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Medicare 2026

Livermore Medicare checklist: what to review and change before the Dec. 7 deadline

LIVERMORE, Calif. — The Medicare Annual Enrollment Period is open through Dec. 7, and anything you change now takes effect Jan. 1, 2027. If you are on Medicare in Livermore, this is the once-a-year window when you can switch how your coverage is set up — not just which plan you have, but what kind of plan it is.

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Key takeaways

  • The Annual Enrollment Period runs Oct. 15 through Dec. 7, and your choices take effect Jan. 1, 2027.
  • You can switch between Original Medicare and Medicare Advantage, change Advantage plans, or join, drop or change a Part D drug plan.
  • Livermore is in Alameda County, where plan availability is set at the county level — compare any plan using your own doctors and prescriptions.
  • For 2026, Part D has a $2,100 out-of-pocket cap and a maximum deductible of $615; the Medicare Prescription Payment Plan lets you spread drug costs across the year.
Older couple opening letter at home autumn in Livermore — illustrating this Medicare guideMedicare 2026Livermore, CA
Photo: Sagar Ahire Photo by Sagar Ahire on Pexels
Key facts: Medicare in Livermore, California (data as of 2026-06-01)
FactFigureSource
Medicare Advantage plans offered in Alameda County (2026)37CMS
Medicare Advantage plans offered in Alameda County (2027)32CMS
Plans not returning for 2027 / new for 202710 / 5CMS
Organizations offering Medicare Advantage in Alameda County (2026)12CMS
Share of eligible beneficiaries in Medicare Advantage, Alameda County53%CMS
Residents age 65 and older, Alameda County254,161U.S. Census Bureau
Part B standard monthly premium (2026)$202.90Medicare.gov
Part D out-of-pocket cap (2026)$2,100CMS
Part D out-of-pocket cap (2027)$2,400CMS
Annual Enrollment Period (for 2027 coverage)October 15 – December 7, 2026Medicare.gov
Medicare Advantage Open Enrollment PeriodJanuary 1 – March 31Medicare.gov

Area counts are for the county as a whole and are not a recommendation of any plan. Program figures are set nationally.

This fall also brings a notable shift on the drug side: in 2026, Part D out-of-pocket costs are capped at $2,100 for the year, a figure worth keeping in mind as you compare your options for 2027.

What is the Medicare Annual Enrollment Period deadline in Livermore?

The deadline is Dec. 7. The Annual Enrollment Period (AEP) runs Oct. 15 through Dec. 7 every year, and any change you make during that window starts Jan. 1 of the next year — so decisions made this fall shape your 2027 coverage.

If you miss Dec. 7, your current coverage simply rolls into 2027 as-is, with whatever changes your plan has already announced in its Annual Notice of Change.

What can I actually change during AEP in Livermore?

During AEP you can make any of the following changes, and they all take effect Jan. 1, 2027:

One important note: AEP is not the main window for buying or switching a Medigap (Medicare Supplement) policy. Medigap has its own rules, and in California those rules include a yearly "birthday rule" opportunity. If Medigap is on your mind, call 1-800-MEDICARE or check medicare.gov for how and when you can apply.

How should Livermore residents decide what to review?

Start with the Annual Notice of Change (ANOC) your current plan mailed you in late September. That document shows what is changing for 2027 — premium, deductible, drug tiers, provider network, and extras. Even if you like your plan, the plan itself may be different next year.

Then make two short lists before you compare anything:

With those in hand, the Plan Finder at medicare.gov can show you how each available plan would handle your specific drugs and whether your providers are in-network. Livermore is in Alameda County, and Medicare plan availability is set at the county level, so what you see reflects Alameda County's lineup.

By the numbers

Medicare Part B premium, 2006–2026

The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.

$0$50$100$150$200200820122016202020242026

Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.

By the numbers

How people get Medicare in Alameda County

53% are on Medicare Advantage
(MA penetration in Alameda County)
53%
47%
Medicare Advantage Medicare Supplement (Medigap) Original Medicare only
U.S. average

MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.

What Part D changes should I know about for 2026 and 2027?

For 2026, Part D has a $2,100 annual out-of-pocket cap on covered drugs, and plan deductibles cannot exceed $615. The old "donut hole" coverage gap was eliminated in 2025, so Part D now has three phases instead of four.

You can also opt into the Medicare Prescription Payment Plan, which spreads your out-of-pocket drug costs across monthly bills instead of paying the full amount at the pharmacy counter. It does not lower what you owe; it just smooths out the timing. Any Part D or Medicare Advantage plan with drug coverage must offer it if you ask.

