Medicare 2026

Two structures, one Medicare: how the paths differ in Westfield

WESTFIELD, Mass. — Turning 65 in Westfield brings a fork in the road that trips up a lot of new Medicare enrollees. It isn't really a choice between dozens of plans. At its core, it's a choice between two very different ways of getting your Medicare coverage — and once you understand the structure, the rest of the decision gets easier.

One path is Original Medicare (Parts A and B), often paired with a standalone Medigap policy and a separate Part D drug plan. The other is Medicare Advantage (Part C), a private plan that bundles your hospital, medical, and usually drug coverage together. Both are legitimate, both follow Medicare rules, and both are used by millions of people. They just work differently — and that difference matters most on the day you actually need care.

Path one: Original Medicare with Medigap

Original Medicare is the federal program itself. Part A covers hospital stays, and Part B covers doctor visits and outpatient care. You can see any provider in the country who accepts Medicare, and there are no network restrictions or referral requirements.

The catch is that Original Medicare alone has deductibles, coinsurance, and no annual out-of-pocket limit. That's where Medigap (also called Medicare Supplement Insurance) comes in. Sold by private insurers under standardized letter plans (A, B, G, N, and others), Medigap policies help pay the costs Medicare leaves behind.

Because Original Medicare doesn't include prescription drug coverage, most people on this path also buy a standalone Part D plan.

Path two: Medicare Advantage

Medicare Advantage plans are offered by private insurers approved by Medicare. When you enroll, the plan takes over the administration of your Part A and Part B benefits, and most Advantage plans include Part D drug coverage in the same package. Many also offer extras Original Medicare doesn't cover, like routine dental, vision, or hearing benefits.

Advantage plans typically use provider networks (HMOs or PPOs), may require referrals or prior authorization, and set their own copays and annual out-of-pocket maximums for medical care.

Westfield is in Hampden County, where multiple carriers offer Medicare Advantage and Part D plans. You can compare what's available in your ZIP code using the Plan Finder at medicare.gov.

The structural difference in one sentence

Medigap works with Original Medicare to fill in its gaps. Medicare Advantage replaces how you get Original Medicare, using a private plan instead. That's the whole distinction — and it's why you generally can't have both a Medigap policy and a Medicare Advantage plan at the same time.

What stays the same either way

Some Medicare rules apply no matter which path you choose:

• Part D drug costs: the out-of-pocket cap is $2,100 in 2026 and $2,400 in 2027; the maximum deductible is $615 in 2026 and $700 in 2027. The old "donut hole" coverage gap has been eliminated as of 2025, leaving three simpler phases.
• The Medicare Prescription Payment Plan: an optional way to spread your drug costs into monthly installments.
• IRMAA: higher-income enrollees pay extra for Part B and Part D. In 2026, IRMAA surcharges begin above $109,000 in income for a single filer.
• Enrollment windows: the Annual Enrollment Period is Oct. 15 – Dec. 7, and Medicare Advantage Open Enrollment is Jan. 1 – March 31.

The mistake to avoid

The most common regret we hear from readers is choosing a path without thinking about how easy it is to switch later. When you first become eligible for Medicare, federal rules give you a Medigap open enrollment window during which insurers must sell you a policy regardless of your health.

Outside that window, Massachusetts has some of the more consumer-friendly Medigap rules in the country, but protections vary and it's worth checking the specifics before assuming you can move freely between paths. Advantage-to-Advantage or Advantage-to-Original-Medicare switches are generally allowed during the enrollment periods above, but adding a Medigap policy after the fact isn't always guaranteed.

Take the time up front to think about how you use care, whether your doctors are in a given plan's network, and what happens if your health changes.