How does each option work?
Original Medicare with Medigap: Medicare pays first for hospital and medical care, and your Medigap policy pays some or all of what's left, such as deductibles and the 20% Part B coinsurance. You add a standalone Part D plan for drugs. See Medigap in North Carolina.
Medicare Advantage: a private plan approved by Medicare replaces Original Medicare for your Part A and Part B care. Most plans include Part D, use a provider network, and charge copays or coinsurance as you use care, up to a yearly limit. See Medicare Advantage in North Carolina.
You need Part A and Part B either way, and you keep paying your Part B premium either way. In North Carolina, 1,346,766 of 2,328,318 people with Medicare were in Medicare Advantage or another Medicare health plan in July 2026, and 981,552 in Original Medicare, per CMS.
How do the costs compare?
| Cost | Original Medicare + Medigap + Part D | Medicare Advantage |
|---|---|---|
| Monthly premium | Part B, plus the Medigap premium, plus the Part D premium. | Part B, plus the plan's premium if it has one. |
| Bills when you get care | Depends on the plan letter. Plan G leaves you the Part B deductible; Plans K, L and N leave more cost sharing. | Copays or coinsurance for most services, set by the plan. |
| Yearly limit on medical costs | None in Original Medicare alone. Plan K's limit is $8,360 and Plan L's $4,180 in 2027; with Plan G, very little is left to pay. | Required: up to $9,850 in network in 2027 (a PPO's combined limit can be up to $14,800). |
| Drug costs | Through a Part D plan, capped at $2,400 in 2027. | Usually included, with the same $2,400 cap. |
| How premiums change | Medigap premiums usually rise over time. North Carolina lets companies choose how to price, but a policy priced by attained age must say in writing that its premium goes up as you age, with a 10-year illustration (G.S. 58-54-25(f)). | Premiums and benefits can change every January 1; your Annual Notice of Change shows what's new. |
| Doctors who charge above Medicare's rate | Federal limits apply: a provider who doesn't take assignment can charge up to 15% more. Plans F and G cover those excess charges. | You pay the plan's cost sharing for in-network care. |
Medicare Advantage plans may offer extra benefits such as dental, vision, hearing or fitness. Extra benefits vary by plan and county, may have limits and costs, and not every plan offers them. Check a plan's Summary of Benefits or Evidence of Coverage.
Networks, mountains, the coast and time away
| Question | Original Medicare + Medigap | Medicare Advantage |
|---|---|---|
| Which doctors and hospitals? | Any provider in the U.S. who accepts Medicare. | The plan's network. HMOs generally cover out-of-network care only for emergencies and urgent care; PPOs cover it at a higher cost. |
| Referrals and prior approval | No referrals. Medicare's rules decide what's covered. | Many plans need referrals or prior authorization for some services. |
| Choice where you live | The same everywhere in North Carolina. | Depends on the county. For 2027, Guilford County has 57 plans open to everyone and Carteret County 11; check the network near you. |
| Mountain and border counties | Works with any hospital that accepts Medicare, including across the line in Tennessee, Virginia, South Carolina or Georgia. | Check that the plan's network includes the hospital you'd actually use, especially if it's in another state. |
| Time in another state | Works the same in every state. | Emergencies and urgent care are covered; routine care away usually isn't in an HMO. More than 6 months in a row away ends your enrollment unless the plan has a visitor program. |
| Travel outside the U.S. | Plans C, D, F, G, M and N pay 80% of emergency care for the first 60 days of a trip, after a $250 deductible, up to a $50,000 lifetime limit. | Generally not covered; check the plan's Evidence of Coverage. |
| After a hurricane or flood | Any provider who accepts Medicare, wherever you evacuate. | When a disaster is declared and access is disrupted, plans must cover non-network facilities at in-network cost sharing (42 CFR 422.100(m)). |
See rural and mountain Medicare and hurricanes, floods and Medicare in North Carolina.
Switching later: why North Carolina's rules matter
North Carolina's Medigap law (G.S. Chapter 58, Article 54, and rule 11 NCAC 12 .0843) has no birthday rule, anniversary rule or yearly switching right. That makes the direction you move important.
| Change | Health questions? | Rule |
|---|---|---|
| Buy Medigap in your first 6 months when you're both 65 and in Part B | No | Federal Medigap open enrollment |
| Buy Medigap under 65 with Medicare because of a disability, within 6 months of Part B | No, for Plan A, and Plan D or G if the company sells them at 65+ | G.S. 58-54-45 |
| Switch Medigap policies later | Usually yes | No North Carolina birthday rule |
| Leave Medicare Advantage for Medigap | Usually yes | No health questions only with a guaranteed-issue right |
| Leave Medicare Advantage within 12 months of joining at 65 (trial right) | No | Federal guaranteed issue for any Medigap policy sold in North Carolina |
| Your Medicare Advantage plan ends or leaves your county | No, for Plans A, B, D, G, K or L (C or F if eligible before 2020); under 65, Plans A, D or G | Federal guaranteed issue and G.S. 58-54-45(b); apply up to 63 days after coverage ends |
| Switch Medicare Advantage plans | No | October 15 to December 7, and January 1 to March 31 |
In short: in North Carolina it's easier to start with Medigap and move to Medicare Advantage later than the other way around. When you do buy a Medigap policy, you have 30 days to return it for a full refund (G.S. 58-54-30), and a new policy can't refuse to pay for a pre-existing condition for more than 6 months (G.S. 58-54-10(d)).
