medicare supplement plans - medigap coverage 2027 online

The first decision is Original Medicare or Medicare Advantage

Medigap only supplements Original Medicare. If you choose Medicare Advantage, the private Medicare Advantage plan administers your Part A and Part B benefits, and a Medigap policy cannot pay that plan’s premiums, deductibles or copayments. If you choose Original Medicare, a Medigap policy may help cover specified Part A and Part B cost sharing according to its standardized benefits.

Do not buy Medigap merely because you are considering leaving Medicare Advantage. First confirm that you have a valid opportunity to return to Original Medicare, determine whether you have a Medigap open-enrollment, guaranteed-issue, trial or state-law right, and coordinate all effective dates. An opportunity to leave Medicare Advantage does not automatically guarantee acceptance into every Medigap policy.

Quick facts

What Medicare Supplement insurance does—and does not do

Supplements Original Medicare

Medigap pays according to its policy after Original Medicare decides whether a Part A or Part B service is covered and processes the claim.

Standardized by plan letter

In most states, policies with the same letter provide the same basic standardized benefits even when different insurance companies sell them.

Timing affects acceptance

The federal six-month Medigap Open Enrollment Period is generally a one-time window. Later applications may face underwriting unless another protection applies.

This quick-facts table distinguishes Medigap from other Medicare coverage. It is a planning summary rather than a promise that a particular insurer, policy or rate is offered to every applicant.

Medicare Supplement planning facts to verify before applying
Topic	What Medigap generally means	What to verify
Coverage foundation	You stay in Original Medicare Part A and Part B; Medigap supplements eligible cost sharing.	Part A and Part B effective dates and whether Original Medicare will be the medical arrangement.
Plan letters	Ten standardized plan types are used in most states: A–D, F, G and K–N.	Which letters are sold, which you are eligible to buy and how your state standardizes policies.
Different state systems	Massachusetts, Minnesota and Wisconsin standardize Medigap differently.	The state-specific benefit structure and consumer protections.
Provider access	A standard policy generally follows Original Medicare rather than creating a separate medical network.	Whether each provider takes Medicare, accepts the patient and provides the service; Medicare SELECT can differ.
Prescription drugs	Medigap policies sold after 2005 do not include outpatient prescription drug coverage.	Whether a separate Part D plan or other creditable drug coverage is needed.
One-person policy	A Medigap policy covers one person.	Each spouse’s separate eligibility, application, plan choice and premium.
Enrollment window	The federal Medigap Open Enrollment Period lasts six months beginning the first month a person is 65 or older and enrolled in Part B.	The exact starting month, any guaranteed-issue right and additional state protections.
Premium	The insurer sets the premium, which can differ for the same plan letter.	Current rate, rating method, lawful discounts, rate history and future increase factors.

Medigap does not create coverage for a service that Original Medicare determines is not covered. It is not long-term-care insurance and generally does not cover routine dental care, routine vision care, hearing aids, eyeglasses or private-duty nursing. Some policies include a limited foreign-travel emergency benefit, but that is not comprehensive international medical insurance.

Coverage comparison

How standardized Medigap plan letters differ

Standardization makes the benefit comparison more disciplined. In most states, Plan G from one insurance company has the same basic standardized medical benefits as Plan G from another. The same rule applies when comparing another identical letter. Premiums and company administration can differ, but an insurer cannot rename a weaker benefit package “Plan G” and sell it as though it were the standardized plan.

The letters are not quality grades. Plan A is not automatically better than Plan B, and Plan G is not ranked seventh. Each letter represents a defined combination of benefits. Start with the cost-sharing gaps you want the policy to address, then compare insurers selling that same letter.

Common Medigap plan structures for 2027 planning
Plan structure	General standardized approach	Decision questions
Plan G	Covers the standardized benefit gaps assigned to Plan G but does not pay the annual Part B deductible.	Is the premium sustainable, and does the applicant value broad standardized cost-sharing protection after the Part B deductible?
Plan N	Uses a strong standardized benefit package but permits specified Part B copayments and does not cover Part B excess charges.	How often will care be used, do providers accept Medicare assignment, and does the premium difference justify the remaining cost sharing?
High-deductible Plan G	Requires the beneficiary to reach an annually adjusted high deductible before the standardized Plan G benefits begin paying.	Can the applicant comfortably handle higher early-year exposure in exchange for a potentially different premium structure?
Plans K and L	Pay percentages of certain covered cost sharing until an annual out-of-pocket limit and the Part B deductible requirements are met.	Does the applicant understand the percentage sharing, expenses that count toward the limit and the current annual limit?
Plans A, B, D and M	Offer different standardized combinations of Part A and Part B cost-sharing benefits.	Which gaps remain under the exact letter, and is the policy actually offered to the applicant?
Plans C and F	Include the Part B deductible benefit but are not available to people who first became eligible for Medicare on or after January 1, 2020.	Did the person become eligible before 2020, does the insurer offer the policy and does the applicant have a purchase right?
Medicare SELECT	A Medigap form that can require use of a defined network for full benefits, except in protected situations such as emergencies.	Are the required hospitals and providers accessible, and how does the policy differ from standard Medigap?

