Medicare 2026

Why Medigap and Medicare Advantage Diverge for Spring Hill

SPRING HILL, Tenn. — If you're getting close to 65 in Spring Hill, you'll likely run into one of the biggest decisions Medicare asks you to make: stick with Original Medicare and add a Medigap policy, or go with a Medicare Advantage plan instead. The two paths are built very differently, and understanding how they're structured — before you enroll — can save you a lot of confusion (and sometimes regret) down the road.

The two paths, side by side

Original Medicare is the federal program — Part A (hospital) and Part B (medical). You can go to any doctor or hospital in the country that accepts Medicare, and there are no networks. But Original Medicare doesn't cover everything. It has deductibles, 20% coinsurance on most Part B services, and no yearly cap on what you might pay out of pocket.

That's where Medigap (also called Medicare Supplement Insurance) comes in. A Medigap policy is sold by a private insurer and helps pay some of the costs Original Medicare leaves you with — like that 20% coinsurance or hospital deductibles. Medigap works alongside Original Medicare. It does not include drug coverage, so most people on this path also add a stand-alone Part D plan.

Medicare Advantage (Part C) is a different structure. Instead of getting your Part A and Part B benefits directly from the federal government, you get them through a private plan that Medicare pays to manage your care. Advantage plans usually have networks (HMO or PPO), often include Part D drug coverage, and may include extras like dental or vision. They also have a yearly out-of-pocket maximum built in.

Why "structural" matters more than the brochure

People often compare plans by looking at monthly premiums or extra benefits. Those matter, but the structural difference matters more, because it shapes how you actually use your coverage.

• On the Original Medicare + Medigap path, your flexibility is wide (any Medicare provider), your monthly cost is usually higher, and your out-of-pocket surprises are smaller.
• On the Medicare Advantage path, your monthly cost is often lower, extras may be bundled in, but you generally use in-network providers and follow the plan's rules for referrals or prior authorization.

Neither is "better." They're built for different priorities.

What's the same on both paths

No matter which path you choose, some federal rules apply across the board:

• Part D prescription drug coverage has a $2,100 out-of-pocket cap in 2026.
• The Part D deductible can be up to $615.
• The old "donut hole" coverage gap is gone as of 2025 — Part D now has three phases.
• The Medicare Prescription Payment Plan lets you spread your drug costs out across the year in monthly installments, at no extra charge.
• IRMAA — higher Part B and Part D premiums for higher earners — starts above $109,000 in income for a single filer in 2026.

These rules come from Medicare itself, so they follow you regardless of which path you pick.

What's available around Spring Hill

Spring Hill sits in Maury County (with a slice in Williamson County), and Medicare Advantage and Part D plan availability is set at the county level. That means the menu of plans you'll see when you shop on medicare.gov depends on the county where you live, not the city. Two neighbors on opposite sides of the county line can see different plan lists.

We can't recommend any specific plan here, and we won't. But a licensed agent or your local SHIP counselor can walk you through what's offered in your county.

Enrollment windows to know

• Initial Enrollment Period: The seven months around your 65th birthday.
• Annual Enrollment Period (AEP): Oct. 15 – Dec. 7 every year. This is when anyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan.
• Medicare Advantage Open Enrollment: Jan. 1 – March 31. If you're already in an Advantage plan, you get one chance during this window to switch to a different Advantage plan or return to Original Medicare.

One important note on Medigap: it has its own rules. You get strong federal protections to buy a Medigap policy without medical underwriting during a six-month window that starts when you're 65 and enrolled in Part B. Outside that window, insurers in most states can ask health questions and may charge more or decline coverage. This is one of the most common — and costly — Medicare mistakes to be aware of before choosing a path.

Common mistakes to avoid

• Assuming you can freely switch from Medicare Advantage back to Original Medicare + Medigap later. You can switch plans, but getting a Medigap policy after your initial window may require medical underwriting.
• Choosing based on extras alone. Dental, vision, and gym benefits are nice, but the network and prior-authorization rules affect your day-to-day care more.
• Forgetting about drug coverage. If you go Original Medicare + Medigap and don't add a Part D plan when first eligible, you may face a lifelong late-enrollment penalty.
• Waiting until the last week of AEP. Give yourself time to compare on medicare.gov.