Other North Carolina factors to weigh
- State Health Plan retirees: your choices are the Plan's group Medicare Advantage Base Plan or Enhanced Plan, or the 70/30 Plan, which pays after Original Medicare. Joining an outside Medicare Advantage or Part D plan moves you off the group plan. See State Health Plan retirees and Medicare.
- NC Medicaid and MQB: with full NC Medicaid you usually don't need Medigap, and you may qualify for a D-SNP. See D-SNPs in North Carolina and Medicare Savings Programs in North Carolina.
- Military and veterans: TRICARE For Life pays after Medicare and requires Part A and Part B. See military, veterans and TRICARE in North Carolina.
- Moving here: a Medigap policy from another state keeps working in North Carolina; a Medicare Advantage plan usually doesn't. See moving to North Carolina: Medigap vs. Medicare Advantage.
- Plans ending in 2027: if your Medicare Advantage plan is ending, this is a rare chance to buy Medigap without health questions. See North Carolina plans ending in 2027.
How to decide
- List your doctors, hospitals and drugs. Include specialists at the state's academic medical centers and any provider across a state line.
- Check what's sold in your county. Look up your county on our counties page and check each plan's network for your providers.
- Compare a typical year and a bad year. Add premiums and expected copays, then compare with the plan's out-of-pocket limit or your Medigap plan's coverage.
- Think about time away. If you spend months outside North Carolina, weigh how each option handles care there.
- Mind your timing. Your Medigap open enrollment period at 65 is the one time any company must sell you any policy it offers, at a price not based on your health.
To compare Medigap policies and Medicare Advantage plans from the companies they work with, you can request a call from a licensed insurance agent, or see plans for your ZIP code. Complaints about an agent or company go to the NC Department of Insurance complaint page.
Sources
- N.C. General Statutes Chapter 58, Article 54 — Medicare Supplement Insurance Minimum Standards (58-54-10, -25, -30)
- N.C.G.S. 58-54-45 — Medicare supplement coverage for people under 65 by reason of disability
- NC Office of Administrative Hearings — 11 NCAC 12 (rule .0843, Medicare supplement insurance)
- Medicare.gov — Compare Original Medicare and Medicare Advantage
- Medicare.gov — Choosing a Medigap Policy (guaranteed issue, trial right, foreign travel)
- eCFR — 42 CFR 422.74 (6-month absence from service area)
- eCFR — 42 CFR 422.100(m), access to care during disasters
- CMS — Medicare Advantage and Part D Landscape files, contract year 2027 (plan counts)
- CMS — CY 2027 Rate Announcement (Part D out-of-pocket threshold)
- CMS — Out-of-pocket limits for Medigap Plans K and L, 2027
- State Health Plan — 2027 Medicare Primary Plan Comparison
Frequently asked questions
Is Medigap or Medicare Advantage better in North Carolina?
Neither is better for everyone. Medigap with Original Medicare suits people who want any provider in the U.S. who accepts Medicare, travel or live part of the year elsewhere, or want predictable bills. Medicare Advantage suits people comfortable with a local network who want drug coverage and possible extra benefits in one plan.
Can I have Medicare Advantage and Medigap at the same time?
No. A Medigap policy doesn't pay anything while you're in Medicare Advantage, and it's illegal for a company to sell you one then unless you're switching back to Original Medicare. If you already have Medigap and join Medicare Advantage for the first time, you may want to keep it during your 12-month trial period.
If I choose Medicare Advantage, can I switch to Medigap later in North Carolina?
You can return to Original Medicare during Open Enrollment or the January to March window, but outside a guaranteed-issue situation a Medigap company can ask health questions and turn you down. North Carolina law has no birthday rule or yearly switching right.
Can I get Medigap under 65 in North Carolina?
Yes, if you have Medicare because of a disability. N.C.G.S. 58-54-45 requires companies to offer Plan A, and Plan D or G if they sell those to people 65 and older, if you apply within 6 months of enrolling in Part B. You get a new Medigap open enrollment period at 65.
Do I need a separate drug plan with Medigap?
Yes. Medigap policies don't cover prescriptions, so most people with Medigap also join a standalone Part D plan. CMS lists 11 standalone Part D plans in North Carolina for 2027. Most Medicare Advantage plans include drug coverage.
Medicare in your North Carolina county
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