Medicare 2026

How Original Medicare and Medigap Compare in Greenville

GREENVILLE, S.C. — If you're turning 65 in the Upstate, or helping a parent sort through Medicare mail, you'll quickly run into the same fork in the road: stick with Original Medicare and add a Medigap policy, or enroll in a Medicare Advantage plan. Both are legitimate ways to get your Medicare coverage. They're just built differently, and that structural difference is what shapes your costs, your choice of doctors, and how you handle care when you travel.

Here's a plain-language walk-through of how the two paths are put together, so you can think it through before Greenville's mailboxes fill up again this fall.

The two structures, side by side

Original Medicare is the federal program. 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. Original Medicare pays its share, and you're responsible for the rest — deductibles, coinsurance, and no yearly cap on what you spend out of pocket.

That last part is why many people add a Medigap policy (also called Medicare Supplement Insurance). Medigap is sold by private insurers and helps pay the gaps Original Medicare leaves behind. It doesn't replace Medicare; it works alongside it. Medigap plans don't include prescription drug coverage, so people on this path usually also enroll in a stand-alone Part D drug plan.

Medicare Advantage (Part C) is the other structure. Instead of getting your benefits directly from the federal program, you get them through a private plan approved by Medicare. The plan must cover everything Original Medicare covers, and most Advantage plans also include Part D drug coverage plus extras like dental, vision, or hearing. In exchange, the plan sets a network of doctors and hospitals, may require referrals or prior authorization, and has its own yearly out-of-pocket maximum for medical services.

What "structure" actually changes for you

The differences show up in everyday moments:

• Choosing a doctor. Original Medicare + Medigap lets you see any provider who accepts Medicare, anywhere in the U.S. Medicare Advantage generally asks you to stay in the plan's network, though rules vary by plan type.
• Paperwork at the doctor's office. With Original Medicare + Medigap, claims usually flow automatically between Medicare and the Medigap insurer. With Advantage, the plan handles the claim and applies its own rules.
• Travel. If you split time between Greenville and somewhere else, or visit grandchildren out of state, network rules matter. Original Medicare travels with you nationwide.
• Extras. Dental, vision, hearing, and fitness benefits are common in Advantage plans. They generally aren't part of Original Medicare or Medigap.
• Predictability vs. flexibility. Medigap tends to make monthly costs steadier but adds a premium. Advantage plans often have lower monthly premiums but more variable costs when you use care.

Neither approach is universally better. It depends on your health, your doctors, your budget, and how you like to handle surprises.

Drug coverage in 2027

Whichever path you choose, understand how Part D is changing. The out-of-pocket cap for covered Part D 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 "donut hole" coverage gap was eliminated in 2025, so the benefit now has three phases instead of four. Medicare also offers the Medicare Prescription Payment Plan, an optional program that lets you spread your drug costs across the year in monthly payments instead of paying at the pharmacy counter.

Higher-income beneficiaries pay an IRMAA surcharge on Part B and Part D. In 2026, IRMAA begins above $109,000 in income for a single filer.

Plan availability in Greenville County

Greenville is in Greenville County, where Medicare plan availability — the number of Medicare Advantage plans and stand-alone Part D plans offered — is set at the county level by CMS. That means two neighbors in different counties can see different plan menus. When you use the Plan Finder at medicare.gov, it asks for your ZIP code so it can show you exactly what's offered where you live. We're not naming or ranking plans here; the point is simply that your options are local, and it's worth looking them up rather than relying on what a friend across the state line was offered.

Timing: the dates that matter

• Initial Enrollment Period. A seven-month window around your 65th birthday.
• Medigap Open Enrollment. A one-time six-month window that starts when you're 65 and enrolled in Part B. During this window, insurers can't deny you a Medigap policy or charge more based on health. Outside it, medical underwriting may apply.
• Annual Enrollment Period (AEP). Oct. 15 – Dec. 7 each year. This is when you can join, switch, or drop a Medicare Advantage or Part D plan for the following year.
• Medicare Advantage Open Enrollment Period. Jan. 1 – March 31. If you're already in an Advantage plan, you can switch to a different Advantage plan or return to Original Medicare once during this window.

How to think it through

A few questions to ask yourself before choosing:

1. Are my current doctors in a specific plan's network, or do I want the freedom to see any Medicare provider? 2. Do I take regular prescriptions, and are they covered under the drug plan I'm considering? 3. Do I travel or spend part of the year outside South Carolina? 4. Would I rather pay a steadier monthly premium or a lower premium with more variable costs when I need care? 5. If I choose Medicare Advantage now, do I understand that switching to Medigap later may involve medical underwriting?

There's no wrong question. And you don't have to sort this out alone.

Where to get unbiased help

For personalized answers, use official sources:

• Medicare.gov — plan comparisons, enrollment, and the Plan Finder tool.
• 1-800-MEDICARE (1-800-633-4227) — 24/7 help from Medicare directly.
• South Carolina SHIP (State Health Insurance Assistance Program) — free, one-on-one counseling from trained volunteers who don't sell insurance. In South Carolina, SHIP is called SHIINE (Seniors' Health Insurance Information Program), reachable through the S.C. Department on Aging.