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HomeMedicare 2026IllinoisJolietThe Two Medicare Structures Available to Joliet Residents

Medicare 2026

The Two Medicare Structures Available to Joliet Residents

JOLIET, Ill. — If you're turning 65 in Joliet, or helping a parent sort through the mail piling up on the kitchen table, you've probably run into the same fork in the road every new Medicare beneficiary faces: stick with Original Medicare and add a Medigap policy, or go with a Medicare Advantage plan?

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Older couple talking with advisor in Joliet — illustrating this Medicare guide
Photo: sk Photo by sk on Unsplash

Key takeaways

  • Original Medicare + Medigap and Medicare Advantage are two different structures, not two versions of the same thing.
  • Original Medicare lets you see any provider that accepts Medicare; Medicare Advantage plans usually use networks and may require referrals.
  • Part D drug coverage has a $2,100 out-of-pocket cap in 2026 and $2,400 in 2027, with a maximum deductible of $615 in 2026 and $700 in 2027, no matter which path you choose.
  • The Annual Enrollment Period runs Oct. 15 – Dec. 7, and Medicare Advantage Open Enrollment runs Jan. 1 – March 31.

They're built differently. Knowing how each one is put together — before you look at any specific plan — makes the rest of the decision much easier.

The two structures, in plain English

Original Medicare is the federal program itself. Part A covers hospital stays, and Part B covers doctor visits and outpatient care. You can go to any doctor or hospital in the country that accepts Medicare — and most do. Original Medicare pays its share, and you're responsible for the rest, with no yearly out-of-pocket limit built in.

That last part is why many people add a Medigap (Medicare Supplement) policy. Medigap is sold by private insurers, but the plans are standardized by letter (Plan G, Plan N, and so on) so the benefits are the same from one company to the next. Medigap fills in coinsurance, copays, and deductibles that Original Medicare leaves behind. Most people who choose this route also sign up for a stand-alone Part D plan for prescription drugs.

Medicare Advantage (Part C) is different. It's an all-in-one plan from a private insurer, approved by Medicare, that replaces the way you get your Part A and Part B benefits. Most Advantage plans include Part D drug coverage and often add extras like dental, vision, or hearing. In exchange, they typically use provider networks (HMO or PPO), may require referrals to see specialists, and set their own copays and yearly out-of-pocket maximums.

How this plays out around Joliet

Joliet is in Will County, where Medicare plan availability is set at the county level. That means the menu of Medicare Advantage plans and stand-alone Part D plans you'll see on Medicare's Plan Finder depends on your ZIP code being inside Will County — not on Joliet specifically.

Original Medicare, on the other hand, works the same everywhere. A Joliet resident with Original Medicare can be treated at a Chicago hospital, a clinic in Naperville, or a specialist downstate, as long as the provider accepts Medicare. A Medicare Advantage member usually needs to stay within the plan's network, except for emergencies or urgent care.

If you split time between Illinois and another state — snowbirds, this means you — that network question matters a lot.

Costs are structured differently, too

With Original Medicare + Medigap + Part D, you generally pay:

In return, your medical bills after those premiums are usually predictable, because Medigap absorbs most of the cost-sharing.

With Medicare Advantage, you typically pay:

Neither structure is automatically cheaper. It depends on your health, your prescriptions, how often you travel, and whether you'd rather pay more up front for predictability or pay as you go.

Drug coverage: the same federal rules apply either way

Whether your drug coverage comes through a stand-alone Part D plan (the Original Medicare path) or is baked into your Medicare Advantage plan, the same federal rules apply:

Higher-income beneficiaries also pay IRMAA surcharges on Part B and Part D. For 2026, IRMAA starts above $109,000 in income for a single filer.

Switching later isn't always simple

One thing many people don't realize: moving between the two structures later in life can be harder than choosing between them at 65.

When you first enroll, you get a Medigap Open Enrollment Period — a six-month window when insurers must sell you a Medigap policy regardless of your health. Outside that window, in most states, Medigap insurers can use medical underwriting and turn you down or charge more. Illinois follows the federal baseline here.

You can switch between Medicare Advantage plans, or drop Advantage and return to Original Medicare, during:

But getting a Medigap policy after those switches may require underwriting. It's worth thinking about now, not later.

Where to get unbiased help in Joliet

You don't have to figure this out alone, and you shouldn't rely on a TV ad to do it for you. Free, unbiased help is available through:

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 Will County

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

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Medicare Advantage companies in Will County

By local enrollment size · informational, not a ranking
CompanyLocal enrollmentPlans offeredLocal agentsAction
HumanaNational—Yes
Aetna (CVS Health)National—Yes
UnitedHealthcareNational—Yes
Blue Cross Blue Shield (HCSC)Regional—Yes
Centene (WellCare)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

Can I have both Medigap and Medicare Advantage at the same time?
No. Medigap only works with Original Medicare. If you're enrolled in a Medicare Advantage plan, it's actually illegal for someone to sell you a Medigap policy. You have to choose one path.
Do I need a separate Part D plan with Medicare Advantage?
Usually not. Most Medicare Advantage plans include prescription drug coverage. If you go with Original Medicare and Medigap, you'll typically add a stand-alone Part D plan separately.
What if I miss the Annual Enrollment Period?
For most people, the next chance to change coverage is the Medicare Advantage Open Enrollment Period from Jan. 1 to March 31, which lets Advantage members switch plans or return to Original Medicare. Special Enrollment Periods also exist if you move, lose other coverage, or have certain life changes.
Where can Joliet residents get in-person help?
Illinois SHIP counselors offer free, unbiased guidance and can walk you through your options one-on-one. You can find local counselors through the state's SHIP program or by calling 1-800-MEDICARE for a referral.
Sources & further reading
  • CMS — Medicare basics (medicare.gov)

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

Also for Joliet

Content Integrity Standards

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This page was last updated: September 29, 2026.

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