What Is a Special Enrollment Period (SEP)?
A Special Enrollment Period (SEP) is a designated time outside the standard Medicare enrollment windows during which you can enroll in, switch, or drop Medicare coverage. SEPs are triggered by qualifying life events — and using the right SEP at the right time protects you from late enrollment penalties.
Qualifying Events That Trigger a Medicare SEP
- Losing employer or union health coverage — The most common SEP trigger. When you stop working or your employer coverage ends, you have 8 months to enroll in Part B without penalty.
- Moving to a new service area — Triggers SEPs for Medicare Advantage and Part D plans.
- Medicare Advantage plan leaves your county — Your plan stops offering coverage in your Florida area.
- Qualifying for Medicaid or Extra Help — Opens a continuous SEP for Part D changes.
- Moving to or from a skilled nursing facility or nursing home.
- Plan misrepresentation or fraud.
The Employer Coverage SEP: Florida Retirees Take Note
This is the most important SEP for Florida seniors transitioning from active employment:
If you have health coverage through your own (or your spouse's) active employment at age 65, you can delay Medicare enrollment without penalty. When that employment ends or the coverage ends, you have an 8-month window to enroll in Part B.
Critical distinction: This applies to active employment coverage. COBRA and retiree coverage do not count as employer coverage for SEP purposes. If you retire early and go on COBRA, your 8-month SEP clock starts when your active employment ends — not when COBRA ends.
General Enrollment Period: The Fallback
If you miss both your Initial Enrollment Period and any applicable SEP, you can enroll during the General Enrollment Period (GEP): January 1 – March 31 each year, with coverage starting July 1.
The downside: Late enrollment penalties apply. Every 12-month period without Part B coverage adds a permanent 10% penalty to your Part B premium. The GEP should be your last resort — contact T65Navigator immediately if you think you may have missed a deadline.