The short answer
Medicare starts at 65 for almost everyone. Social Security can start anywhere from 62 to 70, and waiting longer means a bigger monthly check. The two are separate choices. You can take Medicare at 65 and wait on Social Security, or take Social Security at 62 and still wait until 65 for Medicare.
The one place they touch is paperwork. Social Security runs Medicare enrollment, so if you are already getting a Social Security check at 65, Medicare signs you up on its own. If you are not, you have to sign up yourself. That is the step people miss.
Medicare's clock: your Initial Enrollment Period
Your first chance to sign up for Medicare is a seven-month window around your 65th birthday. It starts three months before your birthday month, includes your birthday month, and ends three months after. If you sign up in the three months before your birthday month, coverage starts the first day of your birthday month. If you sign up during your birthday month or the three months after, coverage starts the first of the next month.
One quirk: if your birthday is on the first of the month, your Medicare starts a month early, on the first of the month before. We have a full checklist on our Turning 65 page, and the other enrollment windows are on Enrollment periods.
Social Security's clock: full retirement age by birth year
Your full retirement age is the age you get 100 percent of your earned benefit. Take it earlier and the check is smaller for life. Wait past it, up to age 70, and the check grows about 8 percent a year. Taking Social Security at 62 instead of 67 cuts the monthly amount by about 30 percent.
| Year you were born | Full retirement age |
|---|---|
| 1943 to 1954 | 66 |
| 1955 | 66 and 2 months |
| 1956 | 66 and 4 months |
| 1957 | 66 and 6 months |
| 1958 | 66 and 8 months |
| 1959 | 66 and 10 months |
| 1960 or later | 67 |
Source: Social Security, starting your retirement benefits early.
Notice that Medicare is not on this table. Medicare's age stayed at 65 when full retirement age moved up. That gap, between 65 and 67, is where most of the confusion comes from.
If you are already getting Social Security at 65
You do not need to do anything. Social Security enrolls you in Part A and Part B automatically, and your red, white and blue Medicare card arrives about three months before your 65th birthday. Your Part B premium is taken out of your Social Security check each month.
If you are still working and have employer coverage, you can send the card back and decline Part B. Read the instructions that come with the card, and call us first. Declining Part B when you should not can lead to a lifetime penalty.
If you are not getting Social Security yet
You have to sign up for Medicare yourself. You can do it online at ssa.gov/medicare/sign-up, by calling Social Security at 800-772-1213, or at a local office by appointment. You can choose Medicare only and leave your retirement benefit alone until later.
Without a Social Security check, there is nothing for Medicare to deduct the Part B premium from. So Medicare mails you a bill, usually every three months. You can pay online, by mail, or set up automatic bank payments through Medicare Easy Pay. Once you do start Social Security, the premium moves to your check.
Working past 65 with a health savings account
If you have an HSA through work, Medicare changes the math. You cannot contribute to an HSA once any part of Medicare begins, including premium-free Part A. You can still spend what is already in the account, including on Medicare premiums.
Here is the catch. When you enroll in Part A after 65, Social Security backdates it up to six months, though never before your 65th birthday month. Any HSA contributions made during those backdated months count as excess and can bring a tax penalty. The simple fix: stop HSA contributions six months before the month you plan to apply for Medicare or Social Security. If you are turning 65 and enrolling on time, just stop the month your Medicare starts.
Medicare and Social Security side by side
| Item | Medicare | Social Security retirement |
|---|---|---|
| Earliest age | 65 (earlier with a disability) | 62 |
| Does waiting help? | No. Waiting past 65 without other coverage brings penalties. | Yes. Each year you wait, up to 70, raises the check. |
| Can I take one without the other? | Yes | Yes |
| Who signs you up | Social Security, automatically if you already get benefits | You apply |
| How Part B is paid | From your Social Security check, or a quarterly bill if you have none | Not applicable |
Social Security offices near Kansas City
Most things can be done online or by phone now, but some people prefer to go in. The Kansas City area has offices in downtown Kansas City on Truman Road, in Kansas City North, in south Kansas City, in Independence on Noland Road, in Lenexa for Johnson County, and in Kansas City, Kansas. There is no office in Overland Park itself; Johnson County residents use Lenexa.
Hours, addresses and appointment rules change, so please confirm your office on the official Social Security office locator before you go. Enter your ZIP code and it shows the office that serves you. Many offices now ask you to call ahead for an appointment.
Mistakes we see most often
- Waiting for a card that never comes. If you are not on Social Security, no one enrolls you. Mark your calendar three months before your birthday.
- Taking Social Security early just to get Medicare. You do not need to. Medicare is available at 65 either way.
- Keeping HSA contributions going. The six-month lookback catches people who enroll in Part A after 65.
- Assuming a small employer plan counts. With fewer than 20 employees, Medicare usually pays first, and skipping Part B can leave big gaps.
Get your personal Medicare timeline
Send us your name, number and ZIP code. A licensed local agent will call, confirm your dates, and tell you exactly what to do and when. Free, no pressure.
Call us first
Before you decline Part B, start Social Security, or stop an HSA, talk with a local agent. We will look at your whole picture, and it is free. Call (816) 307-6165 or book a free review.
Sources
- Social Security: Starting your retirement benefits early (full retirement age table)
- Social Security: Sign up for Medicare
- Medicare.gov: When does Medicare coverage start
- Journal of Accountancy: Medicare rules on HSAs after age 65
- Social Security office locator
Reviewed by a licensed Cole Insure agent. Last checked October 2026.
Questions people ask us
Do I have to take Social Security to get Medicare?
No. Medicare starts at 65 for most people no matter when you take Social Security. If you are not drawing benefits yet, you sign up for Medicare yourself through Social Security, online or by phone, and Medicare bills you for Part B.
If I am already on Social Security, do I need to sign up for Medicare?
Usually not. If you get Social Security retirement or disability benefits at least four months before you turn 65, you are enrolled in Parts A and B automatically. Your card arrives in the mail about three months before your birthday.
Can I delay Medicare if I am still working at 65?
You can often delay Part B without penalty if you or your spouse have health coverage from a current employer with 20 or more workers. Smaller employer plans usually require Part B. Call us before you decide, because the rules have exceptions.
What is my full retirement age?
It depends on your birth year. People born in 1960 or later reach full retirement age at 67. People born from 1955 to 1959 fall between 66 and 2 months and 66 and 10 months. Medicare still starts at 65 for everyone.
Can I keep putting money in my HSA after 65?
Only if you have not enrolled in any part of Medicare. Once Part A starts, you can no longer contribute. Because Part A can be backdated up to six months when you enroll late, stop HSA contributions six months before you apply.
Where is the Social Security office in Kansas City?
The Kansas City area has several offices, including ones in downtown Kansas City, Kansas City North, south Kansas City, Independence and Lenexa. Hours and addresses change, so confirm your office on the Social Security locator at ssa.gov/locator before you go.