Medicare Supplement Plans: Compare Costs and Coverage

Medicare Supplement plans, also called Medigap, help pay the deductibles, copayments, and coinsurance that Original Medicare leaves to you. Choose the benefits you want first, then compare insurers selling that same plan letter. A higher premium does not buy broader standardized benefits within the same letter.

Start with three questions: How much can you comfortably pay each month? How much could you absorb during a year with frequent medical care? Can you enroll without medical underwriting? Those answers matter more than a carrier’s name.

Where Medicare Supplement fits

Original Medicare consists of Part A, hospital insurance, and Part B, medical insurance. Generally, you need both to buy Medigap. Medigap supplements that coverage: Medicare pays first, and the policy pays its share afterward. Each person needs a separate policy. Medicare Advantage, or Part C, is another way to receive Medicare benefits; Medigap cannot pay its copayments or deductibles.

New Medigap policies do not include prescription drug coverage. Compare standalone Part D coverage separately, taking any existing drug coverage into account. Medigap also generally excludes routine dental and vision care, hearing aids, and long-term custodial care.

To decide whether Medigap is worth the premium, weigh the added bill against your ability to pay uncovered medical expenses. Original Medicare alone has no annual out-of-pocket ceiling. Medicare Advantage has an annual limit for covered Part A and Part B services, but may have provider networks and different cost sharing. Existing employer or retiree coverage may already fill important gaps, so review it before adding insurance.

Compare the plan benefits before the price

In most states, Medigap uses letters A–D, F, G, and K–N. Massachusetts, Minnesota, and Wisconsin standardize coverage differently, so residents need their state’s comparison. Medigap plan letters are different from Medicare parts.

For a manageable starting comparison, consider standard G and N, plus F if eligible. All three cover the Part A deductible, hospital coinsurance with up to 365 additional hospital days after Medicare benefits end, and Medicare-covered skilled nursing facility coinsurance. Here are their main differences.

Plan G coverage and remaining costs should be evaluated separately from the quoted premium. Standard G leaves you the Part B deductible, which is $283 in 2026, plus premiums and expenses outside the policy’s coverage. That can appeal to someone who wants fewer variable bills for covered care.

Plan N benefits and copays require a closer look at how you use care. You can owe up to $20 for some office visits and up to $50 for an emergency room visit without inpatient admission. Ask providers whether they accept Medicare assignment, meaning the approved amount as full payment; this helps avoid excess charges.

Other letters deserve consideration when their premiums fit your budget. For example, K and L leave you a percentage of certain expenses and have annual out-of-pocket limits; compare their full benefit chart before choosing them.

Is high-deductible G a practical alternative?

When reviewing high-deductible Plan G costs and tradeoffs, focus on available cash as well as premiums. Its 2026 deductible is $2,950 in qualifying out-of-pocket expenses before the supplement pays benefits. Medicare still pays its share. Premiums do not count toward that deductible.

A lower quoted premium can make sense if you can comfortably fund that exposure. Compare a low-use year and a year when you reach the deductible. This is a different cost arrangement from standard G, and the deductible is not a ceiling on every health expense.

Should an eligible Plan F owner switch?

Plan F is unavailable to people first eligible for Medicare on or after January 1, 2020. Earlier eligibility may allow a purchase.

For eligible readers, Plan F versus Plan G value comes down largely to the premium difference and F’s payment of the Part B deductible. If F costs more than $283 extra annually in 2026, its extra standardized benefit cannot offset that difference that year. This is a benefit calculation, not confirmation that you qualify to switch. Check acceptance and effective dates before canceling existing coverage.

What determines your monthly premium?

Your monthly Medicare Supplement costs depend on the plan, insurer, location, applicable discounts, and underwriting circumstances. Compare the same coverage using your own details; an advertised starting price is not your confirmed rate. Premiums can increase, and the Medigap premium is separate from Part B.

Ask which pricing method applies to the policy in your state:

• Community-rated pricing does not base the premium on age.
• Issue-age pricing uses your age when you buy.
• Attained-age pricing uses your current age and rises as you get older.

