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Is Medigap Worth the Extra Monthly Cost? A Practical Answer
Table of Contents
- What Medigap Actually Covers and Why It Costs More
- Medicare Advantage vs Medigap comparison chart
- How to calculate Medicare out-of-pocket costs for your own situation
- Medigap Plan G cost in 2026 and what drives your premium
- Who Gets the Most Value From Medigap, and Who Doesn't
- Mistakes That Make Medigap Look Worse Than It Is
- Running Your Own Numbers Before Your Next Enrollment Decision
- Frequently Asked Questions
Is Medigap Worth the Extra Monthly Cost? A Practical Answer
Last Updated: November 4, 2026
What Medigap Actually Covers and Why It Costs More
Medigap is a supplemental insurance policy sold by private companies to fill gaps in Original Medicare, the federal program that covers most Americans 65 and older. This guide starts with the basics: is Medigap worth the extra monthly cost? Medigap policies cover some of the costs Original Medicare leaves behind, such as Part A and Part B deductibles and coinsurance (What's Medicare Supplement Insurance (Medigap)?). The premium is the price you pay each month, and it is the most visible cost. The real question is whether that premium saves you more than it costs over the year.
Medigap policies are standardized. Each lettered plan, A through N, offers the same core benefits no matter which company sells it, so the comparison comes down to price and the company's rating method (Get Medigap Basics). Plan G is one of the most commonly chosen options because it covers nearly everything except the Part B deductible.
How Medigap premiums are calculated
Premiums depend on the carrier, the plan letter, your location and how the company prices its policies. Insurers use one of three main methods:
- Community rating: Everyone in the same area pays the same premium, regardless of age.
- Attained-age rating: Premiums rise as you get older.
- Issue-age rating: Your premium is set when you buy the policy and generally stays closer to that starting rate.
Each method leads to a different total cost over time, so the cheapest premium today is not always the cheapest policy over ten years.
Community rating, attained-age and issue-age pricing
Attained-age plans often look cheap at 65 and become expensive later. Community-rated plans usually start higher but rise more slowly. Issue-age plans tend to fall in between. Compare the same plan letter across all three rating methods, and check how each one changes over five and ten years, not just the first year.
Medicare Advantage vs Medigap comparison chart
A side-by-side comparison should line up the same categories for each path:
- Monthly premium. Medicare Advantage premiums are often low, and some plans advertise a $0 premium. Medigap premiums are usually higher and rise with age under attained-age rating. A $0 Medicare Advantage premium does not mean $0 care.
- Deductibles and copays. Medicare Advantage plans set their own copays for doctor visits, hospital stays and procedures. Medigap Plan G pays nearly all Part A and Part B costs after you pay the Part B deductible, so your cost per visit is close to zero once that deductible is met.
- Out-of-pocket maximum. Medicare Advantage plans have an annual in-network out-of-pocket maximum, and the amount varies by plan (What does Medicare cost?). Check each plan's current maximum with the carrier or on Medicare.gov. That is the single biggest structural difference between the two paths.
- Networks and referrals. Medicare Advantage HMO plans generally require referrals and in-network care except in emergencies. Medigap lets you see any provider who accepts Medicare nationwide, which matters if you travel or see specialists.
- Drug coverage. Most Medicare Advantage plans include Part D drug coverage. Medigap does not, so a Medigap buyer usually needs a separate stand-alone Part D plan and pays a separate premium.
- Prior authorization. Medicare Advantage plans commonly require prior authorization for procedures and some services. Original Medicare with Medigap generally does not.
A common pattern is that a healthy enrollee who stays in one area and takes few prescriptions can come out ahead on Medicare Advantage because the premium is low and the out-of-pocket maximum is never reached. To see which option fits your situation, read a direct comparison of Medicare Supplement and Medicare Advantage. An enrollee with a chronic condition, a specialist roster, or travel plans often finds that Medigap's higher premium is offset by near-zero cost sharing after the Part B deductible and by the absence of network rules.
Watch out: comparing a $0-premium Medicare Advantage plan to a Medigap Plan G premium is not a fair comparison unless you also add the Medicare Advantage plan's deductible, copays and out-of-pocket maximum to the Medicare Advantage side of the ledger. The premium is the entry price, not the total cost.
Run the comparison over a full year, not a single month. Add the annual premium, the deductible, expected copays or coinsurance, drug costs and any out-of-network costs for each path. The path with the lower premium is not always the path with the lower total cost of care, and the gap widens as health care use rises.
The article compares the two paths across the categories that drive total cost:
| Category | Medicare Advantage | Medigap Plan G |
|---|---|---|
| Monthly premium | Often low, sometimes $0 | Usually higher, rises with age under attained-age rating |
| Cost sharing | Copays set by each plan | Near zero after Part B deductible |
| Out-of-pocket maximum | Annual cap varies by plan | No annual cap on Part B coinsurance |
| Networks and referrals | Often requires in-network care and referrals | Any provider who accepts Medicare |
| Drug coverage | Usually included | Not included; separate Part D plan needed |
| Prior authorization | Commonly required | Generally not required |
How to calculate Medicare out-of-pocket costs for your own situation
Most articles stop at the monthly premium. The better framework is total cost of care: premium plus deductible plus coinsurance plus drug costs plus the cost of the care you actually expect to use. Build the estimate in four steps.
Step 1: Add up last year's use. Pull your Explanation of Benefits statements or your Medicare Summary Notice. Count doctor visits, specialist visits, outpatient procedures, hospital days, lab work and imaging. Add up your prescription costs. That history is the best predictor of next year's use, even though it is not a guarantee.
