Medigap Plans in Wisconsin: What Makes Your State Different

Wisconsin is one of only three states in the country -- along with Massachusetts and Minnesota -- that standardizes Medigap under its own system rather than the federal lettered-plan framework. If you are helping a parent in Wisconsin shop for Medicare supplement coverage, you cannot simply google "best Plan G" and apply what you find. Wisconsin's plans work differently, are named differently, and have a unique open enrollment structure that offers more annual flexibility than most states.

Understanding Wisconsin's system before your parent makes a Medigap decision can mean better coverage at a lower price and no unpleasant surprises when they need to use it.

Wisconsin's Medigap System: The Basics

In most states, Medigap policies are identified by federally standardized letter plans (A, B, D, G, K, L, M, N). Wisconsin operates under a different framework approved by the federal government. Instead of letter plans, Wisconsin uses a baseline "Basic Plan" with optional riders that can be added to customize coverage.

The Wisconsin Basic Plan

The Basic Plan is the foundation of all Wisconsin Medigap policies. It covers:

• Medicare Part A coinsurance for hospital days 61 through 90 (and the 60 lifetime reserve days)
• 365 additional hospital days after lifetime reserve days are exhausted
• Part A hospice coinsurance or copayment
• Part B coinsurance or copayment (20% that Medicare does not cover)
• Blood (first 3 pints)

What the Basic Plan does NOT cover without riders:

• Part A hospital deductible ($1,676 in 2026 per benefit period)
• Part B deductible ($257 in 2025)
• Skilled nursing facility coinsurance (days 21-100)
• Emergency care outside the United States
• Part B Excess Charges

This means the Basic Plan alone leaves significant exposure. A parent who has a hospitalization and is responsible for the Part A deductible -- which is not annual but per benefit period -- can face substantial out-of-pocket costs.

Wisconsin Optional Riders

To fill the gaps the Basic Plan leaves, Wisconsin offers standardized riders that can be attached to the Basic Plan. The key riders to understand are:

Part A Deductible Rider: Covers the Part A hospital deductible. Given that this deductible resets with each new benefit period and a seriously ill parent could face it multiple times in a year, this rider is almost always worth the additional premium.

Skilled Nursing Facility Care Rider: Covers the daily coinsurance for days 21 through 100 in a skilled nursing facility (SNF). Without this rider, your parent owes $209.50 per day for days 21-100 in 2026. A 60-day SNF stay following a stroke or hip fracture -- a common post-hospitalization scenario -- would cost over $12,000 out of pocket without coverage.

Part B Deductible Rider: Covers the annual Part B deductible ($257 in 2025). Note: as with Plan F in other states, insurers in Wisconsin cannot sell the Part B deductible rider as a standalone to beneficiaries who became eligible for Medicare after January 1, 2020. This change was made at the federal level to discourage overutilization. If your parent enrolled before 2020, they may still be able to obtain or keep this rider.

Fifty Percent Part A Deductible Rider: Covers 50% of the Part A deductible, offered as a less expensive alternative to full coverage.

Catastrophic Part B Rider: Covers all Part B costs after the beneficiary has paid $6,000 out of pocket in a calendar year. This provides a backstop for very high-cost years without requiring the full premium of a comprehensive rider package.

Foreign Travel Emergency Rider: Covers 80% of emergency medical costs during foreign travel (after a $250 deductible), up to $50,000 lifetime. Relevant for parents who travel internationally.

Excess Charges Rider: Covers Part B Excess Charges -- the up to 15% surcharge that non-participating providers can legally charge above the Medicare-approved rate. In Wisconsin, while most major providers accept Medicare assignment, this rider provides protection against the minority that do not.

Wisconsin's Open Enrollment and Switching Rules

Like all states, Wisconsin provides a federal baseline: a 6-month Medigap Open Enrollment Period beginning when a beneficiary turns 65 and is enrolled in Medicare Part B. During this window, insurers must offer any available policy without medical underwriting.

Beyond that, Wisconsin provides additional protections:

Wisconsin's Annual Open Enrollment Period

Wisconsin law gives Medigap policyholders an annual open enrollment period during which they can switch to a Medigap policy of equal or lesser value from any insurer without medical underwriting. This window runs from January 1 through March 31 each year.

This is functionally similar to California's birthday rule, but on a fixed calendar schedule rather than tied to individual birthdays. Every Wisconsin Medicare beneficiary with a Medigap plan has the same three-month window to comparison-shop and switch.

In practical terms: every January, you should pull Medigap quotes from multiple Wisconsin insurers for your parent's current coverage level (their current Basic Plan plus whatever riders they carry). If a competitor offers the same coverage for less, your parent can switch without penalty or health screening.