All three can have increases for other reasons. Ask for recent rate history for the specific policy, while recognizing that past increases cannot predict future ones.

Confirm Medigap household discount eligibility from the insurer’s written rules. Ask whether another household member must also enroll, what proof is required, and what happens if household circumstances change. Request the premium both with and without the discount. Marriage or a shared address should not be treated as automatic approval.

For your full budget, add Part B, any Part A premium you owe, Part D premiums and drug expenses, and uncovered care. The standard Part B premium is $202.90 monthly in 2026; income-related charges can make it higher.

Compare a full year of spending

When comparing Plan G with Plan N, convert the monthly premium difference into an annual amount, then subtract N’s additional copays and any excess charges.

Here is a hypothetical 2026 calculation, not available rates or a personalized quote. Assume G costs $160 monthly and N costs $125. The same person incurs the full Part B deductible under either plan. Afterward, assume eight office visits with $20 N copays, one emergency room visit with a $50 N copay and no inpatient admission, and no excess charges.

N saves $210 under these assumptions: $420 in premiums minus $210 in additional copays. More qualifying visits or excess charges would reduce that advantage. This is not a total health care budget: Part B premiums, Part D, prescriptions, and uncovered services are excluded.

The practical approach to finding affordable Medicare Supplement coverage is to compare annual spending, renewal affordability, and enrollment eligibility together. If a lower premium would leave you unable to handle the corresponding medical bills, it may not solve your budget problem.

Check your right to enroll before changing coverage

Your federal Medigap Open Enrollment Period lasts six months, starting the first month you are both 65 or older and enrolled in Part B. During it, insurers cannot deny an offered policy or charge more because of health problems. Afterward, medical underwriting can lead to a higher price or denial unless a protection applies.

The October 15–December 7 annual Medicare enrollment period permits health and drug coverage changes effective January 1. It does not generally guarantee a right to buy Medigap without underwriting. Returning from Medicare Advantage to Original Medicare and obtaining a supplement are separate decisions.

Certain coverage losses and trial rights can create guaranteed issue protections. State law may provide additional opportunities; under-65 access also varies because federal law generally does not require insurers to sell Medigap before 65. Check the specific qualifying event, permitted plans, and deadline with your state insurance department.

Before replacing coverage, get written acceptance, the effective date, and any applicable waiting-period terms. A quote alone is not approval. Standardized policies renew automatically despite health changes; renewal does not freeze the premium.

Check travel needs and SELECT restrictions

Medigap coverage for snowbirds starts with Original Medicare’s ability to cover care from Medicare-accepting providers nationwide. Confirm that providers at both homes accept Medicare.

A permanent move deserves a separate review. You can generally keep standard Medigap while retaining Original Medicare, but ask the insurer about address and premium changes. Switching to another policy may involve underwriting.

Medicare SELECT network tradeoffs matter when comparing an unusually low premium. SELECT is Medigap, with hospital and sometimes doctor network requirements for full nonemergency benefits. It is not Medicare Advantage. Verify hospitals near both residences and what you would owe outside the network.

For international travel, standard G and N’s foreign emergency benefit generally pays 80% of eligible charges after a $250 annual deductible, with a $50,000 lifetime limit. The emergency must begin within the trip’s first 60 days, and Medicare must not otherwise cover the care. That is limited emergency protection, not comprehensive overseas insurance.

Get comparable quotes and choose a policy

Request Medicare Supplement rate quotes for the same applicant, plan letter, ZIP code, tobacco status, discount assumptions, and effective date. Include age and any other rating details the insurer requires. Date each quote and keep standard, high-deductible, and SELECT options clearly identified. For a 2027 start date, obtain a quote effective in 2027 and check official 2027 Medicare amounts once released; the 2026 figures above are not forecasts.

For each finalist, collect the written premium, underwriting decision or applicable enrollment protection, discount terms, and coverage summary. Ask about rate history, billing, and claims assistance. Check complaints through your state insurance department, and compare more than one insurer selling your chosen letter.

Your next step is to obtain matching quotes for the benefits you can afford to keep, calculate both routine-year and higher-use spending, and confirm eligibility before selecting the policy and start date.