Medigap vs Medicare Advantage is really a choice between two ways to handle Medicare’s gaps: Medigap keeps Original Medicare and adds a supplement that pays many of its out-of-pocket costs, while Medicare Advantage replaces Original Medicare with a private plan that has its own network, copays and yearly spending limit. You cannot use both at once, and the decision affects your doctor choice, monthly cost and future flexibility.
Anyone approaching 65, or anyone reviewing coverage during the fall enrollment period, should understand how these paths differ before choosing. The sections below walk through costs, networks, drug coverage and the timing rules that can make a late change difficult.
Key Takeaways
- Medigap pairs with Original Medicare, usually has higher monthly premiums, and keeps your costs predictable. It lets you see any provider that accepts Medicare.
- Medicare Advantage often has a low or $0 plan premium, but you use a network and may pay copays. Its yearly in-network cap is up to $9,250 in 2026.
- Medigap does not include prescription drug coverage. You need a separate Part D plan, while most Advantage plans include drugs.
- You have a one-time six-month window after you are 65 and enrolled in Part B to buy a Medigap policy without health questions in most states.
- You still pay the Part B premium either way, which is $202.90 per month for most people in 2026.
The Two Paths in Plain English
Original Medicare covers hospital care under Part A and outpatient care under Part B, but it leaves you with deductibles, coinsurance and no yearly limit on what you could owe. In 2026, the Part A deductible is $1,736 per benefit period and the Part B deductible is $283. After the Part B deductible, you generally pay 20% of approved amounts for most outpatient services, with no cap.
That open-ended exposure is the problem both options try to solve, in different ways.
Medigap (Medicare Supplement Insurance)
A Medigap policy is sold by private insurers and standardized by letter, for example Plan G, Plan N or Plan A. Within a lettered plan, benefits are the same across insurers, only the price and company differ. It works alongside Original Medicare: Medicare pays its share first, then the Medigap plan pays some or all of the remaining cost sharing.
Medicare Advantage (Part C)
Medicare Advantage plans are offered by private insurers approved by Medicare. They must cover everything Original Medicare covers and many add extras like dental, vision or hearing allowances. Most are HMOs or PPOs, so network rules apply. Each plan sets its own copays and must include an annual limit on in-network spending, which is $9,250 at most for 2026 and often lower. For a deeper look at Original Medicare itself, read Medicare Advantage vs Original Medicare.
Medigap vs Medicare Advantage: Side-by-Side
| Feature | Medigap + Original Medicare | Medicare Advantage |
|---|---|---|
| Monthly cost | Part B premium plus Medigap premium plus Part D | Part B premium plus plan premium, often low |
| Doctor choice | Any provider accepting Medicare nationwide | Plan network, with rules that vary by plan type |
| Referrals | Not needed | Often needed in HMO plans |
| Yearly spending limit | Depends on the Medigap plan; most standard plans cover nearly all cost sharing | Required cap on in-network costs |
| Prescription drugs | Separate Part D plan | Usually included |
| Extra benefits | Generally none beyond foreign travel emergency coverage on some plans | Often dental, vision, hearing, fitness |
| Prior authorization | Rarely | More common |
| Switching later | May require health questions | Can switch during enrollment periods |
What Each Option Costs
Costs have three layers: premiums, what you pay at the point of care, and the worst-case year. Prices differ widely by state, age, gender and tobacco use, so treat the following as illustrative.
Medigap pricing
Monthly premiums for a popular plan such as Plan G commonly run from around $100 to well over $250 depending on location and age. Plan G covers every Medicare cost-sharing amount except the Part B deductible, so once you pay that deductible each year, your remaining covered costs are mostly predictable. Plan N has a lower premium and covers most of the same costs, but you may pay a copay of up to $20 for some office visits and up to $50 for an emergency room visit that does not lead to admission, plus any Part B excess charges.
Insurers price Medigap in one of three ways. Community-rated premiums do not depend on age. Issue-age premiums are based on the age you buy, and attained-age premiums rise as you get older. The method can matter more than the first-year price, so ask the insurer which one applies and request the rate history.
Medicare Advantage pricing
Many Advantage plans charge no premium beyond Part B, but you pay copays when you use care, such as a set fee for each specialist visit or hospital day. Costs can add up in a bad year, up to the plan’s cap. The result is lower fixed costs and more variable ones.
An illustrative comparison
These numbers are invented for explanation. Imagine two neighbors, each healthy most of the year but facing a hospital stay.
| Illustrative scenario | Medigap Plan G | Advantage plan |
|---|---|---|
| Monthly plan premium | $160 | $0 |
| Annual plan premium | $1,920 | $0 |
| Part B deductible (before Plan G pays) | $283 | Depends on plan |
| Hospital stay and follow-up care | Little to nothing beyond the deductible | Copays up to the plan cap, for example $5,500 |
| Worst-case plan-related cost (excluding Part B premium and drugs) | About $2,200 | Up to the plan’s cap, as much as $9,250 in 2026 |
In a quiet year, the Advantage member comes out ahead. In a serious year, the Medigap member usually does. Which result you prefer depends on how much risk you can tolerate.
