Lee Health’s break with UnitedHealthcare splits its Medicare patients into two very different groups. Anyone enrolled in a UnitedHealthcare or AARP Medicare Advantage plan will lose in-network access to every Lee Health hospital and physician office starting January 1, 2027. Anyone who instead holds a UnitedHealthcare or AARP Medicare Supplement policy, commonly called Medigap, keeps exactly the coverage in place today, because that product sits outside the dispute entirely.
Medicare Supplement Policies Through UnitedHealthcare or AARP Stay Untouched
Lee Health addresses the Medigap question directly in the frequently asked questions section of its own patient notice at leehealth.org/unitedhealthcare, a page the system updated September 11. Asked whether a “Medigap” or “Medicare Supplement” policy through United or AARP will still be honored after January, the health system answers without qualification: “Yes. If you have traditional Medicare and a ‘Medigap’ or ‘Medicare Supplement’ through United or AARP, we will continue to bill your supplement secondary to your Medicare. This network change between Lee Health and UnitedHealthcare will not affect your Medicare Supplement coverage.”
The distinction holds up because Medigap does not work the way a Medicare Advantage plan does. A Medigap policy pays second, behind Original Medicare, toward the deductibles and coinsurance Medicare itself leaves unpaid; it carries no network of contracted hospitals the way an HMO- or PPO-style Medicare Advantage plan does. A Fort Myers-area retiree carrying Original Medicare plus a UnitedHealthcare or AARP Medigap policy can keep seeing the same Lee Health doctors on January 1, 2027 exactly as before. The termination Lee Health announced applies to its “employer-based, individual and Medicare Advantage plans” with UnitedHealthcare, a category that, by the health system’s own definition, never included Medigap.
What Ends December 31, 2026, and What Takes Effect January 1, 2027
Lee Health is ending its Hospital Participation Agreement and its Medical Group Participation Agreement with UnitedHealthcare, effective December 31, 2026, according to the notice. Beginning January 1, 2027, every Lee Health hospital and physician location across the entire system will no longer be considered in-network for UnitedHealthcare members carrying “affected employer-based, individual or Medicare Advantage plans,” the notice states. Appointments booked through the end of 2026 do not need to be rescheduled; Lee Health says its hospitals and physicians “remain in-network with UnitedHealthcare commercial plans through December 31, 2026.” Asked whether the two sides might still reconcile, the health system answers plainly that “at this time, we do not see a path forward that would allow us to bridge our differences,” language that leaves a late reversal possible without promising one. A separate wrinkle predates this termination entirely: UnitedHealthcare currently does not include Lee Health in its Exchange or Marketplace plan network, so Marketplace enrollees are already out of network today, independent of the Medicare Advantage and employer-plan change arriving in January.
Florida Heart Associates and the Other Contracts Excluded From the Change
Not every practice carrying the Lee Health name is swept into the termination. Patients of Florida Heart Associates, a cardiology group whose locations operate under the Lee Health umbrella, keep their in-network status with UnitedHealthcare regardless of what happens to the rest of the system. Lee Health’s FAQ confirms the carve-out directly, answering a patient question about the cardiology group by stating that “these contracts are not included in the network change between Lee Health and UnitedHealthcare.” The distinction is easy to miss for someone who assumes every Lee Health-branded office shares one insurance status, and it is exactly the kind of detail that decides whether a February 2027 cardiology follow-up gets billed at in-network rates or not.
The Out-of-Pocket Risk for a Retiree Who Stays Out of Network
Lee Health’s notice is direct about the financial exposure facing a UnitedHealthcare Medicare Advantage member who keeps getting non-emergency care at a Lee Health hospital or physician office after January 1, 2027: the patient “may face higher out-of-pocket costs or other coverage limitations.” Medicare Advantage plans typically apply steep out-of-network cost-sharing, or exclude non-emergency out-of-network care from coverage altogether, unless a specific exception applies. Two exceptions carry real weight for a retiree in Fort Myers, Cape Coral or the rest of Lee County deciding whether to switch doctors, switch plans, or wait. Federal law requires emergency care to be covered regardless of network status, so a trip to a Lee Health emergency department after January 1 does not carry the same financial exposure as a scheduled visit. Separately, patients who are pregnant or undergoing complex or critical chronic-illness treatment, among others Lee Health names, may qualify to keep seeing a Lee Health provider at the in-network rate for a limited time through UnitedHealthcare’s Continuity of Care process. Outside those two carve-outs, a retiree who keeps a standing relationship with a Lee Health cardiologist, orthopedist or primary care physician and takes no action before January 1 is the one absorbing the difference in cost.
A Medicare Advantage Switch Window Opens the Same Month the Network Changes
The timing overlaps in a way that matters for enrollees who decide to act rather than wait. The Centers for Medicare & Medicaid Services runs a Medicare Advantage Open Enrollment Period every year from January 1 through March 31, open only to people already enrolled in a Medicare Advantage plan, according to the agency’s own enrollment-period fact sheet. During that window, a current Medicare Advantage member may make one plan change: switching to a different Medicare Advantage plan, or dropping it to return to Original Medicare, with the change taking effect the first day of the following month. For a Lee Health patient whose UnitedHealthcare Medicare Advantage plan goes out of network on January 1, 2027, that three-month window is the next formal opportunity to act without waiting for the fall Annual Enrollment Period. Lee Health’s own notice points affected members toward reviewing “Medicare coverage options, including during Medicare Open Enrollment,” and toward CMS’s 1-800-MEDICARE line for plan-specific questions.
When a Hospital System Leaves a Plan Network
A network notice explains what is ending; it does not hand a patient a way to work through what comes next. The dates, the exceptions and the plan-comparison steps a Lee Health patient now needs are scattered across a web page, a letter and a phone call to a plan’s member-services line, with no single place to line them up side by side.
The 2027 Medicare Open Enrollment Decision Kit is a 42-page decision kit built around a cost calculator spreadsheet that compares plans on cost, drugs and doctors, a prescription-by-plan comparison, a provider call script and the Open Enrollment calendar…