Medicare Supplement Plans Hawaii: Coverage and Costs

What is a Medicare Supplement Plan (Medigap)?

A Medicare Supplement plan, more commonly known as Medigap, is a private insurance policy designed to cover the various out-of-pocket costs that Original Medicare (Parts A and B) does not pay. These expenses include deductibles, coinsurance, and copayments, potentially saving beneficiaries from significant healthcare bills. The goal of Medigap Hawaii plans is to “fill in the gaps” left by Original Medicare, which can be substantial given the cost-sharing structure of federal health insurance for seniors.

To enroll in a Medigap plan, you must first be covered by both Medicare Part A (hospital insurance) and Part B (medical insurance). Medigap policies don’t replace Original Medicare-they supplement it. For example, in 2024, the Medicare Part A hospital deductible is $1,632 (and rising to $1,676 in 2025). The Part B coinsurance generally requires beneficiaries to pay 20% of approved amounts after meeting a $283 deductible (projected for 2026). Medigap Hawaii plans are especially valuable as they can cover many of these costs, such as:

• Medicare Part A and B deductibles
• Up to 365 additional hospital days after Medicare benefits are used up
• Part B coinsurance payments
• First three pints of blood needed for medical procedures
• Skilled nursing facility coinsurance (for select plans)
• Foreign travel emergency coverage (for select plans)

While Medigap offers comprehensive cost coverage, it’s important to note that it does not include prescription drug coverage, dental, vision, or hearing benefits. For prescription drugs, Medicare beneficiaries should pair their Medigap plan with a stand-alone Medicare Part D plan.

If you’re interested in detailed steps for managing Medicare coverage or switching plans, you can review advice on how to cancel Medicare coverage before making changes.

Available Standardized Medigap Plans in Hawaii

Medigap plans in Hawaii are standardized in alignment with federal guidelines. This means that each plan, identified by a letter (e.g., A, F, G, N), offers the same benefits no matter which insurer provides it. However, monthly premiums may differ based on the insurance company, personal factors, and your location within the state.

Plan	Key Features
Plan A	Basic benefits only; does not cover the Part A hospital deductible or skilled nursing coinsurance.
Plan F	Most comprehensive; covers all Medicare-approved costs, including both Part A and Part B deductibles. Only available to those first eligible for Medicare before January 1, 2020.
Plan G	Highly popular; covers everything Plan F does except the Medicare Part B deductible. Available to new enrollees.
Plan N	Lower premium; covers many costs with modest copayments for some office and emergency room visits and a small annual deductible. Part B excess charges not covered.
Plan K & Plan L	Offer cost-sharing features with annual out-of-pocket limits; cover a percentage of benefits with lower premiums.

Because Medigap plan benefits are standardized, choosing the right option is largely a matter of preferred coverage level and monthly cost. Plan G and Plan N have emerged as the most popular options among new Hawaii Medicare beneficiaries. However, given Hawaii’s unique healthcare market and lower number of participating insurers, certain letter plans may not be offered by all companies every year. It’s wise to confirm current plan availability directly with insurers, through the Medicare.gov tool, or by speaking with a Hawaii State Health Insurance Assistance Program (SHIP) representative.

Explore more detailed explanations about how Medicare works with private insurance on our guide: How Does Medicare Work With Private Insurance?.

Medigap Costs and Premium Ranges in Hawaii

The cost of Medicare Supplement plans in Hawaii can vary widely based on the plan type, your age at enrollment, gender, tobacco use, and pricing method (community-rated, issue-age, or attained-age). Most insurers also use different pricing structures:

• Community-rated: Everyone pays the same premium regardless of age.
• Issue-age-rated: Premiums are based on your age when you buy the policy and do not increase as you age.
• Attained-age-rated: Premiums start lower but rise as you get older.

In Hawaii, reported monthly premiums for Medigap range from around $30-$40 for the most basic coverage (like Plan A) up to $300 or more for broad coverage (like Plan F or G). However, due to Hawaii’s smaller insurance market and geographic differences, actual rates may be higher or lower in certain areas. In addition to Medigap premiums, you will also pay the standard Medicare Part B premium, which averages $174.70 per month for 2024 and is subject to annual increases (the deductible for Part B will rise to $283 in 2026).

Medigap’s predictable monthly premiums and near-elimination of surprise costs make it appealing for those who want budget certainty. In contrast, Medicare Advantage plans in Hawaii often offer lower or no premiums (averaging $14/month in 2026) but require copays, coinsurance, and come with annual out-of-pocket limits as high as $9,250 (in-network in 2026). Medigap plans do not have these limits, but the predictable cost makes them preferable for those with complex health needs.

As premium rates and plan offerings may shift year over year, check current Hawaii Medigap costs by contacting local insurance agents, the Hawaii SHIP, or by using official resources like Medicare.gov. If you have lost your Medicare card and need help accessing benefits, learn what to do on our Lost Medicare Card: What to Do Next page.

