Medicare Advantage

Miss These Medicare Deadlines in Fairfield and Pay for Life

FAIRFIELD, Ohio — If you live in Butler County and you're new to Medicare — or helping a parent who is — the calendar matters more than almost anything else. Miss the wrong window, and the penalty can follow you for the rest of your life.

Fairfield sits inside a busy Medicare market. Butler County had 101 Medicare Advantage plans available for 2026, offered by 15 carriers, according to CMS Plan Finder data. The 2027 lineup is in each plan's ANOC and on Medicare.gov's Plan Finder. With that much choice, it's easy to spend all your time comparing options and forget the dates that actually lock those options in — or lock you out.

The one window you don't want to miss: your Initial Enrollment Period

Your Initial Enrollment Period (IEP) is seven months long. It starts three months before the month you turn 65, includes your birthday month, and ends three months after.

This is when most people first sign up for Part A and Part B. If you don't have other qualifying coverage (like an employer plan that meets Medicare's rules) and you skip this window, two penalties can start ticking:

• Part B late enrollment penalty: 10% added to your Part B premium for every full 12-month period you could have had Part B but didn't. This penalty generally lasts as long as you have Part B.
• Part D late enrollment penalty: 1% of the national base beneficiary premium for each month you went without creditable drug coverage. This one also sticks around for as long as you have Part D.

Both can follow you for life. That's the piece a lot of people learn too late.

If you're still working past 65

If you have health coverage through your job (or a spouse's job) and that employer has 20 or more employees, you usually can delay Part B without penalty. When that job or coverage ends, you get a Special Enrollment Period — generally eight months to sign up for Part B without the late fee.

A few important notes:

• COBRA and retiree coverage do not count as active employer coverage for this purpose. That's a common and expensive mix-up.
• Get something in writing from your employer or plan confirming your drug coverage is "creditable." You'll want that proof later.

If you're unsure, call your benefits office before you drop anything.

The Annual Enrollment Period: Oct. 15 – Dec. 7

This is the window most Fairfield-area retirees think of as "Medicare season." During AEP you can:

• Switch from Original Medicare to a Medicare Advantage plan, or the other way around.
• Change from one Medicare Advantage plan to another.
• Join, drop, or switch a Part D drug plan.

Whatever you pick during AEP takes effect Jan. 1. If you do nothing, you generally stay in your current plan — but your current plan may have changed. Every fall, plans send an Annual Notice of Change (ANOC). Read it. Premiums, drug lists and provider networks can all shift year to year.

One local note: Butler County had 0 stand-alone Part D plans shown in the county's 2026 landscape data, which makes drug coverage decisions run mostly through Medicare Advantage plans that include drug coverage. The 2027 lineup is in each plan's ANOC and on Medicare.gov's Plan Finder. That's another reason to actually use AEP instead of letting it slide.

The Medicare Advantage Open Enrollment Period: Jan. 1 – March 31

If you're already in a Medicare Advantage plan on Jan. 1 and it isn't working — the network is wrong, the drug list dropped something important, the plan feels like a bad fit — you get one more chance.

From Jan. 1 to March 31 you can:

• Switch to a different Medicare Advantage plan.
• Drop your Medicare Advantage plan and go back to Original Medicare (and add a Part D plan if one is available to you).

You can only make one change during this window, and it doesn't apply to people who are in Original Medicare on Jan. 1.

How the 2027 rules interact with your timing

A few 2027 program facts are worth keeping in mind as you plan around these dates:

• Part D has a new $2,100 out-of-pocket cap for 2026.
• The Part D maximum deductible is $615.
• The old coverage gap ("donut hole") is gone as of 2025 — Part D now has three phases.
• The Medicare Prescription Payment Plan lets you spread drug costs across the year in monthly amounts instead of paying big bills at the pharmacy counter.
• IRMAA surcharges — extra amounts added to Part B and Part D premiums for higher earners — begin above $109,000 in income for a single filer in 2026.

None of these change the deadlines, but they change what's at stake when you sit down during AEP.