Medicare Advantage

2027 Medicare in Nashua: Dates, Deadlines, IRMAA

Nashua, N.H. — If you're on Medicare in Nashua, the choices you make this fall shape your 2027 coverage, and the calendar matters as much as the plan itself. The federal government has set the enrollment windows and confirmed a Part D out-of-pocket cap of $2,400 for 2027. Missing a date can mean waiting months to fix a plan choice — or paying a penalty that follows you for life.

Here's a plain-language guide to the deadlines Nashua residents should have on the fridge, and what happens if one slips by.

The two windows that matter most

Two enrollment periods drive most Medicare decisions each year, and they do very different jobs.

The Annual Enrollment Period (AEP) runs Oct. 15 through Dec. 7. This is the window when anyone with Medicare can join, switch, or drop a Medicare Advantage plan or a stand-alone Part D drug plan. Whatever you choose during AEP takes effect Jan. 1.

The Medicare Advantage Open Enrollment Period (MA OEP) runs Jan. 1 through March 31. It's narrower: it's only for people already enrolled in a Medicare Advantage plan. During this window, you can switch to a different Advantage plan once, or drop Advantage and go back to Original Medicare (and add a Part D plan). You cannot use MA OEP to join Medicare Advantage for the first time if you're currently on Original Medicare.

Put simply: AEP is the "big" window for everyone. MA OEP is a second chance, but only for Advantage members.

What happens if you miss a deadline

Missing AEP is usually not the end of the world, but it does mean you're locked into your current coverage for the calendar year unless you qualify for a Special Enrollment Period (SEP). SEPs are triggered by specific life events — moving out of your plan's service area, losing employer coverage, qualifying for Medicaid or Extra Help, or moving into or out of a nursing facility, among others.

Missing your Initial Enrollment Period when you first become eligible for Medicare is more serious. If you don't sign up for Part B when you should have, and you don't have qualifying coverage from an employer, you can face a lifetime Part B late-enrollment penalty — 10% added to your premium for each full 12-month period you were eligible but didn't enroll.

The Part D late-enrollment penalty works similarly: about 1% of the national base beneficiary premium for every month you went without creditable drug coverage after you were first eligible. That penalty is added to your Part D premium for as long as you have Part D.

How the dates interact with IRMAA

Higher-income Medicare beneficiaries pay an Income-Related Monthly Adjustment Amount (IRMAA) on top of their Part B and Part D premiums. For 2026, IRMAA begins above $109,000 in income for a single filer (roughly double that for joint filers).

Here's the timing wrinkle: your 2027 IRMAA will be based on your 2025 tax return. If your income dropped because of a "life-changing event" — retirement, the death of a spouse, divorce, loss of a pension — you can file Form SSA-44 with Social Security to ask for a reduction. Don't wait until you get the surprise bill; the appeal is easier when the paperwork is fresh.

A quick note on Nashua's plan options

Nashua is in Hillsborough County, where for 2026 there are 19 Medicare Advantage plans available and 4 carriers offering Medicare Advantage with prescription drug coverage. New Hampshire has 9 stand-alone Part D plans for 2026, sold statewide, so anyone in the county with Original Medicare can join one of them alongside Medicare Advantage drug coverage options. The 2027 lineup is in each plan's Annual Notice of Change and on Medicare.gov's Plan Finder — AEP is your yearly chance to compare what's on the shelf.

Scenarios Nashua readers ask about

"I just turned 65 in October. Which window is mine?" Your Initial Enrollment Period — the seven-month window around your 65th birthday — takes priority. Use it. AEP is for people already in Medicare.

"I'm in a Medicare Advantage plan and I don't like it. It's February." You're inside the MA OEP. You have until March 31 to switch to another Advantage plan or return to Original Medicare and pick up a Part D plan.

"I forgot to enroll in Part D three years ago and I take no drugs." You may still owe a penalty when you eventually enroll, unless you had creditable coverage (from an employer, VA, or similar). The penalty is calculated from the month you were first eligible.

Where to get personal help

Medicare decisions are personal, and Nashua residents have free, unbiased help available.

• medicare.gov — the official Plan Finder, with 2027 plans available for comparison during AEP.
• 1-800-MEDICARE (1-800-633-4227) — available 24/7.
• New Hampshire's SHIP program, called ServiceLink, offers free one-on-one Medicare counseling. You can reach the statewide line at 1-866-634-9412 or visit the Greater Nashua ServiceLink Resource Center.