Can You Have Medigap and Medicaid Together?

Table of Contents

• Understanding Medigap and Medicaid: Key Differences
• Can You Have Medigap and Medicaid at the Same Time?
• How Medicaid Paying Medicare Premiums Affects Your Medigap Policy
  • What Medicaid Actually Pays
  • The Decision Tree: Keep, Cancel, or Review
  • Before You Cancel, Check These Three Things
  • How to Verify Your State's Rules
  • If You Decide to Keep Medigap
• Medicare Savings Programs and Medigap Coverage
• Medigap Premiums and Medicaid Eligibility: What You Need to Know
• What Happens When Losing Medicaid and Medicare Coverage
• Coordination of Benefits for Dual-Eligible Individuals
  • Who Pays First
  • Worked Examples by Coverage Type
  • What to Check on Your Explanation of Benefits
  • Practical Steps at Every Visit
  • When Coordination Breaks Down
• Frequently Asked Questions

Last Updated: October 14, 2026

Understanding Medigap and Medicaid: Key Differences

Medigap and Medicaid are often confused because both help cover healthcare costs, but they're completely different programs.

Medicare is a federal program for people 65 and older, with four parts: Part A (hospital care), Part B (doctor visits), Part C (Medicare Advantage), and Part D (prescription drugs) (Overview of Medicare).

Medigap (Supplemental Insurance) is a private policy that fills Original Medicare's gaps, deductibles, copayments, and coinsurance.

Medicaid is a joint federal and state program for low-income individuals, based on income and assets rather than age.

The key difference: Medicare is based on age or disability, Medicaid on income.

Can You Have Medigap and Medicaid at the Same Time?

Yes, you can have Medigap and Medicaid together, but it's not always the best choice.

When you have both, Medicaid is your primary payer: Medicaid pays first, then Medigap covers what Medicaid doesn't, and Medicare covers what's left.

The real question isn't whether you CAN have both, it's whether you SHOULD. If you have Medicaid, you likely don't need Medigap:

• Medicaid covers more. Medigap only fills gaps in Original Medicare. Medicaid covers broader services, including long-term care and nursing home care.
• Medicaid is cheaper. Medigap requires monthly premiums. Medicaid is free for eligible individuals.
• Medicaid is primary. If Medicaid pays your Medicare premiums, having Medigap adds an extra premium you may not need.

Many people drop Medigap once Medicaid is approved. Your state Medicaid program can tell you whether keeping it makes sense.

How Medicaid Paying Medicare Premiums Affects Your Medigap Policy

When you qualify for Medicaid, the state may pay some or all of your Medicare premiums through a Medicare Savings Program (MSP), often called "premium assistance." That changes whether Medigap is still worth its monthly premium.

What Medicaid Actually Pays

Premium assistance is tiered. The four Medicare Savings Programs pay different amounts:

• Qualified Medicare Beneficiary (QMB): Pays Part A and Part B premiums, plus Medicare deductibles, coinsurance, and copayments (Qualified Medicare Beneficiary (QMB) Program Group).
• Specified Low-Income Medicare Beneficiary (SLMB): Pays the Part B premium only.
• Qualifying Individual (QI): Pays the Part B premium only, and is granted on a first-come, first-served basis each year.

Full Medicaid (not just an MSP) covers Medicare cost sharing like QMB, plus services Medicare doesn't cover at all, such as long-term services and supports.

The Decision Tree: Keep, Cancel, or Review

There's no single right answer, but the logic is consistent:

1. If you are QMB or on full Medicaid: Medicaid already pays your deductibles, coinsurance, and copayments, so Medigap is largely duplicative. Most people in this group cancel it and redirect the premium.
2. If you are SLMB or QI: Medicaid pays only your Part B premium, so you still owe Medicare cost sharing. Medigap can add real value here by covering the deductibles and coinsurance your MSP tier does not.
3. If you are QDWI: You keep Part A but pay its premium yourself. Medigap may still help with cost sharing, but the Part A premium is the bigger budget item.
4. If you expect Medicaid to end soon: Keeping Medigap can act as a bridge. But confirm your guaranteed-issue window first, see the section on losing coverage below.

Before You Cancel, Check These Three Things

• Your state's Medigap rules. A handful of states (including Connecticut, Massachusetts, Maine, and New York) have year-round guaranteed-issue or continuous open enrollment rules, making it easier to buy Medigap later. Elsewhere, once you drop Medigap outside a protected window, an insurer can medically underwrite you.
• Your trial right. If you joined Medicare Advantage when first eligible and want to switch back to Original Medicare, you may have a 12-month trial right to buy Medigap without underwriting. This is separate from the Medicaid loss-of-coverage right.
• Your Medicaid renewal date. Eligibility is redetermined periodically. If your income is close to the limit, dropping Medigap now could leave you exposed if Medicaid ends before you can reapply.

How to Verify Your State's Rules

Medigap guaranteed-issue rights and Medicaid eligibility rules are set at the state level. To confirm what applies:

• Contact your State Health Insurance Assistance Program (SHIP) for free, unbiased counseling.
• Check your state Medicaid agency's website for the current income and asset limits.
• Ask your Medigap insurer in writing whether your policy can be reinstated without underwriting if Medicaid ends.