Plan G versus Plan N requires a usage comparison

Plan G and Plan N are often compared because both offer substantial standardized protection. The choice should not be reduced to “higher premium versus lower premium.” Under Plan N, specified office and emergency-room copayments may apply, and Part B excess charges are not covered. Under Plan G, the standardized policy covers Part B excess charges but still does not cover the Part B deductible.

Estimate the annual premium difference, expected office and emergency use, provider assignment practices and tolerance for point-of-service costs. Also compare long-term rate considerations. A lower introductory premium does not guarantee a lower cost over several years, and a more comprehensive standardized benefit does not automatically justify any premium.

Original Medicare still controls the medical coverage decision

For a standard Medigap claim, Original Medicare first determines whether the service is covered and what amount is approved. The Medigap policy then pays according to its standardized benefits. This is why a provider’s acceptance of Medicare and the Medicare coverage rules matter. Medigap does not override medical necessity decisions, expand Medicare’s benefit categories or convert noncovered long-term custodial care into a covered service.

Pricing and long-term fit

What affects Medicare Supplement premiums

Medigap premiums can vary widely among insurance companies even when the policies have the same standardized letter. The comparison must therefore hold the plan letter constant. Comparing Plan G from one insurer with Plan N from another mixes a benefit decision with a company-pricing decision and does not show which insurer charges less for equivalent standardized coverage.

Insurers can use different lawful rating methods. A community-rated policy generally does not base the premium on age, although premiums can change for other reasons. An issue-age-rated policy bases the starting premium on age when the policy is purchased and does not increase solely because the policyholder gets older, although other increases can occur. An attained-age-rated policy can increase as the policyholder ages and can also change for other reasons. State rules affect which methods are permitted.

Premium factors to compare for the same Medigap plan letter
Pricing factor	Why it matters	What to request or confirm
Rating method	Community, issue-age and attained-age rating can produce different premium paths over time.	The policy’s rating method and how age is treated under current state rules.
Location	Premiums and insurer offerings can differ by state and rating area.	The rate for the applicant’s residential ZIP code and the address rules for future moves.
Applicant information	Age, tobacco use, sex and other lawful rating factors can affect the premium, depending on state rules and timing.	The insurer’s approved rating factors and the information used in the quote.
Enrollment protection	During protected periods, an insurer cannot use health status to deny coverage or charge more in the ways prohibited by law.	Whether open enrollment, guaranteed issue, a trial right or state protection applies and what proof is required.
Discounts	Some insurers offer lawful household, payment-method or other discounts, but terms differ.	Eligibility, duration, conditions and the premium without the discount.
Rate history	A current premium is only a starting point and does not predict every future increase.	Approved rate information that is available, recognizing that past changes do not guarantee future results.
Household total	Each person needs an individual Medigap policy and premium.	The separate rate and eligibility for each spouse, plus separate Part D costs if applicable.

Total planning should include more than the Medigap premium. Continue the Part B premium, add the chosen Medigap premium, include a separate Part D premium and prescription costs when drug coverage is needed, and budget for services Medigap generally does not cover. Dental, vision, hearing, long-term-care and international-travel needs may require separate decisions.

A standardized benefit is not a standardized premium

For the same letter, compare the exact monthly premium, rating method, lawful discounts, enrollment status and insurer information. Do not assume that the most recognized brand has the lowest rate or that the lowest current rate will remain the lowest.

Enrollment and underwriting

Medigap does not have a universal annual fall open enrollment

The federal Medigap Open Enrollment Period lasts six months. It begins the first month a person is age 65 or older and enrolled in Medicare Part B. During that period, an insurer cannot refuse to sell an applicant any Medigap policy it offers because of pre-existing health problems and cannot charge more because of those health problems. This window is generally one-time and does not repeat every October.

After that six-month period, the applicant may have fewer options, may pay more or may be denied under medical underwriting unless a guaranteed-issue right or other protection applies. State law can provide additional rights, including different opportunities to change policies. The applicant’s state and exact circumstances must be checked rather than relying on a national generalization.

