Medicare Advantage Special Election Periods

When You Can Switch Outside Open Enrollment

The Annual Enrollment Period (October 15–December 7) and the Medicare Advantage Open Enrollment Period (January 1–March 31) are the standard windows for changing plans. But specific life events trigger Special Election Periods that let your parent switch Medicare Advantage plans—or leave Medicare Advantage entirely—at other times during the year.

Each SEP has its own qualifying event, timeline, and coverage options. Missing the window means waiting for the next standard enrollment period, which can leave your parent stuck in an unsuitable plan for months.

The Most Common Special Election Periods

Plan exits or your parent moves out of the service area. When a Medicare Advantage plan ends its contract with Medicare, or Medicare and the plan agree to end it, the SEP starts 2 months before the contract ends and ends 1 full month after it ends. If the plan's contract isn't renewed, the SEP runs from December 8 through the last day of February. If your parent permanently moves outside the plan's service area, the SEP begins when they move and continues for 2 full months after the move; if they tell the plan before moving, it can begin the month before the move. In any of these cases, they can join another plan or return to Original Medicare.

Loss of employer or union coverage. If your parent was delaying Medicare enrollment because of active employer coverage and that coverage ends, they qualify for both a Part B Special Enrollment Period (8 months) and a SEP to enroll in a Medicare Advantage plan. The employer coverage must have been through active employment—COBRA and retiree plans don't qualify.

Institutional care. A parent who moves into, resides in, or moves out of a skilled nursing facility, long-term care facility, or other institution can join, switch, or drop coverage while living there and for 2 full months after the month they move out. This is critical for families navigating long-term care transitions—your parent isn't locked into a plan that doesn't serve them well in a facility setting.

Dual-eligible (Medicare + Medicaid). Parents who have Medicare and Medicaid or receive Extra Help can change their Medicare drug coverage once per calendar month; this can include dropping a Medicare Advantage plan with drug coverage and returning to Original Medicare with a standalone Part D plan. Parents with full Medicaid can also join or switch to an integrated Dual Eligible Special Needs Plan (D-SNP) when one is available.

Plan or CMS contract violation. If your parent's Medicare Advantage plan materially misrepresented its benefits, violated its contract terms, or provided misleading information, CMS may grant a SEP. This includes situations where the plan's provider directory was inaccurate—listing doctors who don't actually participate in the network.

Chronic condition SEP. Beneficiaries with certain severe or disabling chronic conditions (diabetes, ESRD, chronic heart failure, dementia, and others on the CMS-designated list) can use a special-needs-plan SEP to enroll in a Chronic Condition Special Needs Plan (C-SNP) at any time. This doesn't help with switching to standard plans, but it provides access to plans specifically designed for complex chronic care management.

Using a SEP to Leave Medicare Advantage

A SEP lets your parent drop Medicare Advantage and return to Original Medicare with a standalone Part D plan. But the SEP alone doesn't guarantee the ability to buy Medigap without medical underwriting—that depends on whether the qualifying event also triggers Medigap guaranteed-issue rights.

Plan termination in your parent's area does trigger federal Medigap guaranteed-issue rights for Plans A, B, C, D, F (if eligible), and G. A move out of the service area typically triggers the same protections. But not every SEP-qualifying event comes with Medigap guaranteed-issue attached.

If your parent is using a SEP to leave Medicare Advantage but doesn't have guaranteed-issue rights, they'll face medical underwriting for Medigap in 31 states. The decision to return to Original Medicare without Medigap means accepting the 20% Part B coinsurance and hospital deductibles out of pocket—unless your state provides additional protections.

Don't Wait to Act

SEP windows are strict. Each qualifying event has its own start and end dates, and once the window closes, the opportunity is gone until the next standard enrollment period or another qualifying event. Document the triggering event—save the plan termination letter, the employer coverage end date, or the facility admission paperwork—and file the enrollment change as early in the window as possible.

SHIP counselors can help verify whether your parent qualifies for a SEP and navigate the enrollment process at no cost.

Our Medigap vs Medicare Advantage guide covers every guaranteed-issue scenario, switching timeline, and cost comparison to help your family decide whether a Special Election Period is the right moment to change your parent's coverage path.

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