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Medicare Supplement

Medigap in Charlotte: what each Medicare plan letter covers

CHARLOTTE, N.C. — If you have Original Medicare and you've ever tried to compare Medicare Supplement plans, you've probably run into a wall of letters: Plan A, Plan G, Plan N, and more. It looks confusing, but there's a reason those letters exist — and once you understand them, shopping gets a lot easier.

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Reading a guide at home in Charlotte — illustrating this Medicare guide
Photo: Clay Banks Photo by Clay Banks on Unsplash

Key takeaways

  • Medigap is private insurance that works with Original Medicare to help cover leftover costs like coinsurance and copayments.
  • Medigap plans are standardized, so a given letter plan, like Plan G, offers the same core benefits no matter which company sells it, meaning price and service are what differ between companies.
  • Plans C and F are no longer sold to people who became eligible for Medicare on or after January 1, 2020, though those eligible before that date may still be able to buy them.
  • You get a one-time, six-month Medigap Open Enrollment Period starting the month you turn 65 or older and enroll in Part B, during which insurers must sell you a policy at their best rate without turning you down or charging more for your health history.

Making sense of Medigap in Charlotte

Medicare Supplement Insurance, better known as Medigap, is private insurance that works alongside Original Medicare (Part A and Part B). It helps pay some of the out-of-pocket costs that Original Medicare doesn't cover, like coinsurance and copayments. This guide walks through what Medigap does, how the standardized letters work, and where Charlotte readers can get personal help.

What Medigap actually does

Original Medicare pays most, but not all, of your hospital and medical bills. After Medicare pays its share, you're often left with coinsurance, copays, and deductibles. Medigap steps in to help pay some of those leftover costs.

A few basics worth knowing:

Why the letters exist

Here's the part that trips people up. Medigap plans are standardized by the federal government. That means Plan G from one company must offer the same core benefits as Plan G from another company. The letters (A, B, C, D, F, G, K, L, M, N) each represent a different set of standardized benefits.

What can differ between companies selling the same letter plan:

So when you compare, say, two Plan G policies, you're really comparing price and service — not benefits. That's the whole point of standardization: it makes apples-to-apples shopping possible.

Note: Plans C and F are no longer sold to people who became eligible for Medicare on or after January 1, 2020. If you were eligible before that date, you may still be able to buy them.

How to read the letter chart

When you look at a Medigap comparison chart on Medicare.gov, you'll see checkmarks under each letter showing what that plan covers. The benefits generally fall into these buckets:

Plans with more checkmarks usually have higher premiums. Plans with fewer checkmarks tend to cost less each month but leave more for you to pay when you use care. There is no single "right" letter — it depends on your budget, your health, and how much predictability you want in your bills.

Timing matters: your Medigap Open Enrollment Period

This is the piece many Charlotte readers miss. You have a one-time, six-month Medigap Open Enrollment Period that starts the month you're 65 or older AND enrolled in Part B. During this window, insurers must sell you any Medigap policy they offer at their best available rate, and they cannot turn you down or charge more because of your health history.

Outside that window, in most states, insurance companies can use medical underwriting. That means they can ask about your health and potentially deny coverage or charge higher premiums. North Carolina generally follows federal rules here, so timing your first Medigap purchase carefully is important.

What's available around Charlotte

Charlotte is in Mecklenburg County, where multiple insurance companies sell standardized Medigap plans. Because the letter benefits are the same across companies, the smart move is to pick the letter that fits your needs first, then compare premiums and company reputation for that specific letter.

You can see the full list of Medigap policies available in your ZIP code using the "Find a Medigap policy" tool at Medicare.gov.

By the numbers

Medicare Part B premium, 2006–2026

The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.

$0$50$100$150$200200820122016202020242026

Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.

By the numbers

How people get Medicare in Mecklenburg County

56% are on Medicare Advantage
(MA penetration in Mecklenburg County)
56%
44%
Medicare Advantage Medicare Supplement (Medigap) Original Medicare only
U.S. average

MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.

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Medicare Advantage companies in Mecklenburg County

By local enrollment size · informational, not a ranking
CompanyLocal enrollmentPlans offeredLocal agentsAction
UnitedHealthcareNational—Yes
HumanaNational—Yes
Aetna (CVS Health)National—Yes
Curacor Solutions CorpRegional—Yes
Blue Cross Blue Shield (HCSC)Regional—Yes
Devoted Health IncRegional—Yes
Enrollment data: CMS Medicare Advantage enrollment by company (county level). Figures shown are illustrative sample data pending the current CMS file. Listed by enrollment size, largest first — this is not a ranking, recommendation, or endorsement of any company or plan.

Provided by licensed insurance partners; MyMedicarePlans.org may be compensated. Not a ranking or endorsement of any plan.

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The parts of Medicare

Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health care. Most people pay no premium for Part A.

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When can you enroll? An interactive year

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October 15 – December 7 — anyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan. Changes take effect January 1.

Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.

Good to know

Frequently asked questions

Is Medigap the same as Medicare Advantage?
No. Medicare Advantage (Part C) replaces Original Medicare and is offered by private plans with their own networks and rules. Medigap works alongside Original Medicare to help pay its out-of-pocket costs. You cannot have both at the same time.
Do I need a separate drug plan if I have Medigap?
Usually, yes. Medigap policies sold today don't include prescription drug coverage, so most people pair Medigap with a stand-alone Part D plan. For 2026, Part D has a $2,100 annual out-of-pocket cap and a maximum deductible of $615.
Can I switch from one Medigap plan to another later?
You can apply anytime, but outside your one-time Open Enrollment window, insurers in most cases can use medical underwriting. That may affect whether you're accepted or what you'll pay.
Sources & further reading
  • CMS — Medicare basics (medicare.gov)

For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.

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