Medicare 2026

Medicare Late Enrollment Penalties: How to Avoid Them

GERMANTOWN, Md. — Missing a Medicare deadline can cost you for the rest of your life. The late-enrollment penalties for Part B (doctor visits and outpatient care) and Part D (prescription drugs) are two of the most misunderstood rules in the program — and once they attach to your premium, they usually stay there for as long as you have that coverage.

Here's how each penalty works, who's at risk, and the simple steps most people in the Germantown area can take to avoid them.

How the Part B penalty works

If you don't sign up for Part B when you're first eligible — and you don't have other coverage that counts — Medicare adds 10% to your Part B premium for each full 12-month period you could have been enrolled but weren't.

So if you waited three full years, your premium goes up by 30%. That higher amount usually sticks with you for as long as you're enrolled in Part B, not just for a year or two.

The most common way people trip into this penalty is by assuming retiree coverage or COBRA counts as "current employer" coverage. It generally does not. Coverage that lets you delay Part B without a penalty usually has to come from a job where you (or your spouse) are still actively working.

How the Part D penalty works

The Part D penalty is smaller each month but works the same way: it lasts as long as you have Part D.

Medicare calculates it as 1% of the national base beneficiary premium for every month you went without "creditable" drug coverage after your Initial Enrollment Period ended. That amount is then rounded and added to whatever Part D premium you pay.

"Creditable" drug coverage means the plan you already have — often through an employer, union, VA, or TRICARE — is expected to pay, on average, at least as much as a standard Medicare drug plan. Your plan is required to send you a notice each year telling you whether your coverage is creditable. Keep those notices. If you enroll in Part D later, you may need to prove you had creditable coverage the whole time.

The enrollment windows that protect you

Germantown is in Montgomery County, and the Medicare enrollment rules here are the same nationwide. A few dates to know:

• Initial Enrollment Period (IEP): the 7-month window that starts three months before the month you turn 65 and ends three months after. Signing up during this window is the cleanest way to avoid both penalties.
• General Enrollment Period: January 1 – March 31, for people who missed their IEP and don't qualify for a Special Enrollment Period.
• Special Enrollment Period (SEP): available when you lose job-based coverage, move, or have another qualifying event. Using an SEP correctly can let you enroll without a penalty.
• Annual Enrollment Period: October 15 – December 7, when you can join, switch, or drop a Part D or Medicare Advantage plan.

Practical ways to avoid the penalties

Most penalty stories start with a simple misunderstanding. A few habits that help:

1. Mark your 65th birthday window on the calendar. Even if you plan to keep working, at least review your options during your IEP. 2. Get it in writing. Ask your employer or plan administrator whether your health and drug coverage is considered creditable for Medicare, and keep the annual notice. 3. Don't rely on COBRA or retiree plans as a reason to delay Part B. They generally don't protect you from the Part B penalty. 4. Enroll in a Part D plan within 63 days of losing creditable drug coverage to avoid starting the penalty clock. 5. Ask before you assume. A short call to 1‑800‑MEDICARE or your local SHIP counselor is free and can save you from a permanent premium increase.

What 2027 looks like for drug coverage

Even if you don't take many prescriptions today, Part D is worth understanding because the program keeps changing. For 2026, Part D has an out-of-pocket cap of $2,100, a maximum deductible of $615, and the old coverage gap (the "donut hole") is gone — replaced by a simpler three-phase structure that took effect in 2025.

There's also the Medicare Prescription Payment Plan, an option that lets you spread your drug costs into monthly payments instead of paying large amounts at the pharmacy counter. It doesn't lower your total cost, but it can make budgeting easier.

Higher-income enrollees should also know about IRMAA, an income-based surcharge that begins above $109,000 for a single filer in 2026 and applies to both Part B and Part D premiums. IRMAA is separate from the late-enrollment penalty, but both can appear on the same bill.