Your Medicare Advantage Doctor Left the Network. CMS Did Not Give You a Way Out for 2027

Your cardiologist’s office calls in March. They are no longer in network with your Medicare Advantage plan. The plan did not change your premium, did not change your benefits, and as far as it is concerned nothing has happened that entitles you to anything.

Search for what to do and you will find a lot of confident writing saying that CMS fixed this for 2027 — that one doctor leaving your network now opens a Special Enrollment Period and you can switch plans mid-year.

That is wrong. CMS proposed it, took comments, and then declined to finalize it.

The short answer: there is no general Special Enrollment Period when a doctor or hospital leaves your Medicare Advantage network mid-year. CMS proposed one in November 2025 and explicitly did not finalize it in the April 2026 rule. What does exist is a narrow set of enrollment rights in federal regulation — including one that applies when a network failure actually denies you necessary care — plus the January 1 to March 31 window. Knowing which one fits is the difference between switching and waiting until October.

What CMS actually proposed, and what it did

In November 2025, CMS published its proposed rule for contract year 2027. Among the proposals was a change to how network disruptions are treated.

Under existing policy, an enrollee affected by a provider network change could qualify for a Special Enrollment Period only if CMS or the plan determined the change was significant enough. That determination sat with the agency and the plan, not the enrollee. The proposal would have removed the significance threshold, so that the Special Enrollment Period became available whenever an enrollee was affected by a provider or facility termination.

It drew broad support in comments. Hospital groups backed it. And in the final rule, published April 6, 2026 at 91 FR 17384, CMS wrote:

“In this final rule, CMS is not finalizing the proposal to establish a special enrollment period for provider terminations and are not addressing comments received on this proposal. We acknowledge the broad interest related to this topic and will continue to consider the extent to which it may be appropriate to engage in future rulemaking in this area.”

No new Special Enrollment Period. No response to the comments. An acknowledgement of interest and a deferral to future rulemaking.

The rest of that rule was substantial — it changed Star Ratings, marketing and communications, drug coverage, enrollment processes and special needs plans, applicable to coverage beginning January 1, 2027. The provider-termination SEP simply was not part of it.

Why so much coverage got this wrong

Worth understanding, because it tells you how to read the next round of Medicare news.

A proposed rule and a final rule are different documents, often five months apart, and the proposed version is the one that generates headlines. When a popular provision is dropped between the two, the correction rarely travels as far as the original.

So in October 2026 you can find articles stating plainly that the significance threshold is gone and one doctor leaving now triggers a Special Enrollment Period. Some are summarizing the November 2025 proposal without noting it was not adopted. Some are summarizing other summaries.

The practical lesson: for anything that determines whether you can change plans, the source that matters is the regulation — 42 CFR 422.62 for Medicare Advantage election periods — or the final rule in the Federal Register. Not a blog, and not us either. Both are public, and we have linked them in the sources.

What a network change does and does not entitle you to

Your plan does owe you things when its network changes. They are just not a way out.

What you are entitled to: notice of the change, continuity-of-care protections in defined circumstances such as an active course of treatment, an accurate provider directory, and the right to appeal a coverage denial. If a specific service is denied, the appeal process is real and worth using — we covered it in how to fight a Medicare Advantage prior authorization denial.

What you are not entitled to: a general right to leave the plan because a provider left it.

The structure of 42 CFR 422.62(b) explains why. It opens by saying an individual may leave an MA plan “at any time (that is, not limited to the annual coordinated election period)” under the circumstances it then enumerates. It is a closed list. Provider network changes are not on it.

Blunt version: the plan does not promise that any particular doctor will be in network for the whole year. It promises an adequate network. Those are different promises, and the second one is the one that is enforceable.

The contract-violation SEP, and when it applies

Here is the provision that actually matters when a network loss is doing you harm, and it is the one almost no article mentions. 42 CFR 422.62(b)(3):

“This SEP requires CMS approval prior to use. The individual must use a CMS-operated election mechanism, in a form and manner specified by CMS, to make an election using this SEP. To be eligible, the individual must demonstrate to CMS that — (i) The organization offering the plan substantially violated a material provision of its contract under this part in relation to the individual, including, but not limited to the following: (A) Failure to provide the beneficiary on a timely basis medically necessary services for which benefits are available under the plan. (B) Failure to provide medical services in accordance with applicable quality standards; or (ii) The organization (or its agent, representative, or plan provider) materially misrepresented the plan’s provisions in communications.”

Three features are worth drawing out.

It is about care, not convenience. Losing a doctor you like is not a contract violation. Being unable to obtain medically necessary services on a timely basis may be. If your plan’s network no longer contains anyone who can treat your condition within a reasonable distance and timeframe, that is a materially different situation from preferring your old cardiologist.

You go to CMS, not the plan. It requires CMS approval before use, through a CMS-operated election mechanism. In practice that means calling 1-800-MEDICARE, not your insurer. Your insurer has no authority to grant it and a plain interest in not telling you about it.

You carry the burden of proof. The regulation says the individual must demonstrate it. So document: the date the provider left, what you were told, every attempt to find an in-network alternative, the wait times you were quoted, the distances, and any care that was delayed as a result. A diary entry written the week it happened is worth more than a recollection in June.

The misrepresentation branch at (ii) is separate and sometimes the better fit. If a plan or an agent told you a specific hospital or doctor was in network when it was not, that is a misrepresentation of the plan’s provisions, and it is grounds in its own right.

This is a narrow door. It is not a formality, and most network changes will not clear it. But it exists, and the people who most need it are usually the ones who have never heard of it.

