Medicare 2026

The Medicare Deadlines That Can Cost You for Life

In Rock Springs, turning 65 comes with more than birthday cards — it comes with paperwork. And two of the most important pieces of that paperwork, Medicare Part B and Part D, carry deadlines that, if missed, can raise your monthly costs for as long as you have Medicare.

The good news: the rules are clear once someone walks you through them. Here is what to know before the calendar catches you off guard.

Why these two deadlines matter more than the others

Medicare has several parts, but Part B (doctor visits and outpatient care) and Part D (prescription drugs) are the two where late sign-ups can follow you the rest of your life. Unlike a one-time fee, these penalties get added to your monthly premium every month, year after year.

That's why understanding your first window — the Initial Enrollment Period — matters so much.

Your Initial Enrollment Period: the 7-month window

When you first become eligible for Medicare at 65, you get a 7-month window to sign up. It starts three months before the month you turn 65, includes your birthday month, and ends three months after.

If you enroll during those seven months, you avoid the late penalties entirely. If you're already getting Social Security benefits, you're usually enrolled in Parts A and B automatically. If not, you have to sign up yourself through the Social Security Administration.

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 qualifying coverage, like an employer health plan based on current work — your Part B premium can go up 10% for each full 12-month period you went without it.

That higher premium generally sticks with you for as long as you have Part B. So a delay of a few years can mean paying extra every single month for the rest of your life.

There is an important exception. If you (or your spouse) are still working and covered by a group health plan from that job, you may qualify for a Special Enrollment Period to sign up later without a penalty. Retiree coverage and COBRA don't count the same way, so check before you assume you're safe.

How the Part D late penalty works

Part D has its own rule. If you go 63 days or more in a row without "creditable" prescription drug coverage after your Initial Enrollment Period ends, you can owe a late enrollment penalty when you eventually join a Part D plan.

"Creditable" means the coverage is expected to pay, on average, at least as much as standard Medicare drug coverage. Employer plans, union plans, and VA benefits often qualify — but you should get that in writing from the plan each year.

The penalty is calculated as 1% of the national base beneficiary premium for each full month you went without creditable coverage, rounded to the nearest 10 cents, and added to your Part D premium every month you have the plan.

What's new for 2027 that changes the stakes

Part D has been reshaped in ways that make signing up on time more valuable than ever:

• The out-of-pocket cap on covered prescription drugs is $2,100 in 2026 and $2,400 in 2027.
• The maximum Part D deductible is $615 in 2026 and $700 in 2027.
• The old coverage gap (the "donut hole") has been eliminated since 2025, leaving three simpler phases.
• The Medicare Prescription Payment Plan lets you spread your drug costs across the year in monthly amounts instead of paying big bills at the pharmacy counter.
• IRMAA income-related surcharges for Parts B and D begin above $109,000 in income for a single filer in 2026.

None of these features help you if you're locked out or paying a lifetime penalty. That's the point.

The enrollment periods to circle on your calendar

Beyond your Initial Enrollment Period, keep these dates in mind:

• Annual Enrollment Period: October 15 – December 7. This is when anyone with Medicare can join, switch, or drop a Part D or Medicare Advantage plan.
• Medicare Advantage Open Enrollment Period: January 1 – March 31. If you're already in a Medicare Advantage plan, you get one chance to switch plans or return to Original Medicare.
• General Enrollment Period: January 1 – March 31 for people who missed their Part B window and don't qualify for a Special Enrollment Period.

What this looks like in Rock Springs

Rock Springs is in Sweetwater County, where Medicare plan choices — Original Medicare, Medicare Advantage, and stand-alone Part D drug plans — are set at the county level. The number of plans available in Sweetwater County can change from year to year, which is another reason to review your coverage during the Annual Enrollment Period even if you enrolled on time.

Local help is available. Wyoming's SHIP program offers free one-on-one counseling from trained volunteers who don't sell insurance.