What patients and caregivers need to know this Medicare Open Enrollment Season

The annual Open Enrollment season starts October 15 and runs through December 7th. This is the time of year when people aged 65+ can change their Medicare insurance coverage, including switching between Medicare Advantage companies and Original Medicare offered by the federal government.

You will likely see a flood of Medicare Advantage ads — thousands a day by some estimates. But behind the  promises, many hospitals are quietly saying no to these corporate plans. (Note: Government Medicare is not allowed to advertise.) The plans can be attractive: many offer low premiums plus benefits such as dental, vision and hearing coverage.

But this year, there are some important changes to look at before automatically renewing your plan, or switching away from original Medicare.

Hospitals and health systems across the country continue to end contracts with some Medicare Advantage plans.

In 2026 alone, Becker’s Hospital Review tracked more than 30 health systems dropping one or more Medicare Advantage contracts, mainly due to:

  • Prior authorization requirements
  • Denials of doctor-recommended care and
  • Delayed or inadequate reimbursement.

And lately, important new information about care denials has come to light.

A 2026 report from the Department of Health and Human Service found especially high denial rates for care people often need after a hospitalization.

For example, Medicare Advantage plans denied:

  • 54% of requests for inpatient rehabilitation
  • 65% of requests for long-term care hospital care
  • 12% of requests for skilled nursing facility care

Here’s the number that really caught our attention: when skilled nursing facility denials were appealed, 95% were overturned in favor of the patient.

Consider this:  you may be recovering from surgery or a serious illness, still weak and sitting in a hospital bed, when you’re told your Medicare Advantage plan has denied the continued care your doctor recommends. Now you have to figure out how to appeal it and advocate for more care when you feel least able to do so.

No wonder only 18% of denials are challenged!

So, while a 95% reversal may sound promising, what happens to the patients whose denials aren’t appealed?

This doesn’t mean Medicare Advantage is wrong for everyone.
But it does mean it’s worth looking carefully at how your plan works — especially if you have significant health problems or may need rehabilitation or skilled care.

 

Already have Medicare Advantage? Ask questions!

Check your doctors AND hospitals. Don’t simply ask, “Do you take Medicare Advantage?” Ask whether they will be in-network with your exact plan in 2027. Different plans from the same insurance company can have different networks.

If you see specialists or receive care from a major medical center, check them too. Several well-known systems have recently ended contracts with particular Medicare Advantage insurers, and more changes have been announced for 2027.

Review prior authorization requirements. If you have a serious or chronic condition, ask whether treatments, rehabilitation, skilled nursing, medications or other services you may need require advance approval.

Read your Annual Notice of Change. Look beyond the premium. Check deductibles, copays, drug coverage, maximum out-of-pocket costs, provider networks and supplemental benefits. What worked well in 2026 may be different in 2027.

 

Considering Original Medicare?

Original Medicare generally lets you see any doctor or hospital in the U.S. that accepts Medicare, and prior authorization is required far less often.

But there is an important consideration: original Medicare has no annual out-of-pocket maximum, so many people purchase a Medigap plan (also called a Supplement.)

Don’t assume you’ll automatically qualify for Medigap if you leave Medicare Advantage. Depending on when you enrolled, where you live and other circumstances, an insurer may be allowed to consider your health history or even decline coverage.

Before making any switch, check your Medigap eligibility first.

 

If you are considering a Medicare Advantage plan, check first to see if your preferred hospital still takes it, or has narrowed the plans they accept.

Though a growing number of hospitals and health systems have ended contracts with some Medicare Advantage insurers or sharply narrowed the plans they accept, it  does not necessarily mean a hospital has stopped accepting all Medicare Advantage plans. Network participation can vary by insurer, exact plan, location and even physician group.

Before choosing or renewing a plan, ask both your insurer and your health care providers:

“Will my doctors and hospitals be in-network with my exact Medicare Advantage plan in 2027?”

 

Following are lists of changes you may wish to consider in your decision this Open Enrollement season. Things may still change so always verify directly before making an enrollment decision.

Medicare Advantage Network Changes Already in Effect:

Health SystemState/RegionMedicare Advantage Change, as of 10/6/26
Allina HealthMNOut of network with Humana MA since 2025.
Aultman Health SystemOHHumana no longer in network; hospitals left the network in 2024, followed by physicians.
Avera HealthSDEnded Humana MA participation in 2025 and Aetna MA participation in 2026.
Baylor Scott & White HealthTXOut of network with Humana MA since 2025.
BayhealthDEEnded Humana and Cigna MA contracts in 2025.
Blessing HealthIL/MOSharply narrowed MA participation. For 2026, generally in network with BCBS Illinois, Molina, UnitedHealthcare and certain retiree plans rather than all MA insurers.
Brookings Health SystemSDStopped contracting with all Medicare Advantage plans beginning in 2024.
Brown University HealthRIHospitals and physicians are out of network with UnitedHealthcare MA.
Carson Tahoe HealthNVStopped accepting most MA plans during 2025; Prominence and Senior Care Plus were exceptions.
Centra HealthVAOut of network with Humana MA since January 2026.
CHI St. Vincent / CommonSpirit HealthAROut of network with Arkansas Blue Cross Blue Shield MA since September 2026.
CommonSpirit Health hospitalsCOOut of network with Humana MA since 2025.
Essentia HealthMN/ND/WIOut of network with Humana MA since 2025.
Great Plains HealthNEStopped contracting with Medicare Advantage plans in 2025.
Iowa Specialty Hospitals & ClinicsIANarrowed MA participation in 2026; continues Aetna, MediGold, UnitedHealthcare and Wellmark BCBS while dropping other MA plans.
Johns Hopkins MedicineMD/DCOut of network with UnitedHealthcare MA since 2025.
Kettering HealthOHOut of network with Humana and Devoted Health MA in 2026.
Kimball Health ServicesNEOut of network with all Medicare Advantage plans since Jan. 1, 2025.
Lehigh Valley Health NetworkPAOut of network with UnitedHealthcare MA since 2026.
LMH HealthKSNo longer accepts Aetna or Humana MA; continues to participate with selected other MA plans.
Mass General BrighamMAMost primary care providers are no longer in network with UnitedHealthcare or BCBS Massachusetts MA plans.
Mayo ClinicMN + national locationsOut of network with most individual UnitedHealthcare and Humana MA plans beginning in 2026; exact plan/location matters.
Memorial Healthcare SystemFLOut of network with Florida Blue MA since 2025.
MercyOneIAOut of network with Humana MA since 2025.
Moffitt Cancer CenterFLOut of network with Aetna MA since late 2025 and Humana MA since July 2026.
Montrose Regional HealthCOEnded Humana MA contract in 2026.
Mount Sinai Health SystemNYOut of network with Anthem MA since January 2026.
MUSC HealthSCHumana MA contract ended in 2025.
MultiCareWANo longer contracts with nongroup Medicare Advantage PPO plans in the Puget Sound region.
MyMichigan HealthMIOut of network with Aetna Medicare Advantage since 2025. Some employer retiree plans have special out-of-network provisions.
NKC HealthMONarrowed MA participation. Cigna MA ended in 2026 and UnitedHealthcare MA is now out of network. Humana MA remains accepted.
North Memorial HealthMNEnded Humana MA contract in 2025.
North Mississippi Health ServicesMSOut of network with UnitedHealthcare MA since 2025.
Norman Regional Health SystemOKOut of network with Aetna MA in 2026. UnitedHealthcare and Norman Regional reached a new agreement in September 2026, so UHC remains in network.
Ohio State University Wexner Medical Center / James Cancer HospitalOHOut of network with Anthem MA since 2025 and with individual Humana MA plans beginning Oct. 1, 2026. Humana Group Medicare remains in network.
Prairie Lakes Healthcare SystemSDOut of network with Humana MA since 2025.
Providence Clinical NetworkCAOut of network with UnitedHealthcare MA since January 2026.
Salem HealthOROut of network with Regence BCBS MA since 2025.
Sanford HealthMNDropped Humana MA in Minnesota in 2025.
Scripps HealthCALeft Medicare Advantage provider networks in 2024 and continues to operate outside MA networks.
South County HospitalRIOut of network with Aetna MA.
Southwestern Health Resources / UT Southwestern–Texas Health networkTXOut of network with Aetna MA since 2025.
Spartanburg Regional Healthcare SystemSCOut of network with Aetna MA since April 2026.
St. Charles Health SystemOREnded participation with Humana, Health Net and Wellcare MA. Continues to accept Original Medicare and selected other coverage.
St. Luke’s Health SystemIDNo longer accepts Humana MA as of 2026.
Trinity Health MichiganMIOut of network with Humana MA since 2025.
UNC HealthNCOut of network with Humana, Wellcare and HealthSpring/former Cigna MA plans beginning in 2026.
Uniontown Hospital / WVU MedicinePAOut of network with Highmark PA and Highmark Wholecare MA since 2025.
University of Miami Health SystemFLOut of network with most UnitedHealthcare MA plans; Preferred Care Network has temporarily remained an exception.
Vanderbilt HealthTNOut of network with BlueCross BlueShield of Tennessee MA.
VCU HealthVAOut of network with most UnitedHealthcare MA since 2025; certain D-SNP coverage is an exception.
WakeMedNCOut of network with Humana MA for most affected members and with UnitedHealthcare MA.
White River HealthAROut of network with Aetna MA and UnitedHealthcare MA in 2026.

