3.8M Lose Medicare Advantage: Act by Dec. 7

If your Medicare Advantage plan is ending, this is not a year to let open enrollment slide. At least 3.8 million enrollees are losing their plan for 2027, and 181 counties will have no Medicare Advantage plan at all, according to the October 2026 roundup of CMS plan data reported this month. Open enrollment runs October 15 through December 7, 2026, for coverage starting January 1, 2027. I have helped family members through this exact scramble, and the people who do well are the ones who start with their drugs and their doctors, not with the premium on the mailer.

First, find out whether you even have a plan next year

Check the annual notice of change that arrived this fall, and any separate letter saying your plan is ending. If your plan is ending, you get a chance to choose a new one, but you do not get to keep the old one by doing nothing. If your plan continues, doing nothing renews it, which is safe only if the premium, network, and drug list still fit. The October reporting put the scale plainly: 3.8 million people displaced is not a niche problem, and in those 181 counties with no Advantage plan, the fallback is Original Medicare plus a stand-alone Part D drug plan, chosen inside the same December 7 window. Start this week, because the good local help, including free State Health Insurance Assistance Program counselors, books up in November every year.

The 2027 numbers that change your real cost

Part D standard amounts rise in 2027. Source: CMS 2027 plan data via CHANCES and October 15, 2026 reporting.

Two Part D figures move against you in 2027. The yearly out-of-pocket cap for covered prescriptions rises to $2,400, from $2,100 in 2026, and the maximum standard deductible rises to $700, from $615, according to CMS figures reported October 15. Insulin stays capped at $35 a month for covered insulin. A federal program that helped hold down stand-alone Part D premiums is ending in 2027, so check your new premium even if nothing else changed. Against that, Social Security checks rise 3.6 percent in January 2027, with the average retirement check going from $2,095 to about $2,170 a month, an increase of about $75, according to the Social Security Administration announcement on October 14. The 2027 Part B premium had not been announced as of October 15, so leave room in the budget instead of spending the whole COLA raise in your head.

My three-check routine before I pick any plan

First, drugs: enter every prescription, dose, and pharmacy into the Medicare Plan Finder and compare total yearly drug cost, not the premium alone. Second, doctors: confirm your primary doctor, specialists, and hospital are in network for 2027 specifically, because networks reset each year. Third, the bad-year test: add the premium, the deductible, and what a hospital stay or a new brand-name drug would cost under each finalist plan. The cheapest premium loses that test more often than people expect. If you are switching away from Advantage to Original Medicare, remember the Medigap trap flagged in the enrollment guides: outside protected windows, insurers in many states can use medical underwriting for a supplement policy, so ask about that before you cancel anything. This is general information, not personal advice, but the December 7 deadline is personal for everyone whose letter says their plan is ending.

FAQ

How many people are losing a Medicare Advantage plan for 2027? At least 3.8 million enrollees, according to October 2026 reporting on CMS plan data, and 181 counties will have no Medicare Advantage plan at all.

What is the Medicare open enrollment deadline for 2027 coverage? December 7, 2026. Changes take effect January 1, 2027. Advantage members get a further January 1 to March 31, 2027 window to make one change.

What are the 2027 Part D cap and deductible? The out-of-pocket cap for covered drugs is $2,400 in 2027, up from $2,100, and the maximum standard deductible is $700, up from $615, per CMS figures reported in October 2026.

How big is the 2027 Social Security raise? 3.6 percent, announced October 14, 2026. The average retirement check rises from about $2,095 to about $2,170 a month, roughly $75 more.