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Medicare 2026

Why Mount Vernon residents face Medicare enrollment penalties

Mount Vernon, Wash. — If you're approaching Medicare eligibility here in Skagit County, one of the most important things to understand isn't which plan to pick — it's when to sign up. Missing your enrollment window for Part B or Part D can trigger a late-enrollment penalty that follows you for years, sometimes for life.

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Key takeaways

  • The Part B late-enrollment penalty adds 10% to your monthly premium for each full 12-month period you could have had Part B but didn't, and it usually lasts as long as you have Part B.
  • The Part D penalty is roughly 1% of the "national base beneficiary premium" for each month you went without creditable drug coverage, and it's added to your Part D premium going forward.
  • You can avoid both penalties by enrolling during your Initial Enrollment Period or by keeping "creditable coverage" through an employer, union, or other qualifying source.
  • Medicare's Annual Enrollment Period runs Oct. 15 – Dec. 7, and Medicare Advantage Open Enrollment runs Jan. 1 – March 31.

The good news: these penalties are avoidable once you know the rules.

How the Part B late-enrollment penalty works

Part B covers doctor visits, outpatient care, and many preventive services. If you don't sign up when you're first eligible — and you don't have other qualifying coverage, like an employer health plan based on active employment — Medicare can charge a lifelong penalty.

The math is simple but stings: your Part B premium goes up 10% for each full 12-month period you were eligible but didn't enroll. If you delayed three years, your premium could be 30% higher — and in most cases, that surcharge stays on your bill for as long as you have Part B.

How the Part D late-enrollment penalty works

Part D is prescription drug coverage. If you go 63 or more days in a row without Part D or other "creditable" drug coverage after your Initial Enrollment Period ends, you may owe a penalty when you finally sign up.

The penalty is calculated by multiplying 1% of the "national base beneficiary premium" by the number of full months you were uncovered, then rounding to the nearest 10 cents. That amount is added to your Part D premium every month, and it can go up when the base premium rises.

What "creditable coverage" means

Creditable coverage is drug coverage that's expected to pay, on average, at least as much as standard Medicare Part D. Common examples include coverage from a current employer, a union, TRICARE, or the VA.

Your plan should send you a notice each year telling you whether your coverage is creditable. Hold on to that notice — it's your proof if Medicare ever asks why you delayed Part D.

How Mount Vernon residents can avoid penalties

Mount Vernon is in Skagit County, where residents have several Medicare Advantage and stand-alone Part D options to consider when they're ready to enroll. But before comparing plans, focus on timing:

A few 2027 numbers worth knowing

Even outside the penalty question, 2027 brings some meaningful Part D changes:

These figures apply nationally, including here in Skagit County.

Where to get help in Skagit County

If you're unsure whether you'll owe a penalty — or whether your current coverage counts as creditable — free, unbiased help is available. Washington's SHIBA program (the state's SHIP counterpart) has trained counselors who can walk through your situation with you. You can also call 1-800-MEDICARE (1-800-633-4227) or visit medicare.gov.

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 Skagit County

45% are on Medicare Advantage
(MA penetration in Skagit County)
45%
55%
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 Skagit County

By local enrollment size · informational, not a ranking
CompanyLocal enrollmentPlans offeredLocal agentsAction
UnitedHealthcareNational—Yes
Kaiser PermanenteRegional—Yes
HumanaNational—Yes
Aetna (CVS Health)National—Yes
Centene (WellCare)National—Yes
Molina Healthcare 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

How long does the Part B late-enrollment penalty last?
In most cases, the Part B penalty is added to your monthly premium for as long as you have Part B. That's why even a short delay can add up over the years.
Can I get a Part D penalty waived?
Sometimes. If you believe your previous coverage was creditable or you received incorrect information, you can request a reconsideration through the process outlined in the letter Medicare sends when it assesses the penalty. The Skagit County SHIBA office can help you prepare that appeal.
What if I had drug coverage through my job — do I still need Part D at 65?
Not necessarily. If your employer coverage is creditable, you can delay Part D without penalty. Just be sure to keep the annual notice your plan sends, and enroll within 63 days of losing that coverage to stay penalty-free.
Does the Medicare Advantage Open Enrollment Period help with penalties?
No. The Jan. 1 – March 31 window lets people already in a Medicare Advantage plan make one change, but it doesn't undo a late-enrollment penalty. The way to avoid the penalty is to enroll on time in the first place, or to maintain creditable coverage. For personalized guidance, start at medicare.gov, call 1-800-MEDICARE, or contact Washington's SHIBA program for free one-on-one counseling.
Sources & further reading
  • CMS — Medicare enrollment periods (medicare.gov)

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

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This page was last updated: September 29, 2026.

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