Medicare Advantage Changes Announced for Late 2026 or 2027:

Health SystemState/RegionAnnounced Change, as of 10/6/26
CarolinaEast Medical CenterNCMedical center left BCBS North Carolina MA network July 2026; physicians remained in network. UnitedHealthcare MA scheduled to become out of network at the end of 2026.
Endeavor HealthILAetna Medicare Advantage scheduled to become out of network Jan. 1, 2027.
Fairview Health ServicesMNWill stop scheduling patients with UnitedHealthcare MA beginning Jan. 1, 2027.
Genesis HealthCare SystemOHHas notified Aetna, UnitedHealthcare, Medical Mutual and CareSource that its MA contracts will end after 2026 unless new agreements are reached.
Lee HealthFLUnitedHealthcare MA scheduled to become out of network Jan. 1, 2027.
NCH / Naples Comprehensive HealthFLWellcare and HealthSpring MA scheduled to become out of network after 2026.
NewYork-PresbyterianNYStill in negotiation. UnitedHealthcare MA coverage has been extended through Oct. 31, 2026. If no new agreement is reached, most UHC MA coverage becomes out of network Nov. 1.
Oregon Health & Science University (OHSU)ORWill no longer be in network with Regence BCBS Medicare Advantage beginning in 2027. Commercial Regence coverage is unaffected.
Sentara HealthVANegotiations with Anthem ended without agreement Oct. 5, 2026; Anthem MA is scheduled to become out of network Jan. 1, 2027.
St. Anthony Regional HospitalIAAetna MA scheduled to become out of network after 2026.
University of Miami Health SystemFLUnitedHealthcare’s Preferred Care Network MA plan is scheduled to become out of network in 2027 if a new agreement isn’t reached.

Hospitals reported to be in negotiations with Medicare Advantage Plans:

Health systemStateWhat is still unsettled as of 10/6/26
NewYork-PresbyterianNYStill negotiating with UnitedHealthcare. Current in-network coverage has been extended through Oct. 31, 2026; most UHC Medicare Advantage coverage becomes out of network Nov. 1 if no agreement is reached. (NewYork-Presbyterian)
AdventHealthMultiple statesUnitedHealthcare has terminated its contract effective Jan. 1, 2027, but AdventHealth says the parties are still working toward a new agreement. The potential change includes affected UHC Medicare Advantage coverage. (AdventHealth)
USA HealthALUnitedHealthcare negotiations have been extended. Without a new agreement, UHC commercial and Medicare Advantage members will lose in-network access at USA Health hospitals beginning in November 2026. (USA Health)
Genesis HealthCare SystemOHHas given termination notice to Aetna, UnitedHealthcare, Medical Mutual and CareSource MA plans for the end of 2026 unless new agreements are reached. (Becker’s Hospital Review)
University of Miami Health SystemFLMost UHC MA coverage is already out of network, but its Preferred Care Network arrangement remains temporarily in place and could end in 2027 without a new agreement. (Becker’s Hospital Review)
White River HealthARRemains in network with UHC Medicare Advantage through Dec. 31, 2026 while negotiations continue, but says it currently expects to be out of network Jan. 1, 2027. (White River Health)

Hospitals that have restored Medicare Advantage Participation:

Health systemStateAs of 10/6/26
Bradley Medical CenterTNParticularly good example. UnitedHealthcare had terminated its MA contract in August 2025. Bradley announced that it would rejoin UHC’s Medicare Advantage network beginning May 1, 2026. (Vitruvian Health)
UConn HealthCTReturned to Aetna’s network for both commercial and Medicare Advantage members on March 1, 2026 after having gone out of network when its prior contract expired. (Becker’s Payer Issues | Payer News)
ECU HealthNCReached a new multi-year agreement with UnitedHealthcare in August 2026 covering commercial, Medicare Advantage and Medicaid members, restoring full in-network access. (Becker’s Payer Issues | Payer News)
Memorial Hermann Health SystemTXReached a new agreement with Blue Cross Blue Shield of Texas in April 2026 that restored Medicare Advantage participation after Memorial Hermann had been out of the MA network since Jan. 1. (Houston Chronicle)
Stamford HealthCTCame within days of leaving UnitedHealthcare’s network, including MA, but reached a new agreement April 9 that preserved Medicare Advantage participation without interruption. (Stamford Health)

Again, confirm with your own research. Change is a constant!

Keep in mind…

A hospital being “out of network” does not always mean you can never receive care there. PPO plans may provide out-of-network coverage, although your costs can be considerably higher. HMO plans generally offer much less flexibility outside their network, except for emergencies and certain protected circumstances. 

Always know: Are you covered by PPO or HMO plan?

And emergency care is different: Medicare Advantage plans must cover emergency services regardless of whether the hospital is in the plan’s network.

The safest approach: Don’t rely only on an insurer’s online directory. Call your doctors and hospitals and your Medicare plan to confirm that each will be in network for your exact plan in 2027.

Q & A: Key to Your Decision – and Peace of Mind  

As hospitals reassess their relationships with Medicare Advantage, patients and families need clear information to make confident decisions. The best defense is awareness — and partnership.

Check your coverage, ask questions, and share what you learn with others who may be confused by advertising noise. By law, tradional Medicare cannot advertise, but that does not mean it’s not a good option! 

When care and insurance policies align according to personal needs, preferences and risk tolerance, patients can feel assured they have access to care with costs covered as they expect — no surprises!

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