UnitedHealthcare members whose Medicare Advantage plans are being cut back for 2027 can enroll in another UnitedHealthcare Medicare Advantage plan until Dec. 31, 2026, or they will land back in Original Medicare on Jan. 1. The insurer set out both dates in its 2027 service area reduction FAQ for providers, which says affected members were sent non-renewal notices dated Oct. 2, 2026.
What UnitedHealthcare says affected members can do
The FAQ says UnitedHealthcare will offer other plans in a member’s service area where it can, which may include other Medicare Advantage plans, Medicare supplement insurance or Part D drug coverage, depending on the market. Members can enroll in another UnitedHealthcare Medicare Advantage plan between Oct. 15, 2026, and Dec. 31, 2026, for a Jan. 1, 2027, start.
The default is blunt. Members who do not enroll in another plan, the FAQ says, “will automatically return to Original Medicare on Jan. 1, 2027.” The insurer’s public Medicare page, meanwhile, carries a different date on its banner: the Annual Enrollment Period for 2027 plans ends December 7.
Dec. 31 and Dec. 7 are different deadlines
The two dates answer different questions. Dec. 7 is the federal deadline for the fall open enrollment period, and Medicare.gov says a plan must receive the request to join by December 7 for coverage to start Jan. 1. That is the date to use for anyone who wants a plan from a different insurer without relying on a special rule.
Dec. 31 is UnitedHealthcare’s own window for members of its discontinued plans to move into another of its Medicare Advantage plans. It is not a federal enrollment deadline, and the FAQ ties it to the insurer’s own plans. A member who wants a competitor’s plan and misses Dec. 7 needs the separate special enrollment period described below.
Question for members: what happens if nothing is done?
The practical question is whether a member who got an Oct. 2 notice has picked a replacement or is about to be moved to Original Medicare without a decision. Anyone in that position needs to decide among three paths before the dates pass: another UnitedHealthcare plan by Dec. 31, a plan from another insurer by Dec. 7, or Original Medicare with a Medicare supplement policy and a stand-alone drug plan.
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The drug coverage that can vanish with the plan
For many members the largest money risk is the prescription benefit. The FAQ says that if a discontinued plan included Part D drug coverage, the member also loses those benefits in 2027, and whether drug coverage resumes depends on what the member elects. Medicare.gov’s page on special enrollment says it does not address what happens to a stand-alone drug plan that ends without a replacement.
That makes the drug list the first thing to price. Medicare’s Plan Finder shows monthly premiums, deductibles and the cost of each prescription in every plan sold in a ZIP code, for Medicare Advantage and for stand-alone drug plans alike.
A second chance after the deadlines
Members who end up in Original Medicare but want a Medicare Advantage plan still have time. UnitedHealthcare’s FAQ says they have a special election period to enroll until Feb. 28, 2027. Federal rules give a similar cushion: Medicare.gov lists a special enrollment period for a non-renewed plan that runs from Dec. 8 to the last day of February of the following year, during which a member can switch to another Medicare Advantage, Medicare drug or Medicare Cost plan.
The same page says a member who does not join another Medicare Advantage plan before the old one ends is enrolled in Original Medicare. It also gives other windows for plans that Medicare terminates or that end by agreement, which start one or two months before the contract ends. Because the federal window and the insurer’s windows differ, the date printed on the individual notice controls for a given member.
Gaps to watch in a January start
A member whose old plan included drug coverage loses it on Jan. 1 unless a new drug benefit is chosen, per the FAQ. A Medicare supplement policy is a separate purchase, and the FAQ lists such policies among the options UnitedHealthcare may offer in some markets. Pricing that route against a new Advantage plan is a comparison worth making before Dec. 31, not after Jan. 1.
UnitedHealthcare has not said in the FAQ how many members are affected, and the document does not name the counties involved. Each notice states the member’s own plan and service area.
Will the default or a decision pick next year’s plan?
The cost of inaction is plain: after Dec. 31 the default is Original Medicare, drug coverage tied to the old plan is gone, and the Dec. 7 deadline for an outside plan will already have passed. Anyone who waits for January to price the options is choosing from a shorter list.
“The Medicare Money Bundle” includes “Open Enrollment in an Afternoon: Plan Finder in one sitting, and a keep-or-switch answer” and “Medigap vs. Medicare Advantage: your Medigap rights, state rules, and both paths priced.” The Medigap guide puts the supplement route and the Advantage route side by side, which is the comparison a member with a cut plan faces.
Get the Medicare bundle to price a new plan against Original Medicare →
This article was produced with AI assistance and edited for accuracy against the sources linked above.
David M. Keller is a finance writer based in Columbus, Ohio, covering personal finance and consumer-focused economic topics. He earned his degree in journalism from Ohio University and began his career reporting on local business and economic trends for a regional media outlet. Since then, he has contributed to a variety of online publications, focusing on clear, practical coverage of topics such as cost of living, debt, and everyday financial decision-making.
