Long before any Medicare Advantage member gets a letter about their plan disappearing, the insurer running that plan has already told the federal government its decision. Federal regulation requires a Medicare Advantage organization to notify the Centers for Medicare & Medicaid Services in writing by the first Monday in June if it won’t renew its contract for the following year. Enrollees themselves don’t have to be told anything until months later.
The First Monday in June: A Second, Earlier Deadline
The requirement sits in the same regulation that sets the enrollee notice rule, 42 CFR 422.506, but it’s a distinct obligation aimed at a different audience. Paragraph (a)(2)(i) requires the insurer to notify “CMS in writing, by the first Monday in June of the year in which the contract would end.” That’s separate from, and comes well before, the requirement in paragraph (a)(2)(ii) that each affected enrollee get a mailed notice at least 90 calendar days before the plan actually ends. For a contract ending December 31, the CMS notification lands in early June while the member-facing letter doesn’t have to go out until roughly early October, a gap of about four months between when the government finds out and when the people actually covered by the plan do.
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Why the Government Needs a Head Start
A four-month gap between the CMS filing and the member notice isn’t an oversight; it reflects how much has to happen in between. Once CMS knows a plan is leaving, it has to account for that in the broader Medicare Advantage landscape for the coming plan year, including how the affected service area’s remaining options compare and what enrollees will need to be told about alternatives. The enrollee notice itself, required under (a)(2)(ii), has to include a CMS-approved description of the other Medicare Advantage, Medicare Advantage prescription drug, or standalone Part D plans available in that person’s region, information that has to be assembled and approved before it can go out. The June filing effectively starts a federal review clock that the October mailing depends on. That kind of coordination, matching a departing plan’s enrollees against every alternative Medicare Advantage, Medicare Advantage prescription drug, and standalone Part D option available in that same service area, isn’t something CMS or the departing insurer can assemble overnight, which is part of why the regulation gives the government a running start measured in months rather than weeks.
A Two-Year Consequence Written Into the Same Rule
The regulation doesn’t just require early notice; it attaches a real cost to walking away from a Medicare Advantage contract. Under paragraph (a)(3), if an organization doesn’t renew a contract, CMS may deny that organization’s application for a new contract or a service area expansion for two years afterward, unless CMS determines special circumstances warrant an exception. The same section extends that two-year restriction to certain owners, board members, and others connected to the nonrenewing organization. In other words, the June notification isn’t just a courtesy heads-up to CMS; it’s the trigger for a rule that can keep an insurer, or people closely tied to it, out of new Medicare Advantage territory for two full years. For an insurer weighing whether to exit a market, that two-year lockout is a real deterrent against walking away lightly: re-entering that market, or expanding into new counties elsewhere, is off the table for two full enrollment cycles even if the company’s finances turn around well before then.
What the Gap Means for the Member’s Calendar
For the enrollee stuck on the receiving end of this timeline, the four-month lag between the CMS filing and their own notice doesn’t shrink the amount of time they get to act once they’re told. Medicare’s Open Enrollment runs October 15 through December 7 every year, the standard window for anyone with Medicare to pick new coverage for the following January 1. On top of that, Medicare’s own guidance on Special Enrollment Periods confirms that when a Medicare Advantage contract isn’t renewed, affected enrollees also get a dedicated Special Enrollment Period running from December 8 through the last day of February, separate from and stacked on top of standard Open Enrollment. A member notified in early October, months after CMS already had the insurer’s decision on file, still has both windows available, and if neither is used, is automatically moved into Original Medicare rather than left uninsured.
Why the Lag Still Matters
None of this means the process is broken or that members are being kept in the dark past what the law allows; every deadline described here is the one the regulation sets, and the enrollee-facing notice still arrives with enough runway to act. What the June-to-October gap shows is that the decision itself is made and reported to the federal government long before it becomes a personal, printed letter in someone’s mailbox. Anyone whose Medicare Advantage plan disappears at year-end is finding out about a choice their insurer made known to CMS as early as the first week of June, four months before the news reaches them directly.
This article was produced with AI assistance and reviewed by a human editor. Figures are linked to their primary sources; where a claim could not be verified from the public record, we say so.
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