When you can enroll, change, or drop Medicare coverage.
Medicare gives you several windows to enroll and switch coverage. Knowing which window applies to you, and when it opens, is the key to avoiding gaps, penalties, and missed opportunities.
Independent licensed Florida insurance agents · No cost or obligation · Monday through Friday, 9 a.m. to 6 p.m. Eastern Time
Speak with an independent licensed Florida insurance agent
Call to discuss Medicare Supplement options that may be available in Florida.
Monday–Friday, 9 a.m.–6 p.m. ET
Calls are recorded. No obligation to enroll.
Enroll on time. Most Medicare late penalties are permanent.
Key Points
- Your Initial Enrollment Period spans seven months around your 65th birthday.
- Missing a window can cause gaps in coverage and permanent late penalties.
- Special Enrollment Periods apply after qualifying life events like losing employer coverage.
- Medigap Open Enrollment is your best window to buy a Medicare Supplement with no medical underwriting.
Enrollment windows at a glance
Enrollment windows at a glance
65+
65th birthday
Parts A & B begin
IEP
Initial Enrollment
7 months around 65
AEP
Annual Enrollment
Oct 15, Dec 7
OEP
Open Enrollment
Jan 1, Mar 31
SEP
Special Enrollment
Qualifying life events
- 1
65+ · 65th birthday
Parts A & B begin
- 2
IEP · Initial Enrollment
7 months around 65
- 3
AEP · Annual Enrollment
Oct 15, Dec 7
- 4
OEP · Open Enrollment
Jan 1, Mar 31
- 5
SEP · Special Enrollment
Qualifying life events
Every Medicare enrollment period, compared
Each has different rules, timing, and consequences. Plan ahead.
Initial Enrollment Period (IEP)
The seven-month window around your 65th birthday
Spans the three months before your 65th birthday month, includes the birthday month, and ends three months after. The earliest you enroll, the sooner coverage begins.
General Enrollment Period (GEP)
January 1 to March 31 each year
If you missed your IEP and lack credible coverage, you can enroll during the GEP. Coverage begins the month after you enroll. Late enrollment penalties may apply.
Special Enrollment Period (SEP)
Anytime after a qualifying life event
Triggered by events like losing active employer coverage, moving out of a plan service area, or losing Medicaid. SEPs avoid late penalties when qualifying coverage was maintained.
Medigap Open Enrollment
Six months after you turn 65 and enroll in Part B
The best time to buy a Medigap plan: guaranteed access to any plan available in your state with no medical underwriting in most states. Plan around your Part B start month.
If you retire at 67 and drop employer coverage
Losing active employer coverage triggers a Special Enrollment Period. You get eight months to enroll in Part B without a late penalty, and you avoid waiting for the General Enrollment Period. Ask the employer plan for proof you lost coverage, and keep it for your records.
Frequently asked questions
Short, direct answers about Medicare enrollment periods.
Speak with an independent licensed Florida insurance agent about Medicare Supplement
No cost or obligation. Monday through Friday, 9 a.m. to 6 p.m. Eastern Time.
Reviewed by the Policy Help Desk Editorial Team. Last reviewed August 2026.