Figures for 2027 are not finalized here, so compare 2027 plans using the details each plan posts during AEP.

What if I have higher income — does IRMAA apply?

If your 2024 income was above $109,000 as a single filer (or above the married-filing-jointly threshold), you may pay an Income-Related Monthly Adjustment Amount, or IRMAA, on top of your Part B and Part D premiums in 2026. Social Security sends a letter if this applies to you. If your income has dropped due to a life event like retirement or the death of a spouse, you can ask Social Security to reconsider.

What happens after December 7 in Livermore?

After Dec. 7, your 2027 coverage is locked in — with one exception. If you end up on a Medicare Advantage plan and change your mind, the Medicare Advantage Open Enrollment Period runs Jan. 1 through March 31, 2027. During that window you can switch to a different Medicare Advantage plan once, or go back to Original Medicare and add a Part D plan. That window is not open to people who stay on Original Medicare.

Key dates

Medicare enrollment periods at a glance

  • Around your 65thInitial Enrollment PeriodA 7-month window around the month you turn 65 — your first chance to sign up.
  • October 15 – December 7Annual Enrollment Period (Open Enrollment)Anyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan.
  • January 1 – March 31Medicare Advantage Open EnrollmentIf you're already in a Medicare Advantage plan, you can make one change.
  • January 1 – March 31General Enrollment PeriodFor people who missed their first chance to sign up for Part B.
  • VariesSpecial Enrollment PeriodTriggered by life events like moving or losing other coverage.

Dates are set by Medicare and apply nationwide. Confirm your personal windows at Medicare.gov or 1-800-MEDICARE.

Compare with a licensed agent

See Medicare options serving Livermore & speak with a licensed agent

Medicare Advantage companies in Alameda County

By local enrollment size · informational, not a ranking
CompanyLocal enrollmentPlans offeredLocal agentsAction
Kaiser PermanenteRegional—Yes
Scan GroupRegional—Yes
UnitedHealthcareNational—Yes
Aetna (CVS Health)National—Yes
Alignment Healthcare Usa LLCRegional—Yes
Elevance Health (Anthem)National—Yes
Enrollment data: CMS Medicare Advantage enrollment by company (county level). Listed by enrollment size, largest first — this is not a ranking, recommendation, or endorsement of any company or plan.

Provided by licensed insurance partners; MyMedicarePlans.org may be compensated. Not a ranking or endorsement of any plan.

Explore

When can you enroll? An interactive year

JFMAMJJASOND
October 15 – December 7 — anyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan. Changes take effect January 1.

Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.

Explore

The parts of Medicare

Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health care. Most people pay no premium for Part A.

Good to know

Frequently asked questions

When is the Medicare Annual Enrollment Period deadline?
The deadline is Dec. 7. The window opens Oct. 15, and any change you make takes effect Jan. 1 of the following year.
Do I need to do anything if I like my current plan?
No. If you take no action by Dec. 7, your current coverage continues into 2027. But read your Annual Notice of Change first, because the plan itself may change — premiums, drug coverage and provider networks can all shift from year to year.
Can I buy or switch a Medigap plan during AEP?
Not through AEP. Medigap has separate enrollment rules, and California also has a yearly "birthday rule" that gives you a limited window to change Medigap plans around your birthday. Call 1-800-MEDICARE or visit medicare.gov for the details that apply to your situation.
Where can I get personalized help?
Call 1-800-MEDICARE (TTY 1-877-486-2048), available 24 hours a day, 7 days a week, or use the Plan Finder tool at medicare.gov to compare plans available in Alameda County using your own doctors and prescriptions.
Sources & further reading
  • CMS — Medicare enrollment periods (medicare.gov)

For personalized answers, contact Medicare.gov or 1-800-MEDICARE.

Also for Livermore

Sources and methodology

Figures cited in this article

  • Medicare.gov: Annual Enrollment Period and Medicare Advantage Open Enrollment Period dates, and what changes are allowed during each.
  • CMS: 2026 Part D parameters, including the $2,100 out-of-pocket cap and $615 maximum deductible, and the Medicare Prescription Payment Plan.
  • Social Security Administration: IRMAA income thresholds and the process for requesting a reconsideration.

How we put this together: area counts come from the CMS files listed above for the county that contains this city, program figures come from CMS, Medicare.gov and the Social Security Administration, and no plan is ranked or recommended.

By The Medicare Desk · Published . For personalized answers, contact Medicare.gov or 1-800-MEDICARE.

Content Integrity Standards

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This page was last updated: October 2026.

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