Millions of Americans enrolled in private Medicare plans are facing an important change before the year ends, and three major insurance companies account for a substantial share of those affected.
UnitedHealth Group, Humana, and CVS Health are among the insurers ending certain Medicare plans on December 31, 2026, according to an October 27 KFF analysis.
The KFF analysis of federal Medicare enrollment and plan data estimates that about 4.3 million beneficiaries are enrolled in private plans scheduled to end at year’s end.
But there’s an important distinction: these Americans are not losing their Medicare eligibility. Their particular private plans are ending.
For older Americans and families helping relatives manage important paperwork, the announcement brings another task to the year-end calendar.
What the 4.3 Million Figure Actually Means
The headline number covers two categories of private Medicare plans. KFF found that approximately 3.1 million people are enrolled in Medicare Advantage plans that include prescription drug coverage and are scheduled to end December 31.
Another 1.2 million are enrolled in stand-alone Part D drug plans that will also be terminated. Within the Medicare Advantage group, around 2.8 million people are in plans available for general enrollment, while approximately 300,000 are in special needs plans.
These figures come from KFF’s examination of Centers for Medicare & Medicaid Services data, including enrollment records from June 2026 and plan information for 2027.
The numbers describe affected enrollment rather than the number of individual insurance policies being discontinued. They also do not mean that all affected people live in the same states or counties.
Humana, UnitedHealth and CVS Account for Major Shares
The three companies named in the headline are among the largest insurers associated with the upcoming plan terminations. According to KFF’s insurer-by-insurer breakdown, the affected enrollment in general-enrollment Medicare Advantage plans with drug coverage includes:
- Humana: approximately 530,000 people.
- UnitedHealth Group: approximately 367,000 people.
- CVS Health: approximately 254,000 people.
Another insurer, Aware Integrated, accounts for approximately 249,000 affected members through Blue Cross-branded plans in Minnesota.
Together, these four organizations represent around half of the 2.8 million people affected in this specific Medicare Advantage category. Importantly, those percentages are not shares of the entire 4.3 million total.
The analysis also does not establish that these companies are withdrawing from Medicare everywhere. Some plans may end in particular counties while continuing to operate elsewhere.
CVS Has Another Major Change Involving SilverScript
CVS Health’s involvement extends beyond its Medicare Advantage plans. KFF estimates that approximately 950,000 people are enrolled in CVS-sponsored SilverScript Choice stand-alone drug plans scheduled to end in 13 Part D regions.
That represents about 81% of the affected enrollment in terminating stand-alone drug plans.
Another approximately 190,000 people are enrolled in HealthSpring Extra Rx plans sponsored by Health Care Service Corporation that will end in 16 regions.
These are separate figures from the Medicare Advantage counts.
The regional distinction matters because a plan being discontinued in certain areas does not necessarily mean it is disappearing nationwide.
For households already reviewing recurring expenses and comparing insurance arrangements, the broader lesson is to check the specific plan and its terms rather than assume that a familiar company name guarantees the same offering next year.
Not Every Plan Change Means a Termination
One potentially confusing part of the announcement concerns plans that are being consolidated rather than discontinued outright.
KFF identified another approximately 1.4 million Medicare Advantage members whose plans are being combined with other plans offered by the same insurers.
That group includes about 500,000 people in general-enrollment plans and 900,000 in special needs plans.
According to the original KFF findings, those members will be moved automatically into another Medicare Advantage plan offered by their insurer.
They are not included in the 4.3 million termination total. This distinction can help families understand why two people receiving notices from the same insurance company might face different administrative changes.
December 7 Is an Important Date
The timing matters because Medicare’s annual open enrollment period is already underway. According to Medicare.gov’s official open enrollment guidance, the annual enrollment window runs from October 15 through December 7.
Changes submitted and received by December 7 generally take effect January 1, 2027. The deadline is particularly relevant for people whose existing plans are scheduled to end.
For readers already tracking Medicare’s December 7 enrollment deadline, the latest KFF findings offer another reason to review official plan notices carefully.
However, December 7 is not the only possible enrollment deadline for every affected member.
Medicare’s special enrollment rules provide additional opportunities in qualifying circumstances, including certain plan nonrenewals. The specific dates depend on the type of plan change.
What Happens When a Current Plan Ends?
KFF explains that people whose Medicare Advantage plans are terminated must enroll in another available Medicare Advantage plan if they want to remain in that program. Otherwise, they generally return automatically to Original Medicare.
People whose stand-alone drug plans end must choose another qualifying plan to continue that form of coverage.
The appropriate next step depends on the notice the individual receives and the options available in their area.
For families managing paperwork across generations, the situation also highlights the importance of organizing key family documents and sharing administrative responsibilities.
Keeping plan notices, account information, and enrollment confirmations together can make it easier to follow what has changed.
How Families Can Prepare for the Year-End Changes
The KFF figures are national estimates, not a confirmed count of affected residents in any particular city or county. That means readers should not assume their plan is ending solely because their insurer appears in the national report.
The Centers for Medicare & Medicaid Services’ open enrollment guidance recommends reviewing official plan documents, including the Annual Notice of Change and Evidence of Coverage.
Households can also compare information using Medicare.gov or contact 1-800-MEDICARE.
For anyone organizing household paperwork and keeping important notices in one place, this is a useful occasion to separate documents requiring action from routine correspondence.
And when reviewing a new recurring expense, tracking household spending against an established budget provides a practical way to understand how the new arrangement fits into existing financial commitments. The essential step is verifying the status of the specific plan rather than relying on national headlines alone.
The Biggest Takeaway for Medicare Members
The coming changes are substantial, affecting about 4.3 million people whose current private plans end on December 31. But the consequences vary by insurer, plan category, and county. Some members will need to make a new enrollment decision. Others may be moved into a consolidated plan automatically.
