Turning 65 in Florida: Transitioning to Medicare Without a Gap
By Licensed Florida Health Insurance Producer · NPN #21249133 · Updated January 2026
Key Takeaways
Medicare eligibility begins at 65 — your 7-month Initial Enrollment Period starts 3 months before your birthday month
Enroll early to avoid a late enrollment penalty — Part B penalties are permanent
Cancel your ACA marketplace plan when Medicare begins — you can no longer receive premium tax credits once enrolled in Medicare
The Medigap open enrollment window (6 months starting when you're 65 + enrolled in Part B) is your best opportunity for guaranteed-issue supplement coverage
Florida has Medicare Advantage (Part C) and standalone Part D plans in addition to Original Medicare + Medigap
Medicare at 65: The Basics
Medicare is the federal health insurance program for people 65 and older. In Florida, Medicare is administered by the Centers for Medicare and Medicaid Services (CMS) through the Social Security Administration. You're eligible for Medicare Part A (hospital insurance) and Part B (medical insurance) starting the first day of your birthday month when you turn 65.
If you've been receiving Social Security benefits, you'll be enrolled in Medicare automatically. If not, you need to actively enroll during your Initial Enrollment Period.
Your Medicare Initial Enrollment Period
The Initial Enrollment Period (IEP) is a 7-month window:
3 months before
IEP opens. Enrolling now = earliest Part B start date (1st of birthday month). Recommended.
Birthday month
Enrolling this month = coverage starts the following month (1-month delay).
1 month after
Coverage delayed 2 months from enrollment.
2–3 months after
Coverage delayed 3 months from enrollment.
Day 1 after IEP
IEP closes. Must wait for General Enrollment Period (January–March). Late enrollment penalty begins.
Enroll 3 months before your birthday. Enrolling early is the only way to guarantee your Medicare starts exactly on your 65th birthday with no coverage gap. Waiting until your birthday month or later causes a delay in coverage start.
What Medicare Covers (and Doesn't)
Medicare Part
What It Covers
2026 Key Cost
Part A (Hospital)
Inpatient hospital, skilled nursing facility, hospice, home health
$0 premium (if 40+ work quarters); $1,676 deductible per benefit period
Part B (Medical)
Doctor visits, outpatient care, durable medical equipment, preventive care
$185.00/month standard premium; $257 annual deductible; 20% coinsurance
Part C (Medicare Advantage)
All of A + B (plus often D) from private insurers
Varies; many $0 premium options in Florida
Part D (Prescription)
Prescription drugs through private insurer
Varies; $35 monthly insulin cap; $2,000 out-of-pocket cap (2025+)
Original Medicare (Parts A and B alone) has no annual out-of-pocket maximum — meaning a serious illness could result in unlimited costs. Most Medicare beneficiaries add either Medigap (Medicare Supplement) or Medicare Advantage to limit their exposure.
Transitioning from ACA Marketplace to Medicare
If you've been on an ACA marketplace plan (as an early retiree or otherwise), the Medicare transition requires careful coordination:
Apply for Medicare 3 months before your 65th birthday through Social Security (ssa.gov or local SS office)
Determine your Medicare start date — typically the 1st of your birthday month if you enroll during the 3-month pre-birthday window
Cancel your ACA marketplace plan — log into HealthCare.gov, report turning 65 as a life event, and select your Medicare start date as the marketplace plan end date
Do not leave a gap — your ACA plan should end the day before Medicare begins; Medicare begins the 1st of your birthday month
Enroll in Medigap or Medicare Advantage if desired (see below)
Enroll in Part D if using Original Medicare + Medigap (not Medicare Advantage, which includes drug coverage)
Medigap: Your Open Enrollment Window
Medigap (Medicare Supplement) insurance fills the gaps in Original Medicare — covering deductibles, coinsurance, and in some plans, foreign travel emergency care. The most important timing consideration: Florida gives you a 6-month Medigap open enrollment window starting the month you're both age 65 AND enrolled in Medicare Part B.
During this window, Medigap insurers in Florida cannot:
Deny you coverage based on health or pre-existing conditions
Charge you more based on health status
Impose waiting periods for pre-existing conditions
After this window closes, insurers can medically underwrite — meaning you may be denied or charged significantly more if you have health conditions. Don't miss this window.
Popular Medigap plans in Florida
Plan G: Most comprehensive; covers everything except the Part B deductible ($257 in 2026). Most popular for new Medicare enrollees post-2020.
Plan N: Similar to G with small copays ($20 office, $50 ER); lower premium
Plan F: Available only if you turned 65 before 2020; covers Part B deductible
Medicare Advantage (Part C) in Florida
Medicare Advantage plans are offered by private insurers and include all of Original Medicare's benefits, often with extras like dental, vision, hearing, and gym membership. Many Florida Medicare Advantage plans have $0 premiums, though they typically have provider networks and copays. Florida has high Medicare Advantage penetration — dozens of plans are available in most counties.
Medicare Advantage and Medigap are mutually exclusive — you choose one approach or the other.
Frequently Asked Questions
When should I enroll in Medicare in Florida?
You should enroll in Medicare during your Initial Enrollment Period (IEP) — the 7-month window that includes the 3 months before your 65th birthday month, your birthday month, and the 3 months after. Enrolling early (3 months before) gives you the earliest possible coverage start date.
What happens to my ACA marketplace plan when I turn 65?
Once you enroll in Medicare Part A or Part B, you are no longer eligible for ACA premium tax credits — and you should cancel your ACA marketplace plan. Turning 65 triggers a Special Enrollment Period to cancel your marketplace plan. Time the cancellation to align with your Medicare start date to avoid any overlap or gap.
What is the penalty for late Medicare enrollment?
The Part B late enrollment penalty is 10% of the standard premium for each full 12-month period you delayed enrollment without qualifying coverage. This penalty is permanent — it's added to your premium for as long as you have Part B. The Part A late enrollment penalty is 10% for twice the number of years you delayed.
Do I need to buy a Medigap plan in Florida?
You're not required to buy Medigap, but Original Medicare (Parts A and B) has no out-of-pocket maximum — meaning significant costs are possible in a bad year. Medigap (Medicare Supplement) plans fill those gaps. In Florida, you have a 6-month Medigap open enrollment window starting the month you're 65 and enrolled in Part B — during this window, insurers cannot charge more or deny you based on health.
Can I keep my ACA plan after enrolling in Medicare?
No. You cannot receive ACA premium tax credits once you are enrolled in Medicare. If you keep an ACA marketplace plan after Medicare begins, you must pay the full unsubsidized premium — and you cannot use the ACA plan to pay Medicare cost-sharing. Cancel your ACA plan when Medicare begins.
Approaching 65? Plan Your Medicare Transition
If you're on an ACA marketplace plan and approaching 65, we can help you plan a seamless transition to Medicare with no coverage gaps.
Licensed Florida Health Insurance Producer · NPN #21249133
He is licensed with the Florida Department of Financial Services and contracted with all major carriers in Florida.