The Short Answer: Yes, But It’s Complicated
You can technically get Medigap if you’re on disability and under 65 — but whether any insurer is actually required to sell it to you depends entirely on what state you live in. That’s the part nobody tells you upfront, and it matters a lot.
Here’s the situation. When you qualify for Medicare because of a disability (usually after 24 months on Social Security Disability Insurance, or SSDI), you get the same Medicare Parts A and B that a 65-year-old gets. The coverage works the same way. The gaps in that coverage are the same gaps. But the federal protections that guarantee your right to buy a Medigap plan? Those kick in at 65, not at disability enrollment.
So the federal government essentially said: we’ll give disabled people Medicare, but we’ll let states decide whether they have to be able to supplement it. Some states stepped up. A lot didn’t.
If you’re sitting there under 65 with Medicare due to disability and you’re trying to figure out your options, this article is going to tell you exactly what your situation looks like and what I’d actually recommend doing.
What Federal Law Does (and Doesn’t) Guarantee
Federal law gives people under 65 with Medicare a one-time open enrollment window when they turn 65. During that window, no insurer can turn you down for any Medigap plan. They can’t charge you more because of a pre-existing condition. That protection is ironclad.
But before you turn 65? Federal law is silent on it. There’s no guaranteed issue right for disabled Medicare beneficiaries under 65 at the federal level. None.
What federal law does require is that states that want insurers to sell Medigap at all must make those insurers offer at least one Medigap plan to disabled Medicare beneficiaries under 65. But that requirement only applies if a state has enacted it, and the specifics vary wildly. Some states require all standardized plans to be available. Others only require one plan. Some let insurers charge dramatically higher premiums to under-65 enrollees. A few states go even further and require guaranteed issue regardless of age.
This is one of those situations where your zip code genuinely determines your financial exposure. I’ve talked to people in California who had solid options and people in states with minimal protections who were basically stuck.
State-by-State: What Your Options Actually Look Like
Rather than list all 50 states (which would be a book), here’s how the landscape generally breaks down:
| State Category | What Insurers Must Offer | Can They Charge More? | Examples |
|---|---|---|---|
| Strong protections | All or most Medigap plans, guaranteed issue | Limited or no surcharge allowed | California, New York, Massachusetts |
| Moderate protections | At least one plan (often Plan A) | Yes, sometimes significantly | Florida, Texas, Ohio |
| Minimal protections | One plan, sometimes with medical underwriting allowed | Yes, often 150% or more of standard rate | Several Southern and Plains states |
| No state requirement | Insurers may decline entirely | Effectively unlimited if they offer at all | Varies; check your state DOI |
Even in states with “moderate protections,” you may find that the only guaranteed plan is Plan A, which is the most bare-bones Medigap option. Plan A covers your Part A hospital coinsurance and some other basics, but it doesn’t cover your Part A deductible ($1,676 per benefit period in 2026) or your Part B deductible ($257 in 2026). So don’t assume having access to Medigap means having access to the plans that actually give you meaningful protection.
My strong advice: call your state’s Department of Insurance directly before assuming anything. The rules change. What was true three years ago may not be true now.
The Big Mistake People Make: Assuming Medicare Advantage Is a Safe Fallback
Here’s where I see people go wrong all the time. They find out Medigap options in their state are limited or expensive, and they think, “Fine, I’ll just go with Medicare Advantage.” I understand the logic. Medicare Advantage plans are available to disabled Medicare beneficiaries under 65, and they often have low or no monthly premiums.
But there’s a real trap here that I want to be direct about.
When you’re on Medicare because of a disability and you’re under 65, your health situation is often more complex than the typical 65-year-old. You may have the chronic condition or disability that qualified you for SSDI in the first place. You may have ongoing specialist care, frequent hospitalizations, or expensive medications. Medicare Advantage plans, for all their low premiums, have significant cost-sharing at the point of care: copays, coinsurance, out-of-pocket maximums that can hit $8,000 to $9,000 or more annually on in-network care alone in 2026.
If you’re a 55-year-old who went on disability after a heart attack and you’re using the healthcare system regularly, a bad year on Medicare Advantage could cost you far more than a Medigap premium would have. The premium feels like the safe number to focus on. The out-of-pocket exposure is where people get hurt.