Doctors, Hospitals and Travel
With Original Medicare plus Medigap, you can see any doctor or hospital in the country that accepts Medicare, usually without referrals. That matters if you spend winters in another state or want to use a specialist center far from home.
Medicare Advantage plans work through networks. HMO plans tend to cover care only inside the service area and require referrals, while PPO versions allow out-of-network care at higher costs. Doctors and hospitals can leave a network at any time, and networks can change from year to year. Before choosing, search for each of your providers and call their offices to confirm they accept the specific plan. Because plans use prior authorization more often, ask which services need approval first. If a claim is denied, see how to appeal a denied claim.
Prescription Drugs and Extras
If you pick Medigap, you must enroll in a standalone Part D plan for medicines. In 2026, Part D has an annual out-of-pocket cap of $2,100 for covered drugs. Our guide to Part D prescription drug plans explains what to compare. Medicare Advantage plans typically bundle drug coverage into the plan, though you should check each formulary.
Advantage plans may also include dental, vision, hearing and gym benefits. They are real conveniences, but check the dollar limits, because a modest annual dental allowance may not go far. Medigap does not include these, so some buyers pair it with separate dental or vision coverage. See whether supplemental insurance is worth it to weigh add-ons.
The Timing Rules That Matter Most
Enrollment timing is the main reason this decision deserves care.
- Medigap open enrollment period: This six-month window begins the month you are 65 or older and enrolled in Part B. During it, insurers generally cannot deny you or charge more because of your health.
- After that window: In most states, insurers can ask health questions and may decline an application or charge more. A few states, including New York and Connecticut, offer broader guaranteed access, and some states have annual switching windows.
- Trial right: If you leave a Medigap policy to try Medicare Advantage for the first time, you may have a right to return to Medigap within 12 months in some situations. Confirm the rules before dropping a policy.
- Annual Enrollment Period: October 15 to December 7 each year, when you can join, switch or leave a Medicare Advantage or Part D plan. This window is open now for 2027 coverage.
- Medicare Advantage Open Enrollment: January 1 to March 31, for people already in an Advantage plan to switch plans or return to Original Medicare.
Switching from Advantage to Medigap later is possible, but you may not be guaranteed a policy at standard rates. That asymmetry is why many advisors suggest thinking about long-term health before choosing.
A Practical Way to Compare
- List your care. Write down your doctors, hospitals, regular tests and every medicine, with doses.
- Use the official plan finder. Medicare.gov lets you enter medicines and pharmacies to see estimated yearly drug costs for each plan.
- Price the quiet year and the bad year. Add premiums to expected copays for the first, then to the full cap or deductible for the second.
- Request Medigap quotes by plan letter. Because benefits are standardized, you can compare the same letter across companies and focus on price, rate-increase history and company reputation.
- Decide how much hassle you will accept. Referrals and approvals are minor to some people and a daily frustration to others.
Who Tends to Choose Which?
People who prefer Medigap often want freedom to choose providers, travel frequently, expect heavy use of care or value predictable costs. Those who pick Medicare Advantage often want lower premiums, extra benefits and a single card, and are comfortable with a network. Neither is universally better. Some people also have retiree coverage or Medicaid that changes the math, so check with your benefits administrator.
Free, unbiased counseling is available through State Health Insurance Assistance Programs (SHIP), reachable through Medicare.gov. Be cautious with unsolicited calls and ads promising rich benefits. Compare actual plan documents.
Frequently Asked Questions
Can I have Medigap and a Medicare Advantage plan together?
No. It is illegal to sell you a Medigap policy if you are in an Advantage plan. If you switch to Advantage, you would generally drop Medigap.
Does Medigap cover prescriptions?
No. You need a Part D plan for drug coverage.
Is Medicare Advantage cheaper?
It often costs less up front, but out-of-pocket costs can be higher if you need a lot of care.
What is the maximum I could pay in an Advantage plan?
For 2026, the in-network limit cannot exceed $9,250. Many plans set lower caps, and the cap excludes drug costs and extra benefits.
When should I buy Medigap?
Ideally during your six-month Medigap open enrollment period after you are 65 and in Part B.
Can I switch from Medicare Advantage to Medigap?
You can leave an Advantage plan during certain windows, but outside of guaranteed-issue situations an insurer may ask medical questions.
Does Medicare Advantage change every year?
Yes. Premiums, networks, benefits and formularies can change each January, so review the annual notice your plan sends.
Where do I find the 2027 numbers?
Some 2027 Medicare costs are announced in the fall. Check Medicare.gov for the current figures.
Bottom Line
Medigap vs Medicare Advantage comes down to predictability versus lower upfront cost, and freedom versus a managed network. If you want to see any Medicare provider and cap your risk, Medigap plus Part D is worth pricing. If you want lower premiums and bundled extras and can live with a network, Advantage may fit. Compare your actual doctors and medicines, mind the enrollment deadlines, and use Medicare.gov or a SHIP counselor for current details.
This article is for general informational purposes only and does not constitute medical, legal, or financial advice. Coverage rules, costs and guidelines change and vary by plan and state — consult a licensed healthcare professional or your insurer for guidance specific to your situation.