Step 2: Price each path against that use. For Original Medicare with Medigap, the math is mostly premium plus the Part B deductible plus your Part D premium and drug cost sharing. For Medicare Advantage, the math is premium plus the plan's copays for each service you used plus drug cost sharing, capped at the plan's annual out-of-pocket maximum. For Original Medicare alone, the math is premium plus the Part A and Part B deductibles, Part B coinsurance with no annual cap, and drug costs.
Step 3: Build two scenarios, not one. A healthy-year scenario uses your lowest-use year from the past five years. A chronic-year scenario uses your highest-use year, or a year that included a hospital stay or a new diagnosis. Compare the total for each path under both scenarios. The path that wins the healthy-year scenario is often not the path that wins the chronic-year scenario, and that difference is the real answer to whether Medigap is worth the extra monthly cost.
Step 4: Add the costs the premium hides. Medigap buyers usually need a stand-alone Part D plan, so add that premium. Medicare Advantage buyers may face prior authorization delays or out-of-network costs if they travel or see a specialist outside the network. Neither cost shows up in the headline premium.
A worked example makes the framework concrete. Suppose you are comparing a Medigap premium with a Medicare Advantage plan. In a chronic year with several specialist visits and one hospital stay, the Medigap path pays nearly everything after the Part B deductible, while a Medicare Advantage plan may reach its annual out-of-pocket maximum. In a healthy year with few doctor visits, the Medicare Advantage plan may cost much less in total.
Watch out: using a national average premium in this calculation will mislead you. Medigap premiums vary by carrier, plan letter, age, tobacco use and location, and the rating method (community, attained-age or issue-age) changes how the premium grows over ten years. Pull current quotes for your ZIP code from carriers or the Medicare plan finder at medicare.gov before you run the numbers.
A simple worksheet keeps the comparison honest:
- Annual Medigap or Medicare Advantage premium
- Annual Part D premium, if separate
- Deductibles you expect to pay
- Copays or coinsurance for the services you actually use
- Drug costs
- Out-of-network or travel costs, if any
- Total for the healthy-year scenario and the chronic-year scenario
If the Medigap total is lower than the alternative in the scenario that matches your health, Medigap is probably worth the extra monthly cost for you. If the alternative wins in both scenarios, the premium is hard to justify on cost alone, and the decision comes down to how much you value provider choice and predictable costs.
Medigap Plan G cost in 2026 and what drives your premium
Plan G is a common choice because it covers nearly all Part A and Part B costs after the Part B deductible. Premiums for Plan G vary by carrier, age, location and rating method. Because prices change each year, check current premiums directly with carriers or the official Medicare plan finder at medicare.gov rather than relying on any single figure. For current quotes, contact Your Medicare Advantage Guy directly.
Who Gets the Most Value From Medigap, and Who Doesn't
Medigap tends to make the most sense for people who:
- Take regular medications or see specialists often
- Want to keep any doctor who accepts Medicare
- Prefer predictable costs over the lowest premium
- Travel and want coverage outside a plan network
Medigap may be harder to justify for people who are very healthy, rarely see doctors and can afford unexpected bills. A lower-premium Medicare Advantage plan or a high-deductible Medigap option may fit better in that case.
Underwriting risk and why your health status matters
Some insurers ask about your health before approving a Medigap policy. Depending on your age and your state's rules, you may be denied or charged more if you have certain conditions. Guaranteed issue rights vary by situation and state; check the rules that apply to you with the carrier or your state insurance department before you apply.
Mistakes That Make Medigap Look Worse Than It Is
- Choosing only the lowest premium. A cheap attained-age plan can cost far more by your late 70s.
- Ignoring the Part B deductible. Plan G still leaves that deductible on you.
- Skipping the rating method. Two identical plan letters can have very different long-term costs.
- Comparing only one year. Look at five- and ten-year totals.
- Not checking drug coverage. Medigap does not cover prescription drugs, so you may need a separate Part D plan.
Running Your Own Numbers Before Your Next Enrollment Decision
Before you commit, work through your own numbers. Write down your annual premium, expected medical costs and the total for each option over the next few years. If Medigap's higher premium is still lower than your likely out-of-pocket costs, it is probably worth it for you. If not, a different plan may serve you better.
To get started, compare plan options through the official Medicare plan finder or request a free, no-obligation quote from Your Medicare Advantage Guy. Read more Medicare guidance on our blog for ongoing tips. When you're ready to compare actual numbers, request your free Medicare Advantage quote and an independent advisor can review your options with you.
Frequently Asked Questions
What is the disadvantage of Plan G?
The main disadvantage of Plan G is its higher monthly premium compared with high-deductible Medigap plans and Medicare Advantage. It also leaves you paying the Part B deductible yourself, which in 2026 is set by Medicare and should be checked on Medicare.gov. Plan G covers nearly all other gaps, so the trade-off is predictable monthly cost in exchange for near-complete coverage of cost sharing. Premiums vary by carrier, age, and location, so request quotes from several carriers before deciding. Because Medigap premiums are not standardized, comparing the same lettered plan across carriers can reveal large price differences.
Do doctors prefer Medigap or Medicare Advantage?
Doctors do not have a single preference, because the answer depends on whether each physician accepts the specific plan you hold. Medigap works with any provider that accepts Medicare, which is why many seniors keep their current doctors with it. Medicare Advantage plans use provider networks, so a doctor may be out of network. Before enrolling in either type, confirm in writing that your current doctors and preferred hospitals accept the plan. Medicare.gov's Plan Finder and the carrier directly can confirm network status.
What is the most popular Medicare supplemental plan?
Plan G is widely chosen by people who want broad coverage of Medicare cost sharing with a relatively predictable structure. Popularity varies by carrier and region, so there is no official national ranking to cite. Your best choice depends on your health, budget, and risk tolerance rather than what others select. Compare the lettered plans side by side using the standardized benefit information on Medicare.gov.
