Every October, a subset of Medicare Advantage members opens a piece of mail unlike what most other enrollees receive that month: a notice stating that the plan will not continue into the next year and instructing the member to find new coverage. Medicare’s own guidance describes the notice in plain terms, and it is a different document from the more familiar letter that arrives to members whose plans are staying in business. Knowing which one landed in the mailbox changes what needs to happen next, and by when.
The October Non-Renewal Notice
Medicare.gov’s own page on the subject, titled the Plan Non-Renewal Notice, states that the mailing goes out in October and tells the member to look for a new plan for coverage the following year. The page does not soften the instruction with a list of alternatives already chosen; the responsibility to pick a replacement, and to do it inside the standard enrollment calendar, falls to the member.
The notice is short and specific by design. It is not meant to walk through every reason the plan is ending or to compare replacement options; its job is limited to announcing that the current plan will not exist next year and pointing the member toward the annual process every other Medicare Advantage member also goes through when picking a plan.
Two tools for a notice like this one: The 2027 Medicare Open Enrollment Decision Kit pairs the Open Enrollment calendar with a walkthrough of reading the Annual Notice of Change, the two references most useful once a plan stops renewing and a household needs to track which document applies. Open The 2027 Medicare Open Enrollment Decision Kit.
How It Differs From the September ANOC
Most Medicare Advantage members get a different letter entirely: the Annual Notice of Change. Medicare.gov’s own page on that notice says it “arrives in September each fall” and “includes any changes in coverage, costs, and more that will be effective in January,” sent by plans that are continuing to operate. The non-renewal notice, arriving a month later in October, is not a bigger version of that same letter. It comes from a plan that is not continuing at all, and its entire purpose is to send the member looking elsewhere rather than to describe what is changing within the same plan.
Mixing up the two letters is an easy mistake to make, since both arrive within weeks of each other in the same mailbox during the same season. A member who assumes an October notice is just a late ANOC, describing changes to a plan that is actually continuing, risks missing that the plan is ending altogether and skipping the search for a replacement entirely.
Why a Plan Stops Renewing
A Medicare Advantage plan’s existence depends on an annual contract between the insurer and the federal government, renewed and re-bid every year rather than granted once and kept indefinitely. Either side of that arrangement can end it: an insurer can decide a plan no longer fits its business in a given county, or the government and the insurer can simply not reach a renewed agreement. A federal enrollment-periods fact sheet treats this as a recognized category on its own, separate from a plan that is renewing with changes or one whose contract Medicare terminates outright mid-year.
The Special Enrollment Period a Non-Renewal Opens
Because a non-renewal notice can land after the general fall enrollment window has already closed, the federal government sets aside a separate window just for it. The same enrollment-periods fact sheet states that when a Medicare Advantage, Medicare drug, or Medicare Cost Plan’s “contract with Medicare isn’t renewed,” an affected member can switch plans “between December 8 and the last day in February of the following year,” months longer than the standard Annual Enrollment Period most other members use. That window exists precisely because a non-renewal notice, unlike an ANOC, is telling someone their coverage is disappearing rather than simply changing.
That same fact sheet also sets the ordinary fall Annual Enrollment Period from October 15 through December 7, with changes taking effect January 1. A member who receives a non-renewal notice in early October, before that window even opens, effectively gets extra runway: time to research replacement plans during the standard enrollment period and, if needed, keep adjusting through the end of February under the non-renewal-specific window.
What Happens If No New Plan Is Chosen
A Medicare Advantage member who ignores the notice does not get automatically placed into a similar replacement plan. Coverage under the discontinued plan simply ends on schedule, and without an active choice, a member typically defaults back to Original Medicare, without the drug coverage or extra benefits a Medicare Advantage plan usually bundles in. The notice’s instruction to find new coverage is not a formality; it is the only step standing between a member and a gap in the kind of coverage they are used to having. Original Medicare on its own also carries no annual out-of-pocket limit and no dental, vision or hearing benefits of the kind many Medicare Advantage plans include, so a member who lets the deadline pass without picking a new plan is not just changing insurers; they are potentially changing what kind of coverage they have at all.
The Gap Between a Notice and a New Plan
A non-renewal notice tells a member what is ending, not which of the other Medicare Advantage plans selling in the same county would actually cover the same drugs or keep the same doctors, and that gap is where a rushed, uninformed choice during the enrollment window can cost more than the plan that just disappeared.
The 2027 Medicare Open Enrollment Decision Kit includes a prescription-by-plan comparison and a cost calculator spreadsheet that compares plans on cost, drugs and doctors, built for exactly the side-by-side check a non-renewal notice does not provide.
Compare replacement plans against what the notice leaves out in The 2027 Medicare Open Enrollment Decision Kit.
This article was produced with AI assistance and reviewed by a human editor, based on Medicare.gov’s own notice pages.