Guaranteed-issue rights can arise in defined situations, such as certain losses of coverage, plan terminations, service-area changes or trial-right circumstances. The right can be limited to specific policy letters and application periods. Keep termination letters, notices, proof of prior coverage and enrollment confirmations because an insurer may require evidence that the protection applies.

Federal law generally does not require insurers to sell Medigap policies to people younger than 65 who have Medicare because of disability or end-stage renal disease. Some states provide broader access. A person who had Medicare before 65 generally receives a new federal six-month Medigap Open Enrollment Period when turning 65 and enrolled in Part B, but current state and federal rules should be confirmed.

Switching from Medicare Advantage requires two separate answers

First, determine whether Medicare rules permit the person to leave Medicare Advantage and return to Original Medicare for the intended date. Second, determine whether a Medigap insurer must accept the application or whether underwriting applies. A Medicare Advantage election period answers the first question; it does not automatically create a Medigap purchase right.

It is generally illegal to sell Medigap to someone known to be enrolled in Medicare Advantage unless the person is switching back to Original Medicare and the Medicare Advantage coverage will end before the Medigap effective date. Do not cancel current coverage until the new arrangement, acceptance and effective dates have been confirmed.

Part D needs its own enrollment decision

Medigap policies sold after 2005 do not include prescription drug coverage. Someone returning to Original Medicare may need a separate Part D plan unless another source of creditable drug coverage applies. Part D uses Medicare election periods and has its own late-enrollment penalty rules. Coordinate the Original Medicare, Medigap and Part D effective dates instead of assuming one application completes all three steps.

Two coverage paths

Medigap with Original Medicare versus Medicare Advantage

Medigap and Medicare Advantage are not two versions of the same policy. The Medigap path keeps Original Medicare as the medical foundation and adds a supplement for specified cost sharing. The Medicare Advantage path receives Part A and Part B benefits through a private Medicare plan and may include Part D and supplemental benefits. Only one medical structure can be active at a time.

Coverage-path differences to review before choosing
Decision area	Original Medicare plus Medigap	Medicare Advantage
Medical administration	Original Medicare processes Part A and Part B claims; Medigap pays according to its policy.	The private Medicare Advantage plan administers covered Part A and Part B services.
Providers	A standard policy generally follows Original Medicare; verify that the provider takes Medicare and accepts the patient.	Network and out-of-network rules depend on the exact HMO, PPO or other plan type.
Prior authorization	Original Medicare coverage rules control; some Medicare prior-authorization programs can still apply.	Plan-specific prior authorization and referral rules may apply.
Prescription drugs	A modern Medigap policy does not include Part D; evaluate a separate compatible drug plan.	Many plans include Part D, but the exact plan must be checked.
Cost structure	Separate Part B, Medigap and usually Part D premiums, with remaining costs based on the selected policies.	Part B premium, any plan premium, service-level medical and drug costs and a medical annual limit.
Extra benefits	Medigap generally does not include routine dental, vision, hearing or long-term custodial care.	The exact plan may offer additional benefits with plan-specific limits and eligibility.
Changing later	Federal and state Medigap purchase rights, underwriting and policy availability control.	Medicare election periods and the exact plan service area control changes.

The supplied Wellcare pathway is included only as a Medicare Advantage alternative. It does not quote Medicare Supplement insurance, return a person to Original Medicare, arrange a stand-alone Part D plan or compare every plan available. Use the Medicare assistance form when the goal is to review Medigap or coordinate a broader Original Medicare arrangement.

Practical comparison

Information to gather before requesting a Medicare Supplement quote

A useful comparison starts with eligibility and the same plan letter—not a list of carrier logos. Share Medicare numbers and health information only through an appropriate secure process when required for eligibility, underwriting or an application.

Confirm the coverage path

Verify that the applicant will have Original Medicare Part A and Part B rather than Medicare Advantage on the intended Medigap effective date.

Establish the purchase right

Identify the six-month open-enrollment window, guaranteed-issue protection, trial right, state rule or underwriting status that applies.

Select the standardized letter

Compare which Original Medicare cost-sharing gaps each eligible plan letter covers before comparing insurers.

Compare equivalent policies

Request rates for the same letter using the same applicant profile, address, effective date, tobacco status and discount assumptions.

Review long-term affordability

Ask about the rating method, current premium, available rate history and how lawful discounts affect the quoted amount.

Coordinate Part D and other gaps

Determine whether a separate Part D plan and separate dental, vision, hearing, travel or long-term-care coverage decisions are needed.

