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HomeMedicare 2026MissouriWebster GrovesMedicare open enrollment 2026: your Webster Groves deadline guide

Medicare 2026

Medicare open enrollment 2026: your Webster Groves deadline guide

WEBSTER GROVES, Mo. — Medicare's Annual Enrollment Period opens Wednesday, Oct. 15, and runs through Sunday, Dec. 7. For the roughly seven weeks in between, people with Medicare in Webster Groves can review their coverage for 2027, switch plans, or move between Original Medicare and Medicare Advantage. Any changes you make take effect Jan. 1.

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2027 PLAN ALERT

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Annual Enrollment: Oct 15 – Dec 7

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BEFORE YOU ENROLL

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  • Your doctors — confirmed in-network for 2027
  • Your prescriptions — checked against the plan's 2027 drug tiers
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Reading mail at kitchen table in Webster Groves — illustrating this Medicare guide
Photo: LOGAN WEAVER | @LGNWVR Photo by LOGAN WEAVER | @LGNWVR on Unsplash

Key takeaways

  • The Annual Enrollment Period runs Oct. 15 through Dec. 7, 2026, with new coverage starting Jan. 1, 2027.
  • The Part D out-of-pocket cap is $2,100 in 2026 and $2,400 in 2027. The maximum Part D deductible a plan can charge is $615 in 2026 and $700 in 2027.
  • You can switch between Original Medicare and Medicare Advantage, change drug plans, or join a plan for the first time during this window.
  • Free, unbiased help is available from Missouri's SHIP (called CLAIM) and from 1-800-MEDICARE.

This is the one window each year when almost every kind of Medicare change is on the table — and it lands as a few important program-level numbers are shifting for 2027.

What you can actually do between Oct. 15 and Dec. 7

The Annual Enrollment Period, sometimes called AEP or fall open enrollment, is broad on purpose. During these dates you can:

Whatever you choose during this window starts Jan. 1, 2027. If you make more than one change before Dec. 7, the last choice is the one that counts.

Why 2027 is a year to actually look

Even if you like your current coverage, 2027 brings changes worth checking against your own situation.

The Part D out-of-pocket cap is $2,100 in 2026 and $2,400 in 2027. Once your covered drug spending hits that limit, you pay nothing for covered prescriptions for the rest of the year. The maximum Part D deductible a plan can charge is $615 in 2026 and $700 in 2027.

The old coverage gap — the "donut hole" — is gone. Part D now has three phases: deductible, initial coverage, and catastrophic. If paying for medications in big chunks is hard on your budget, you can also ask your plan about the Medicare Prescription Payment Plan, which spreads your drug costs into monthly bills across the year at no extra charge.

Higher-income beneficiaries should also know that IRMAA surcharges on Part B and Part D begin above $109,000 in income for a single filer in 2026.

How Webster Groves fits in

Webster Groves is in St. Louis County, and Medicare Advantage and Part D plan choices are set at the county level. That means every household here sees the same menu of plans as neighbors elsewhere in the county — but the plan that fits best still depends on your doctors, your prescriptions, and your budget.

Every fall, insurers can add plans, drop plans, change drug formularies, adjust provider networks, and change what they charge. Your "Annual Notice of Change" (ANOC) letter, which arrives in September, lays out what's different about your current plan for 2027. It's worth reading before you shop. The 2027 plan lineup is also detailed in each plan's ANOC and on Medicare.gov's Plan Finder.

A simple checklist before Dec. 7

Where to get unbiased help in Missouri

You don't have to sort this out alone, and you don't have to talk to an insurance agent to get answers.

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 St. Louis County

58% are on Medicare Advantage
(MA penetration in St. Louis County)
58%
42%
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.

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 PeriodAnyone 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.

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See Medicare options serving Webster Groves & speak with a licensed agent

Medicare Advantage companies in St. Louis County

By local enrollment size · informational, not a ranking
CompanyLocal enrollmentPlans offeredLocal agentsAction
UnitedHealthcareNational—Yes
Aetna (CVS Health)National—Yes
Lumeris Group Holdings CorporationRegional—Yes
HumanaNational—Yes
Elevance Health (Anthem)National—Yes
Devoted Health IncRegional—Yes
Enrollment data: CMS Medicare Advantage enrollment by company (county level). Figures shown are illustrative sample data pending the current CMS file. 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

What happens if I miss the Dec. 7 deadline?
If you're already in a Medicare Advantage plan, you'll have a second window from Jan. 1 through March 31 (the Medicare Advantage Open Enrollment Period) to switch to a different Advantage plan or return to Original Medicare. Outside of that, you generally need a Special Enrollment Period — triggered by life events like moving or losing other coverage — to make changes.
Do I need to do anything if I want to keep my current plan?
Usually no. Most plans renew automatically on Jan. 1. But because premiums, drug lists, and networks can change year to year, it's still smart to read your ANOC and confirm the plan still fits.
Can I change my Medigap (Medicare Supplement) plan during this window?
The Oct. 15–Dec. 7 window is for Medicare Advantage and Part D. Medigap has its own rules, and outside your initial six-month Medigap open enrollment, insurers in Missouri can use medical underwriting. Call CLAIM or 1-800-MEDICARE before you drop a Medigap policy.
When does my new coverage start?
Any plan change you make between Oct. 15 and Dec. 7, 2026, takes effect Jan. 1, 2027. For the official rules, deadlines, and the plan comparison tool, visit **medicare.gov** or call **1-800-MEDICARE**. For free local counseling in Webster Groves, contact **CLAIM at 1-800-390-3330**.
Sources & further reading
  • CMS — Medicare enrollment periods (medicare.gov)

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

Also for Webster Groves

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This page was last updated: October 7, 2026.

Medicare plans in your area changing for 2027 — check yoursCall