The five-star Special Enrollment Period

The most usable mid-year option for most people, and it has nothing to do with your network.

42 CFR 422.62(b)(15) gives you a Special Enrollment Period to join a Medicare Advantage plan from an organization with an overall rating of five stars. You may use it once for the contract year in which the plan earned the rating, from December 8 before that year through November 30 of it.

It matters more than usual this year. CMS posted the 2027 Star Ratings in early October, and 15 Medicare Advantage contracts earned an overall five stars — down from 21 a year earlier. Whether one is available in Harris County is a question with a specific answer, which is worth getting rather than assuming.

Two cautions. First, a five-star overall rating is a judgment about the organization’s measured performance, not a promise about your doctors; check the network the same way you would for any plan. Second, the 2027 ratings are built on a measure set CMS changed — it removed a number of measures in the April 2026 rule — so the star number now reflects less of the member-experience side than it used to. We looked at how to read the ratings in how Houston should judge an Advantage plan by its Star Ratings.

The Medigap trial right

If the Medicare Advantage plan you are in now is your first one, and you dropped a Medigap policy to join it, you may have a right most people do not know they are holding.

42 CFR 422.62(b)(8) covers an individual who “terminated a Medigap policy upon enrolling for the first time in an MA plan and is still in a ‘trial period’ and eligible for ‘guaranteed issue’ of a Medigap policy.” The provision “allows an eligible individual to make a one-time election to disenroll from his or her first MA plan to join original Medicare at any time of the year.” It runs from enrollment until 12 months of enrollment have passed, or until you disenroll — whichever comes first.

The important half is the guaranteed-issue Medigap right that travels with it. Outside protected windows, Medigap insurers in Texas can medically underwrite and decline you. Inside the trial period they cannot. If a network collapse has you reconsidering Medicare Advantage entirely, and you are inside that 12 months, this is likely your best available move. Our pages on Medicare Supplement plans and high-deductible Medigap cover what you would be moving to.

Check the dates carefully. It is one-time, it applies to a first MA plan only, and the 12 months run from enrollment.

Every other mid-year option, listed

The full set, from 42 CFR 422.62(b), so you can see whether anything fits.

The disaster provision at (b)(18) deserves a Houston note. It applies to people who live in an area with a federal, state or local emergency or major disaster declaration — or who rely on someone in that area for health decisions — and who had another election period available but did not use it because of the disaster. After a hurricane or a flood that produces a declaration, this is a live option, and it is routinely overlooked.

And the one that is not a Special Enrollment Period at all but solves the problem for many people: the Medicare Advantage Open Enrollment Period, January 1 to March 31. If you are in a Medicare Advantage plan on January 1, you get one change. No qualifying event, no documentation, no permission. We wrote it up in the January 1 to March 31 window that lets you undo a plan choice.

What to do in Houston, in order

If a provider has already left your network, work through this in sequence.

1. Verify it. Call the practice and the plan separately. Directories are wrong often enough that this is worth ten minutes. Ask specifically whether the practice left or whether one physician moved, because the answers lead different places.
2. Ask about continuity of care. If you are in an active course of treatment, transition protections may let you keep seeing that provider at in-network cost for a defined period. Ask in writing and keep the reply.
3. Find out whether anyone in network can actually treat you. Not whether the specialty exists in the directory — whether a specific physician is accepting new patients, how far away, and how soon. Write down what you are told and when.
4. If the answer is nobody, within a reasonable distance and time, consider (b)(3). That is the contract-violation SEP, and the route is 1-800-MEDICARE, not your plan. Bring your documentation.
5. If you were told the provider was in network when you enrolled, consider (b)(3)(ii). Misrepresentation is its own ground.
6. Check whether a five-star plan is available in your county. Eighteen contracts earned five stars for 2027. That SEP runs to November 30.
7. Check whether you are inside a Medigap trial period. If this is your first MA plan and you are within 12 months, you may be able to return to Original Medicare with guaranteed-issue Medigap.
8. If none of those fit, work out whether you can wait. AEP runs October 15 to December 7 for a January 1 change; if you are in a Medicare Advantage plan on January 1, the MA Open Enrollment Period gives you one more change through March 31.
9. Keep using the appeals process meanwhile. A denial for a specific service is appealable regardless of whether you can change plans, and the appeal clock is short.

If you are reading this before you have enrolled, the whole article collapses to one sentence: check the network, the hospital and the formulary before you sign up, because your leverage is at its maximum in October and its minimum in March. Our Houston AEP checklist has the full list.

Frequently asked questions

Talk it through with someone local

Mid-year network problems are among the hardest things to fix in Medicare, which is exactly why they are worth preventing in October. If a provider has already left your plan, the question is which narrow provision fits your facts — and that is a specific, answerable question rather than a matter of opinion.

Bring the date the provider left, what the plan told you, and what happened when you tried to find someone in network. If a rule fits, we will say so. If none does, we will tell you that too, and what your October options look like.

Call 832-400-6538 or email sara@wisehealthins.com, or read about the Medicare plans and Medicare Advantage options we work with. We serve clients from North Houston and South Houston.

This article is for general information and is accurate as of October 7, 2026. It is not medical, tax or legal advice, and it is not a substitute for a determination by CMS. Eligibility for any Special Enrollment Period depends on your individual circumstances and, where the regulation requires it, on CMS approval. Plan networks and availability vary by plan and county. Talk to a licensed agent, or call 1-800-MEDICARE, before relying on any enrollment right described here.