A UnitedHealthcare Medicare Advantage member whose plan ends on January 1, 2027 and who picks nothing lands in Original Medicare on that date. UnitedHealthcare’s 2027 service area reductions FAQ says members of discontinued plans “will automatically return to Original Medicare on Jan. 1, 2027” if they do not enroll in another plan. Those who land there get a special election period, and they may join another Medicare Advantage option until February 28, 2027.

What happens on January 1 if nothing is chosen

The company’s notices to affected members are dated October 2, 2026, and the FAQ says the changes take effect January 1, 2027, when UnitedHealthcare is “reducing some service areas and discontinuing some plans.” The FAQ does not say how many members are affected or list the counties. It says the affected plans “can vary by state and county,” and it adds that UnitedHealthcare continues to offer network-based Medicare Advantage plans, so the letter a member received is the only reliable way to tell whether a given plan is on the list.

Falling back to Original Medicare is not a pause on coverage. A member keeps Medicare, but the private plan, its network and its extras are gone. The FAQ also says members whose discontinued plan included prescription drug coverage lose that Part D coverage in 2027, and whether they get drug coverage back depends on what they choose next.

People in this spot are really asking two things: which replacement plan to pick, and whether leaving Medicare Advantage for Original Medicare brings the right to buy a Medigap policy. Both run on the same calendar, and that calendar starts with the October 2 letter.

A member holding an October 2 notice has until December 7 to line up a plan that starts January 1. The 2027 Medicare Open Enrollment Decision Kit lays out the Open Enrollment calendar and a cost calculator spreadsheet that compares plans on cost, drugs and doctors, so a UnitedHealthcare member can line up replacements before that date.

Compare replacement plans on cost, drugs and doctors with the Decision Kit →

Two windows with two different end dates

Medicare’s yearly Open Enrollment runs from October 15 to December 7. During that stretch a person can join, drop or switch a Medicare Advantage plan or a drug plan, and the change takes effect January 1. Medicare.gov says the new plan has to receive the request by December 7.

UnitedHealthcare’s FAQ describes members enrolling in a new plan between October 15 and December 31, 2026 for a January 1 start. Medicare’s own calendar closes on December 7, so December 7 is the date that holds up on both.

The second window is the backstop. A member who ends up in Original Medicare on January 1 can still join another Medicare Advantage plan through February 28, 2027, according to UnitedHealthcare. Medicare.gov says coverage under a special enrollment period generally starts the first of the month after the plan gets the request, so a request that arrives on February 28 would start March 1. Waiting leaves January and February in Original Medicare with whatever the member has arranged for drugs and supplemental coverage.

Medigap rights when a plan leaves Medicare

Medicare.gov lists “my Medicare Advantage Plan is leaving Medicare” among the situations that give a person guaranteed issue rights to buy a Medigap policy, the private supplement that pays part of what Original Medicare leaves behind. A person can apply 60 days before Medicare Advantage coverage ends and no later than 63 days after it ends. If coverage ends December 31, that count runs from about November 1 to March 4.

The right applies only to people who switch to Original Medicare rather than joining another Medicare Advantage plan. Medigap cannot start until the Medicare Advantage coverage ends, and Medicare.gov says the policies available depend on the person’s circumstances and state, with some states adding rights of their own. A state insurance department can say what applies locally.

Extra Help members get a blue notice

People who get Extra Help with drug costs and whose plan is leaving Medicare get a separate letter. Medicare.gov describes a blue notice, arriving in late October or early November, that warns the person will be reassigned to a Medicare drug plan for the coming year unless they join a new plan on their own. Medicare’s advice is to keep the notice, compare plans in the Plan Finder and join a new plan to avoid reassignment. A person can still change plans in early December.

Choosing a replacement before December 7

Medicare’s Plan Finder is the free place to start. Medicare.gov says to add every prescription drug taken regularly, confirm that doctors and pharmacies are in the plan’s network, and look at premiums, deductibles and estimated yearly drug costs rather than the premium alone. The State Health Insurance Assistance Program in each state offers free one-on-one counseling, and Medicare.gov links to it.

Gather the October 2 letter, the current plan’s member card, the drug list with doses, and the names of every doctor and specialist. Call each doctor’s office and ask whether it takes the specific plan for 2027, because the Plan Finder directory can lag behind contracts. Write down the date and the name of the person who answers.

The trap is the quiet default. A member who does nothing is in Original Medicare on January 1, has the February 28 window as the only way back to Medicare Advantage, and is on the clock for Medigap rights, which Medicare.gov says end 63 days after Medicare Advantage coverage does.

A plan that ends January 1 leaves until December 7 to choose

A member who waits past December 7 spends January and February in Original Medicare while a replacement plan is sorted out. The 2027 Medicare Open Enrollment Decision Kit puts the plans side by side in a cost calculator spreadsheet that compares plans on cost, drugs and doctors, and lays out the Open Enrollment calendar so each date is on one page. It runs 55 pages.

Line up a replacement for the January 1 plan end with the Decision Kit’s calculator and calendar →

This article was produced with AI assistance and edited for accuracy against the sources linked above.