Medicare 2026

Miss Medicare's Part B or Part D Window? Penalties Can Last for Life

PATERSON, N.J. — For people turning 65 in and around Paterson, the calendar matters as much as the coverage. Medicare's late-enrollment penalties for Part B and Part D are tied to specific windows, and missing one can attach an extra charge to your monthly premium — in most cases, for as long as you have Medicare.

The good news: the deadlines are knowable, and once you understand how the windows line up, avoiding a lifelong penalty is mostly a matter of marking the right dates.

The window that starts it all: your Initial Enrollment Period

Most people first become eligible for Medicare at 65. Your Initial Enrollment Period (IEP) runs for seven months: the three months before your birthday month, your birthday month, and the three months after.

Signing up for Part A, Part B, and — if you want it — a Part D drug plan during this window is the cleanest way to avoid any late penalty later. If you're already getting Social Security benefits before 65, you're generally enrolled in Parts A and B automatically. Everyone else has to sign up on their own through the Social Security Administration.

Paterson is in Passaic County, and while enrollment periods are set by federal rules (not by where you live), the plans available to pair with Original Medicare — Part D drug plans and Medicare Advantage plans — are offered at the county level.

What happens if you miss it: the General Enrollment Period

If you don't sign up for Part B during your IEP and don't qualify for a Special Enrollment Period, you generally have to wait for the General Enrollment Period, which runs January 1 through March 31 each year. Coverage then begins the month after you enroll.

That gap is where the Part B penalty kicks in. The standard rule: your Part B premium goes up 10% for each full 12-month period you could have had Part B and didn't. That extra amount is added to your monthly premium for as long as you have Part B — not just a year or two.

The Part D clock is separate — and easy to overlook

Part D has its own deadline, and this is where a lot of people get tripped up. If you go 63 or more days in a row after your Initial Enrollment Period without "creditable" drug coverage, you can owe a Part D late-enrollment penalty when you finally sign up.

"Creditable" coverage means drug coverage that Medicare considers at least as good as a standard Part D plan — for example, many employer or union plans. Your plan is required to send you a notice each year telling you whether your coverage is creditable. Save that notice.

The Part D penalty is calculated as roughly 1% of the "national base beneficiary premium" for each month you were eligible but uncovered, rounded to the nearest 10 cents, and added to your Part D premium going forward.

The Special Enrollment Period trap

A common Paterson scenario: someone keeps working past 65 and stays on their employer's health plan. If that group coverage is from current employment (yours or your spouse's), you can usually delay Part B without penalty and pick it up later through a Special Enrollment Period.

Two things to watch:

• COBRA and retiree coverage do NOT count as current employment for this purpose. If you retire at 65 and go on COBRA, your Part B clock is already running.
• Your Special Enrollment Period to sign up for Part B without penalty generally lasts eight months after the employment or the group coverage ends, whichever comes first. For Part D, the window is much shorter — typically about 63 days after creditable drug coverage ends.

Those two clocks don't line up, which surprises people every year.

Other dates worth knowing

A few other windows sit alongside the enrollment deadlines:

• Medicare Annual Enrollment Period: October 15 – December 7. This is when anyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan for the following year.
• Medicare Advantage Open Enrollment Period: January 1 – March 31. People already in a Medicare Advantage plan get one chance to switch to another Advantage plan or drop back to Original Medicare.

These windows are about changing plans, not about avoiding late-enrollment penalties — but if you're new to Medicare, it's easy to confuse them. The penalty clocks are tied to your Initial Enrollment Period and any Special Enrollment Period you qualify for, not to the fall open enrollment.

How to avoid a lifelong penalty

A short checklist for readers in Paterson and the rest of Passaic County:

1. Know your seven-month Initial Enrollment Period and don't let it close without a decision. 2. If you're keeping employer coverage past 65, confirm in writing that it counts as current employment coverage — and get the creditable-coverage notice for the drug portion. 3. If you lose employer coverage, act fast: eight months for Part B, about 63 days for Part D. 4. Even if you take no prescriptions today, consider enrolling in a Part D plan when you're first eligible to keep the clock from running.

For personalized help — free and unbiased — New Jersey residents can contact the state's SHIP program (State Health Insurance Assistance Program), call 1-800-MEDICARE (1-800-633-4227), or visit medicare.gov. Social Security handles Part A and Part B enrollment itself, at ssa.gov or 1-800-772-1213.