Confirm acceptance and dates

Keep the application, policy delivery, acceptance notice and effective-date confirmation before ending existing protection.

Quote and enrollment checklist

Permanent residential address, state and ZIP code.
Medicare Part A and Part B effective dates.
Current Original Medicare, Medicare Advantage, Medigap, Medicaid, employer, retiree or union coverage.
Desired Medigap effective date and the reason coverage is being requested.
Evidence of a guaranteed-issue, trial or other protected right when applicable.
Preferred standardized plan letter and any suitable alternative letters.
Tobacco status and other lawful rating information requested by the insurer.
Expected premium-payment method and potential discount qualifications.
Prescription list and pharmacy preferences for a separate Part D review.
Written confirmation before replacing an existing Medigap policy or leaving Medicare Advantage.

Related Medicare guides

Frequently asked questions

Medicare Supplement plan FAQs

What is a Medicare Supplement plan?

Medicare Supplement Insurance, or Medigap, is private insurance that helps pay specified out-of-pocket costs in Original Medicare, such as certain deductibles, copayments and coinsurance. It supplements rather than replaces Original Medicare.

Do I need Medicare Part A and Part B to buy Medigap?

Generally, yes. You must have Original Medicare Part A and Part B to buy and use a Medigap policy. The policy pays according to its terms after Medicare processes eligible Part A and Part B claims.

Are benefits the same for every insurer’s Plan G?

In most states, the basic standardized Plan G benefits are the same regardless of the insurance company. Premiums, rating method, underwriting, discounts, availability and company administration can differ. Massachusetts, Minnesota and Wisconsin use different standardization systems.

What is the main difference between Plan G and Plan N?

Both offer substantial standardized protection, but Plan N permits specified office and emergency-room copayments and does not cover Part B excess charges. Plan G covers Part B excess charges but does not cover the annual Part B deductible. Compare premiums and expected use.

Can someone newly eligible for Medicare buy Plan F?

A person who first became eligible for Medicare on or after January 1, 2020 cannot buy Plan F or Plan C. Someone eligible before that date may be able to buy one if an insurer offers it and the applicant otherwise qualifies.

Does Medigap include prescription drug coverage?

Modern Medigap policies do not include outpatient prescription drug coverage. Policies sold after 2005 exclude it. A beneficiary may need a separate Part D plan unless another source of creditable drug coverage applies.

Can I have Medigap and Medicare Advantage together?

No. Medigap supplements Original Medicare and cannot pay Medicare Advantage premiums, deductibles or copayments. A Medigap policy may be arranged for a future effective date when someone is validly returning to Original Medicare, but effective dates must not overlap as competing medical arrangements.

Does Medigap have an annual October 15–December 7 enrollment period?

No. The federal Medigap Open Enrollment Period is generally a one-time six-month window beginning the first month a person is age 65 or older and enrolled in Part B. Medicare’s fall enrollment period does not automatically create a Medigap purchase right.

Can an insurer ask health questions after Medigap open enrollment?

It may be allowed to use medical underwriting after the protected window unless a guaranteed-issue or other right applies. State law can provide additional protections. Verify the applicant’s timing and state rules before replacing or dropping coverage.

Can I switch Medigap insurers whenever I want?

You can apply, but federal law generally does not guarantee the right to switch at any time. The new insurer may use underwriting unless the applicant is still in open enrollment or has another protected right. Do not cancel the current policy until the replacement is accepted and effective.

Can someone younger than 65 buy Medigap?

Federal law generally does not require insurers to sell Medigap to Medicare beneficiaries under 65. Some states require or permit broader access. Check current state insurance rules and insurer offerings for the applicant’s circumstances.

Does the Wellcare button provide Medicare Supplement quotes?

No. The supplied Wellcare pathway is limited to current carrier-specific Medicare Advantage options. It does not quote or enroll someone in Medigap, return someone to Original Medicare, or compare every available Medicare option.

Does the Blake Insurance Group form enroll me?

No. The form requests contact from a licensed insurance agent about Medicare insurance options. A Medigap policy requires a separate application, eligibility review, insurer acceptance and confirmed effective date.

Is Blake Insurance Group connected with Medicare?

No. Blake Insurance Group LLC is an independent insurance agency and is not connected with or endorsed by the United States government or the federal Medicare program.

Compare the right plan letter before comparing insurers

Start with Original Medicare compatibility and enrollment rights. Then compare equivalent standardized policies using the same address, applicant information and effective date. Include a separate Part D review when prescription coverage is needed. If Medicare Advantage may be a better structural fit, evaluate it as a separate alternative rather than trying to combine it with Medigap.

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