Your 7-month window
| When you sign up | When coverage starts |
|---|---|
| 3, 2 or 1 month before your birthday month | First day of your birthday month |
| Your birthday month | First day of the next month |
| 1, 2 or 3 months after your birthday month | First day of the month after you sign up |
| After your window, with no special enrollment period | General Enrollment Period, January 1 to March 31; coverage starts the next month, and a penalty may apply |
If you already get Social Security benefits at least 4 months before you turn 65, you'll be enrolled automatically and your card arrives about 3 months ahead. Otherwise, apply online at ssa.gov/medicare/sign-up, by calling 1-800-772-1213 (TTY 1-800-325-0778), or at a Social Security office.
What's different in Ohio?
- Public retirees: if your pension is from OPERS, STRS Ohio, SERS, OP&F or HPRS rather than Social Security, you won't be enrolled automatically. STRS Ohio requires Part B (and premium-free Part A if available) to keep its medical coverage, and OPERS requires Parts A and B. Apply early in your window and send your system proof of enrollment. See Ohio public retirement systems and Medicare.
- Medigap timing: Ohio has no birthday rule, so plan your Medigap decision for the 6 months after your Part B starts.
- Help paying: if your income is limited, apply for Ohio's Medicare Premium Assistance Programs at benefits.ohio.gov at the same time; see Medicare Savings Programs in Ohio.
When waiting is OK
If you or your spouse have group coverage from current work at an employer with 20 or more employees, you can usually delay Part B and sign up within 8 months after that job or coverage ends. COBRA and retiree coverage don't count. See working past 65.
For the full timeline, use the turning 65 in Ohio checklist. To compare coverage before your Medicare starts, you can request a call from a licensed insurance agent to go over plans from the companies they work with.
Related questions
How do I sign up for Medicare in Ohio?
Online, by phone or in person.
What if I miss my enrollment period?
Penalties and the General Enrollment Period.
What are the Medicare deadlines for 2027?
Every date in one place.
Sources
- Medicare.gov — When does Medicare coverage start?
- Social Security — Sign up for Medicare
- Ohio Administrative Code 3307:1-11-03 — STRS Ohio medical plan
- OPERS — 2026 Health Care Program Guide
- Ohio Administrative Code 3901-8-08 — Medicare supplement
More questions in this guide
- Can I get Medicare before 65 in Ohio?
- Do I need Medicare Part B if I'm still working at 65 in Ohio?
- How do I sign up for Medicare in Ohio?
- What are the Medicare deadlines in Ohio for 2027?
- What happens if I miss my Medicare enrollment period in Ohio?
- What happens to my Medicare if I move to Ohio?
Part of the guide: Medicare enrollment periods in Ohio · All questions
Frequently asked questions
What if I sign up during my birthday month?
Your coverage starts the first day of the next month. Signing up in any of the 3 months after your birthday month also starts coverage the month after you sign up, so waiting means a short gap if you have no other coverage.
My birthday is on the 1st. Does that change anything?
Yes. Social Security treats you as turning 65 the day before, so your window and coverage start a month earlier: your coverage can begin the first day of the month before your birthday month.
Does my Medigap clock start when I sign up?
It starts when your Part B starts, as long as you're 65. Ohio's 6-month Medigap open enrollment period is your one guaranteed chance to buy any policy, since Ohio has no birthday rule. Delaying Part B because of job coverage delays this window too.
Medicare in your Ohio county
Plans, local agents and help, county by county: Franklin · Cuyahoga · Hamilton · Summit · Montgomery · Lucas · Butler · Stark · Lorain · Warren · Delaware · Lake · Mahoning · Clermont · Trumbull · Licking · Medina · Greene · Fairfield · Portage · All 88 counties →
