Medicare 2026

Part B and Part D Enrollment Windows for Eugene Medicare

EUGENE, Ore. — If you're approaching Medicare age here in Eugene, one of the most important things to understand isn't which plan to pick — it's when to sign up. Miss the right window for Part B or Part D, and you could pay a penalty tacked onto your premium for as long as you have Medicare. The good news: these penalties are avoidable once you know how they work.

Why late-enrollment penalties exist

Medicare is designed so that people join when they first become eligible, usually around their 65th birthday. When folks delay signing up without other qualifying coverage, Medicare charges a lifetime penalty to keep the system fair for everyone paying in. The penalty isn't a one-time fee — it's added to your monthly premium, month after month, for as long as you're enrolled.

There are two penalties to know about: one for Part B (doctor visits and outpatient care) and one for Part D (prescription drugs).

How the Part B late penalty works

If you don't sign up for Part B when you're first eligible — and you don't have other creditable coverage, like a group health plan through current employment — you may owe a Part B late penalty.

Here's the math, straight from Medicare: your monthly premium goes up 10% for each full 12-month period you could have had Part B but didn't. So if you waited three years, your premium could be 30% higher. And that increase generally sticks with you for life.

Your Initial Enrollment Period runs for seven months — the three months before your 65th birthday month, the month itself, and the three months after. If you miss it, the General Enrollment Period runs January 1 through March 31 each year, with coverage starting the month after you sign up.

How the Part D late penalty works

The Part D penalty applies if you go 63 or more days in a row without Part D or other creditable prescription drug coverage after your Initial Enrollment Period ends.

Medicare calculates the penalty by multiplying 1% of the "national base beneficiary premium" by the number of full months you went without coverage. That amount is then rounded and added to your monthly Part D premium — again, typically for as long as you have Part D.

One thing worth knowing: creditable coverage from an employer, union, VA benefits, or TRICARE can protect you from this penalty. If you have drug coverage from another source, keep the letter that says it's "creditable." You may need it later.

A local snapshot: what Eugene retirees should know

Eugene is in Lane County, where Medicare beneficiaries have a range of Original Medicare, Medicare Advantage, and stand-alone Part D options to consider during enrollment windows. The penalty rules, though, are federal — they apply the same way whether you live in Eugene, Springfield, or anywhere else in Oregon.

Lane County residents can get free, unbiased help from the Senior Health Insurance Benefits Assistance (SHIBA) program, Oregon's State Health Insurance Assistance Program (SHIP). SHIBA counselors don't sell plans — they help you understand deadlines, creditable coverage letters, and how to avoid penalties.

How to avoid penalties in the first place

A few practical steps that can save you a lot of money and stress:

• Mark your Initial Enrollment Period. It starts three months before your 65th birthday month. Set a calendar reminder.
• If you're still working at 65, check with your HR department in writing to confirm whether your employer coverage is "creditable" for Part B and Part D. Get it in writing.
• Don't rely on COBRA or retiree coverage to protect you from the Part B penalty — generally, it doesn't.
• Keep your creditable coverage notices. Part D plans and employers send these each fall.
• Know the Annual Enrollment Period: October 15 – December 7 for changes taking effect January 1.
• A quick note on drug costs for 2027: Part D has a $2,400 annual out-of-pocket cap, a maximum deductible of $700, and the old "donut hole" is gone — replaced by three simpler phases. There's also an optional Medicare Prescription Payment Plan that lets you spread drug costs across the year.