That’s not a knock on Medicare Advantage for everyone. For a relatively healthy person with limited usage, it can work. But for disabled Medicare beneficiaries who got Medicare precisely because their health needs are significant, I think you need to be very careful before assuming low premium equals low cost.
When You Turn 65: Your Real Open Enrollment Window
Here’s the genuinely good news if you’re under 65 and your current options are limited. When you turn 65 and your Medicare continues (or re-enrolls, depending on your situation), you get a six-month Medigap open enrollment period. During those six months, every insurer selling Medigap in your state must sell you any plan they offer. No medical underwriting. No questions about your disability or health history. No higher rates because of pre-existing conditions.
This is your golden window. Don’t miss it.
In my experience, the biggest mistake people make with this window is not using it because they feel fine with what they have. Then something changes — health, finances, coverage — and they try to buy Medigap at 68 or 70 and suddenly they’re facing underwriting and potential denial. That six-month window at 65 is the best deal you’ll ever get on Medigap.
Plan G is the plan most people should look at seriously when that window opens. At 65, Plan G typically runs $100 to $200 per month depending on your state and the insurer. It covers essentially everything except the 2026 Part B deductible of $257. For someone with ongoing health needs coming off a disability, that kind of predictability can be worth a lot more than the premium savings of a lighter plan.
If you’re under 65 right now and struggling with limited Medigap access, I’d encourage you to think of age 65 as your target date. Make sure you know exactly when your Medicare Part B start date was (since that determines when your open enrollment begins at 65), and be ready to act.
What to Actually Do Right Now If You’re Under 65 on Disability
Let’s make this practical. If you’re under 65, on Medicare because of disability, and trying to figure out your Medigap situation, here’s the sequence I’d follow:
- Check your state’s rules first. Call your state Department of Insurance or visit their website. Ask specifically what Medigap plans insurers are required to offer to Medicare beneficiaries under 65 in your state.
- Get actual quotes. Even in states with limited requirements, some insurers go beyond what’s mandated. You won’t know until you ask. Use a broker who specializes in Medicare — not someone who mostly sells life insurance and does Medicare on the side.
- Run the real numbers on Medicare Advantage. If Medigap isn’t available or is priced out of reach, look at Medicare Advantage plans carefully. Compare the out-of-pocket maximum to what you’d pay in Medigap premiums over a year. Think honestly about how often you use healthcare.
- Find out about your state’s SHIP counselors. Every state has a State Health Insurance Assistance Program (SHIP) with free counselors. They’re not trying to sell you anything, and they know your state’s rules cold.
- Mark your 65th birthday on the calendar now. Seriously. Your Medigap open enrollment window at 65 is six months of guaranteed access. Know exactly when it starts and have a plan ready to move.
Bottom Line
If you’re under 65 and on Medicare due to disability, your ability to get Medigap depends on your state, and in many states your options are limited or expensive. Don’t give up without actually checking, and don’t assume Medicare Advantage is automatically the right fallback if your health needs are significant. Your most important move is protecting your six-month open enrollment window at 65 — that’s when the playing field levels out, and it’s the window where Plan G almost certainly makes sense for most people who’ve been on disability Medicare.
Frequently Asked Questions
Can an insurance company refuse to sell me Medigap because I’m under 65?
In many states, yes. Federal law doesn’t prevent it. Whether an insurer can turn you down or charge you significantly higher rates depends on your state’s specific rules. Some states require guaranteed issue for disabled Medicare beneficiaries. Others don’t. You need to check what your state requires.
Will I have to go through medical underwriting if I apply for Medigap under 65?
Possibly, depending on your state. In states with strong protections, guaranteed issue requirements may apply to under-65 enrollees. In states without those protections, insurers can require underwriting, which means they can reject you or charge more based on your health history. This is exactly why that age-65 open enrollment window matters so much.
What happens to my Medigap when I turn 65?
If you already have Medigap, it generally continues. When you turn 65 and your Medicare status changes from disability-based to age-based, you also get a new six-month open enrollment period. If you’re in a less comprehensive plan, this is the opportunity to switch to something better without underwriting.
Are Medigap premiums higher if you’re under 65 on disability?
Usually, yes, where they’re available at all. In states that allow it, insurers can charge significantly more to under-65 disability enrollees than they charge 65-year-olds. The rationale is that younger disabled people often have higher healthcare utilization. Depending on your state, the premium difference can be substantial — sometimes two or three times the standard age-65 rate.