Eligibility and Enrollment Periods for Medicare Supplement

The eligibility requirements for enrolling in a Medigap Hawaii plan are straightforward: you must be enrolled in both Medicare Part A and Part B, and typically be aged 65 or older. Some individuals under 65 may qualify if they are on Medicare due to a disability; see What Disabilities Qualify for Medicare in 2026? for details.

Open Enrollment Period

Your Medigap Open Enrollment Period provides your best opportunity to enroll. This six-month window begins the first month you are both 65 or older and enrolled in Medicare Part B. During this period, you are granted “guaranteed issue rights”-meaning insurance providers cannot deny you coverage or charge higher premiums due to pre-existing conditions or health history. This is a one-time opportunity for most individuals.

Outside the open enrollment period, you can still apply for Medigap but may have to undergo medical underwriting. Insurers could refuse coverage or charge a higher premium based on your health status, unless you qualify for a special enrollment situation (for instance, losing employer-sponsored coverage or moving out of your Medicare Advantage plan’s service area).

It’s important to note that Medigap does not offer annual open enrollment periods like Medicare Advantage plans do. Changing Medigap policies can be difficult later, unless you have guaranteed issue rights due to specific circumstances.

For questions about eligibility or enrollment, see our contact guide: Who Do I Call for Medicare Questions?.

Differences Between Medigap and Medicare Advantage

Deciding between Medigap Hawaii and Medicare Advantage is a major decision for beneficiaries, impacting cost, flexibility, and coverage. Let’s examine the differences in a Hawaii context:

Feature	Medigap	Medicare Advantage
Coverage	Supplements Original Medicare by covering deductibles, coinsurance, and copays. Does not include drug, dental, or vision coverage.	Combines Parts A & B, usually including drug (Part D), dental, vision, hearing, and fitness. May include extra benefits.
Provider Network	Access to any Medicare-accepting provider nationwide, ideal for travel or snowbirds.	Often limited to local/in-network doctors and hospitals, with higher costs for out-of-network care. Referrals and prior authorization may be required.
Costs	Higher monthly premiums ($30 to $300+); very low out-of-pocket costs once premium is paid. No annual limit on out-of-pocket (Medicare rules).	Low/no premiums with possible copays/coinsurance; out-of-pocket costs capped annually ($9,250 in 2026 in-network).
Enrollment & Switching	One-time 6-month Open Enrollment at age 65/Part B. Difficult to change later without medical underwriting.	Annual open enrollment period plus special enrollment opportunities; easier to switch plans yearly.
Best for	Those who want nationwide access, travel frequently, have higher health usage, or want cost predictability.	Those seeking the lowest premium, network-based care, or extra benefits not in Original Medicare.

Medigap Hawaii offers the security of guaranteed renewability as long as you pay your premium. On the other hand, Medicare Advantage plans can change benefits, provider networks, and costs every year. Hawaii residents should carefully weigh the pros and cons, factoring in their personal health needs, travel preferences, and expected care usage. If you need advice on switching between Medicare coverage types, our guide on how to cancel Medicare coverage may be helpful.

FAQs about Medicare Supplement Plans in Hawaii

• Are Medigap plans available in Hawaii? Yes. Standardized Medigap plans are offered by private insurers approved in Hawaii. Plan availability may be affected by the state’s smaller insurance market, so always verify options with local agents or Medicare.gov.
• Does Medigap cover prescriptions? No. Prescription drugs are not covered; you’ll need a stand-alone Part D plan for medications.
• Can I switch from Medicare Advantage to Medigap in Hawaii? Yes, you can switch, but outside your initial “trial right” (the first 12 months), you may have to pass medical underwriting and could be denied coverage due to pre-existing conditions.
• Are Hawaii’s Medigap costs and enrollment rules different? No. Hawaii follows federal Medigap guidelines in terms of eligibility, plan standardization, and underwriting. However, costs and available insurers may be affected by Hawaii’s smaller marketplace.
• Does Medigap offer travel coverage? Some plans, including Plan G and Plan N, offer limited foreign travel emergency coverage. This benefit is a common reason Hawaii residents choose Medigap over Medicare Advantage, which rarely covers care outside its local network or the U.S.
• What if I lose my Medicare card? For step-by-step help, see our detailed guide: Lost Medicare Card: What to Do Next.
• Where can I get more information or personalized help? Hawaii Medicare beneficiaries can contact the State Health Insurance Assistance Program (SHIP), Medicare.gov, or local insurance agents. See also our Medicare Questions Contact Guide.

For those wondering specifically about disability-based eligibility, review the 2026 disability Medicare eligibility guide for more insight into applying before age 65 in Hawaii.