Guaranteed Issue After Losing Coverage

Wisconsin also provides guaranteed issue rights when a beneficiary involuntarily loses Medigap or employer coverage. If your parent's Medicare Advantage plan leaves their service area or your parent loses employer coverage, they have the right to buy a Medigap Basic Plan (plus certain riders) from any insurer without underwriting.

How to Compare Wisconsin Medigap Plans

Because Wisconsin's plan structure is different from other states, plan comparison requires a different approach than the standard "compare Plan G quotes" method used elsewhere.

Step 1: Start with the Basic Plan plus essential riders. For most parents, a comprehensive Wisconsin Medigap policy should include the Basic Plan plus at minimum: the Part A Deductible Rider and the Skilled Nursing Facility Care Rider. This covers the two most significant financial exposures beyond the Part B 20% coinsurance.

Step 2: Evaluate the Part B Deductible Rider. If your parent is eligible (enrolled in Medicare before 2020), weigh the rider premium against the $257 annual deductible. In most cases, if the rider costs less than $22/month, it may be worth it for the predictability. If it costs more, skipping it and paying the deductible directly is usually more economical.

Step 3: Get quotes from multiple insurers. Wisconsin insurers vary significantly in their pricing for the same benefit package. Companies that actively market in Wisconsin include Anthem, Mutual of Omaha, Cigna/Loyal American, American Family Life, and others. Quotes from at least four to five insurers are necessary to understand the market range.

Step 4: Check pricing methodology. Ask each insurer whether their policies are attained-age rated (premiums increase with age), issue-age rated (premiums based on age at purchase), or community rated (same premium for all ages). Issue-age rated and community-rated policies typically offer better long-term value if your parent does not plan to switch frequently.

Step 5: Review the January annual enrollment window. Even after your parent is enrolled, calendar a review every December so you have time to comparison-shop before the January 1 window opens.

Wisconsin Medigap vs. Medicare Advantage

Wisconsin, like other states, has an active Medicare Advantage market. Plans are available in most counties, often with $0 premiums and supplemental benefits for dental, vision, and hearing. For healthy parents on tight budgets, Medicare Advantage is appealing.

The same cautions that apply nationally apply in Wisconsin:

Network restrictions: Medicare Advantage HMOs require your parent to use in-network providers. If your parent sees a specialist at a major academic medical center (like UW Health in Madison or the Medical College of Wisconsin in Milwaukee), verify that provider is in the plan's network before enrolling.

Prior authorization: Medicare Advantage plans require prior authorization for many procedures, specialist referrals, and skilled nursing facility admissions. For a parent managing a chronic condition or recovering from surgery, administrative denials and appeals can delay care.

The switching problem: If your parent starts on Medicare Advantage and later wants to move to Original Medicare plus a Wisconsin Medigap plan, they will generally need to go through medical underwriting. The annual open enrollment window Wisconsin provides applies to existing Medigap policyholders -- it does not guarantee issue rights for someone transitioning from Medicare Advantage. A parent with significant health conditions may be denied Medigap coverage if they try to switch later.

Using Wisconsin's SHIP Program

Wisconsin's State Health Insurance Assistance Program is called GWAAR Medicare Counseling Services and is coordinated through the Greater Wisconsin Agency on Aging Resources. Counselors provide free, unbiased, one-on-one assistance with Medigap shopping, plan comparisons, and enrollment questions.

To reach Wisconsin's SHIP counselors, call 1-800-242-1060 or visit the Wisconsin SHIP website. During the January annual enrollment window, counselors are in high demand -- contact them in December to schedule an appointment before the rush.

Common Mistakes Wisconsin Families Make

Buying the Basic Plan without riders. The Basic Plan alone leaves substantial exposure. A parent who has a hospitalization and no Part A deductible rider could face $1,676 out of pocket, potentially multiple times in one year. Always evaluate riders at enrollment.

Not using the annual enrollment window. Most Wisconsin policyholders do not know the January 1 through March 31 open enrollment period exists. Every year that passes without comparison-shopping is potentially hundreds of dollars in premium overpayment.

Assuming all insurers charge the same price. Because the plans are standardized in Wisconsin, families sometimes assume pricing is uniform. It is not. Premium variation for identical coverage can be significant across insurers.

Not checking whether the parent's doctors are in-network before choosing Medicare Advantage. Wisconsin has several major health systems with strong affiliations. Some Medicare Advantage networks in Wisconsin exclude major systems like UW Health or specific physician groups. Verify the network before enrollment, not after.

Next Steps

Wisconsin's Medigap system is different enough from other states that general Medicare advice often does not apply directly. The annual enrollment window is a meaningful protection that can save your parent money every year -- but only if you know to use it.

Our Medicare Enrollment Guide covers Medigap selection, how to compare coverage effectively, and a systematic annual review process. For Wisconsin families managing a parent's Medicare, it provides the framework to make these decisions with confidence rather than guesswork.