If You Decide to Keep Medigap

Some people keep Medigap for peace of mind, especially if they expect Medicaid to end or travel and want predictable cost sharing. If you keep it:

• Continue paying the premium directly to the insurer. Medicaid will not pay it for you.
• Tell your insurer you are now dual eligible. Some carriers adjust billing or plan options.
• Keep your Medigap card alongside your Medicare and Medicaid cards so providers bill in the right order.

A licensed agent or your SHIP counselor can run the numbers for your specific plan, premium, and Medicaid tier.

Medicare Savings Programs and Medigap Coverage

Medicare Savings Programs (MSPs) are state programs for low-income Medicare beneficiaries that help pay Medicare premiums, deductibles, and copayments.

There are four Medicare Savings Programs:

• Qualified Medicare Beneficiary (QMB): Pays Part A and Part B premiums, deductibles, and copayments
• Specified Low-Income Medicare Beneficiary (SLMB): Pays Part B premiums only
• Qualified Individual (QI): Pays Part B premiums when other help isn't available
• Qualified Disabled and Working Individual (QDWI): Helps working people with disabilities keep Part A coverage

MSP income limits are higher than Medicaid's in most states, so you might qualify for an MSP but not Medicaid.

Your state's Medicaid office or local Area Agency on Aging can help determine which program offers the best coverage for you.

Medigap Premiums and Medicaid Eligibility: What You Need to Know

Medigap premiums range from affordable to expensive depending on plan and age, and when you have Medicaid, those premiums factor into your eligibility.

But this benefit is usually small. The financial advantage of having Medicaid typically outweighs the cost of a Medigap premium.

If you're on the edge of Medicaid eligibility, talk to your state Medicaid office. They can run the numbers for your specific situation.

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Another consideration: if you have Medicaid and later lose it, your Medigap policy protects you.

What Happens When Losing Medicaid and Medicare Coverage

Losing Medicaid creates a coverage gap.

If you dropped Medigap when you got Medicaid, you'll need to reapply when Medicaid ends. Here's what happens:

Guaranteed-issue rights: You have the right to buy certain Medigap plans without underwriting if you lose Medicaid. This protection lasts 63 days after Medicaid ends. During this window, insurers cannot deny you or charge more based on health status.

Plans available: You can choose from Medigap plans C, D, G, or M (depending on your state and age).

Premiums: Your premium will be based on your age and location, not your health. This is a huge advantage.

Timeline: Apply for Medigap as soon as you know Medicaid will end. Don't wait.

If you're losing Medicaid due to increased income, you may also be losing other assistance programs. Plan ahead.

Coordination of Benefits for Dual-Eligible Individuals

When you have both Medicare and Medicaid, the programs coordinate so you're not billed twice and each pays its share in the correct order. Understanding this prevents surprise bills and helps you catch errors early.

Who Pays First

For most services, Medicare is the primary payer and Medicaid is the secondary payer. That means:

1. Your provider bills Medicare first.
2. Medicare pays its share and sends an Explanation of Benefits (EOB) or Medicare Summary Notice (MSN).
3. The provider then bills Medicaid for the remaining balance.
4. Medicaid pays what Medicare did not cover, up to Medicaid's payment limits.

There are exceptions. If the service is covered by Medicaid but not by Medicare, for example, certain long-term services and supports, Medicaid is the only payer and there is no Medicare claim to file.

Worked Examples by Coverage Type

Example 1, Full Medicaid or QMB, Medicare-covered service. You see a specialist. The Medicare-approved amount is $200.

Example 2, SLMB or QI, Medicare-covered service. Same $200 visit. Medicare pays $160, leaving $40.

Example 3, Service Medicare does not cover. You need a Medicaid-covered service that Medicare excludes. Medicaid pays for it directly.

Example 4, Prescription drugs. Medicare Part D pays first for covered drugs.

What to Check on Your Explanation of Benefits

After a claim processes, review your Medicare Summary Notice or EOB for:

• The payer order. Medicare should appear as the primary payer. If Medicaid is listed first, the claim was likely billed incorrectly.
• The "you may be billed" column. For a dual-eligible beneficiary on full Medicaid or QMB, this column should generally read $0 for Medicare-covered services.
• The provider's billed amount versus the Medicare-approved amount. You should never be billed for the difference between what a provider charges and what Medicare approves, as long as the provider accepts Medicare assignment.

If you see a balance you believe Medicaid should have covered, call the provider's billing office first and ask them to rebill Medicaid. If that fails, contact your state Medicaid agency.

Practical Steps at Every Visit

• Show both your Medicare card and your Medicaid card at check-in.
• Tell the front desk you are dual eligible and that Medicare should be billed first.
• Confirm the provider accepts both Medicare and your state's Medicaid.
• Keep every EOB, MSN, and Medicaid notice in one folder.

When Coordination Breaks Down

Common problems include a provider billing Medicaid first, a Medicaid claim denied for a missing Medicare EOB, or a Medigap policy that was never cancelled continuing to receive claims. If you get a bill you believe is wrong:

1. Do not pay it immediately.
2. Call the provider's billing office and ask which payer was billed and in what order.
3. If Medicare was not billed first, request that they rebill.
4. If Medicaid denied the claim, ask for the denial reason in writing.
5. Escalate to your state Medicaid agency or your SHIP counselor if the issue is not resolved.

Your state Medicaid program sets the specific coordination rules and payment limits that apply to you, so confirm details with them or with a SHIP counselor before assuming a bill is correct.