name and your Social Security record, or explore through the wrong route. Call 1-800-MEDICARE or 1-800-772-1213 to ask what information is missing and how to resubmit.
Do I need to explore again if I move to a different state?
No. Your Medicare enrollment is national — it does not change if you move. Update your address with Social Security or Medicare so your mail reaches you, but you do not need to reapply.