Medicare 2026

Medicare Enrollment Windows That Matter in Columbia, MD

Columbia, Maryland — Missing a Medicare enrollment window can cost you every month for the rest of your life. That's the part many people don't realize until the bill shows up. The good news: Part B and Part D late-enrollment penalties are avoidable if you know the rules and act on time.

How the Part B 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 coverage that counts — Medicare can add 10% to your Part B premium for each full 12-month period you delayed.

Here's the part that stings: in most cases, that penalty sticks with you for as long as you have Part B. It's not a one-time fee. It's baked into your monthly premium.

Your Initial Enrollment Period is a seven-month window around your 65th birthday — the three months before, your birthday month, and the three months after. If you miss it and don't qualify for a Special Enrollment Period, you may have to wait for the General Enrollment Period (Jan. 1 – March 31) to sign up.

How the Part D penalty works

Part D is prescription drug coverage. The penalty here is calculated a little differently: about 1% of the "national base beneficiary premium" for every month you went without Part D or other creditable drug coverage after your Initial Enrollment Period ended.

That amount is added to your Part D premium each month — and, like the Part B penalty, it generally lasts as long as you have Part D coverage. The national base premium can change year to year, so the exact dollar figure moves too.

What "creditable coverage" means

This is the phrase that saves people from penalties. "Creditable coverage" means other insurance that Medicare considers at least as good as its own.

• For Part B, that's usually active employer group coverage based on your (or your spouse's) current job.
• For Part D, that's drug coverage — from an employer, union, VA benefits, or another qualifying source — that pays, on average, at least as much as standard Medicare drug coverage would.

Your plan is required to send you a notice each year telling you whether your drug coverage is creditable. Keep those notices. They're your proof if a penalty is ever assessed.

Special Enrollment Periods can be your safety net

If you delayed Part B because you had job-based insurance, you typically get an eight-month Special Enrollment Period to sign up after that coverage or the job ends — whichever comes first. For Part D, you generally have 63 days after losing creditable drug coverage to enroll without a penalty.

COBRA and retiree coverage do not count as active employer coverage for Part B purposes. This is one of the most common — and most expensive — misunderstandings we see.

What this looks like locally

Columbia is in Howard County, where a range of stand-alone Part D plans and Medicare Advantage plans that include drug coverage are offered each year. The specific plan lineup changes annually, so it's worth checking the Plan Finder at medicare.gov during the Annual Enrollment Period (Oct. 15 – Dec. 7).

A few program facts worth knowing while you're comparing:

• Part D out-of-pocket costs are capped at $2,100 in 2026 and $2,400 in 2027.
• The maximum Part D deductible is $615 in 2026 and $700 in 2027.
• The old "donut hole" coverage gap is gone; there are now three payment phases.
• The Medicare Prescription Payment Plan lets you spread your drug costs into monthly installments if you want.
• IRMAA income-based surcharges begin above $109,000 for a single filer.

If you already have a penalty

You can ask for a "reconsideration" if you believe the penalty was applied in error — for example, if you actually had creditable coverage during the gap. Your plan or Medicare will send you a form explaining how to appeal and what documents to include.

For personalized help, Maryland residents can contact the State Health Insurance Assistance Program (SHIP), known locally as SHIP/SMP through the Maryland Department of Aging. Counselors there don't sell anything.