InsuranceMedicaidMedicare

How do Medicare and Medicaid Work Together?

By August 24, 2026No Comments

By Marc Gilman

(800) 927-9326 |

Key Takeaways

  • Someone who qualifies for both Medicare and Medicaid is called “dual eligible” — more than 13.6 million Americans currently are. Medicare pays first as the primary coverage, and Medicaid pays second, covering costs Medicare leaves behind.

  • Dual eligibility splits into two tiers: “full” (the complete Medicaid benefit package, including long-term care — about 73% of duals) and “partial” (help with Medicare costs only, through a Medicare Savings Program — about 27% of duals). Which tier applies changes what’s actually covered.

  • The main tool built specifically to coordinate Medicare Advantage and Medicaid benefits in one plan is the Dual Eligible Special Needs Plan (D-SNP) — a type of Medicare Advantage plan designed for people who have both.

  • Even people who don’t qualify for full Medicaid may get help through Medicare Savings Programs (MSPs) — there are four categories (QMB, SLMB, QI, and QDWI), each with specific 2026 income and asset limits that determine what gets covered.

  • New Hampshire doesn’t currently have D-SNPs available, which makes it an exception to how this coordination typically works — dual-eligible Granite Staters here rely on a different structure.

What Does “Dual Eligible” Actually Mean?

Dual eligibility happens when someone meets Medicare’s age or disability requirements while also meeting Medicaid’s income and asset limits. It’s not unusual — more than 13.6 million Americans are enrolled in both programs at once, according to the most recent data from the Medicare Payment Advisory Commission and the Medicaid and CHIP Payment and Access Commission.

For dual-eligible individuals, Medicare is always the primary payer. It processes claims first, under its normal coverage rules. Medicaid pays second, picking up costs Medicare leaves behind — coinsurance, copayments, deductibles, and in many cases, services Medicare doesn’t fully cover at all. This layered structure is what protects dual-eligible individuals from the kind of large out-of-pocket medical bills that can hit people on Medicare alone.

One practical note: Medicare and Medicaid are separate applications. Qualifying for one doesn’t automatically enroll you in the other, so both need to be applied for individually. And if you’re on a state’s Medicaid expansion program before turning 65, you may need to reapply for traditional Medicaid once you become Medicare-eligible, rather than assuming your coverage carries over automatically.

Full Dual Eligibility vs. Partial Dual Eligibility

Dual eligibility isn’t one single thing — it splits into two categories, and which one applies changes what you actually get:

  • Full dual eligibility means qualifying for Medicare plus the complete range of Medicaid benefits in your state, generally with little or no out-of-pocket cost. This includes coverage most people don’t think of as “Medicaid basics” — long-term nursing home care, home care, and often dental, vision, and hearing services. Roughly three-quarters of dual-eligible individuals fall into this category.

  • Partial dual eligibility means qualifying for help with Medicare costs through a Medicare Savings Program, without the full Medicaid benefit package — no long-term care coverage, no extra services. This is the remaining roughly one-quarter of dual-eligible individuals, and it’s the category the four MSP types below (QMB, SLMB, QI, QDWI) fall under.

This distinction matters because it’s easy to assume “dual eligible” means the same level of coverage for everyone — it doesn’t, and knowing which category applies changes what to expect and plan around.

Where Do the Two Programs Actually Overlap?

Medicare and Medicaid complement each other rather than duplicating coverage:

  • Hospital and medical care. Medicare covers hospital stays, physician visits, outpatient care, and preventive services. Medicaid, depending on state rules, can pick up the cost-sharing Medicare leaves behind.

  • Prescription drugs. Medicare Part D handles drug coverage — Medicaid doesn’t replace it for dual-eligible individuals, but it can help with premiums and reduce copays.

  • Long-term care. This is where the two programs diverge the most. Medicare generally only covers short-term skilled nursing care following a hospital stay. Medicaid, for those who qualify, can cover long-term nursing home care or home-based support services — a distinction worth understanding well before a long-term care need arises.

  • Extra benefits. Some state Medicaid programs cover services Medicare doesn’t typically include, such as dental, vision, hearing, transportation, or personal care — availability varies significantly by state.

What Is a D-SNP, and How Does It Fit In?

For dual-eligible individuals who want their Medicare Advantage and Medicaid benefits coordinated through a single plan rather than managed separately, Dual Eligible Special Needs Plans (D-SNPs) are the mechanism built for that. A D-SNP is a type of Medicare Advantage plan designed specifically around dual-eligible members, often bundling care coordination, integrated drug coverage, and simplified billing into one plan. D-SNPs aren’t all the same, though — most are “coordination-only,” meaning Medicaid benefits are still delivered separately by the state or a Medicaid managed care plan, while more integrated versions (called HIDE-SNPs and FIDE-SNPs) combine Medicare and Medicaid services more tightly under one organization. Enrollment is optional, but for people managing both programs, having a single point of coordination can meaningfully cut down on administrative confusion.

There’s also a separate, more intensive integration option worth knowing about for older adults with significant care needs: the Program of All-Inclusive Care for the Elderly (PACE). PACE combines Medicare and Medicaid benefits into one program built around keeping frail seniors living in the community rather than in a nursing facility, providing medical care, therapies, and social support through a single coordinated team. New Hampshire does not currently have a PACE program — it’s one of a small number of states without one — though there’s active industry interest in exploring whether one could be developed here. It’s worth knowing PACE exists as a model even though it isn’t an option in NH today.

One product worth flagging by contrast: Medigap generally isn’t sold to people who already have Medicaid, and for good reason — full Medicaid coverage already picks up most of the cost-sharing a Medigap policy is designed to cover, so it adds little value on top of what Medicaid already provides. If you’re dual eligible, a D-SNP or your existing Medicaid coverage is generally the more relevant option to explore rather than a Medigap policy.

What If Someone Doesn’t Qualify for Full Medicaid? (Partial Dual Eligibility)

This is where the “partial dual eligibility” category from earlier comes in. Partial assistance is available through Medicare Savings Programs (MSPs), which are income-based and administered through Medicaid but don’t require full Medicaid eligibility. There are four MSP categories, each with its own 2026 income and asset limits (these are the federal floors; some states set higher limits):

  • Qualified Medicare Beneficiary (QMB) — covers Part A and Part B cost-sharing entirely. 2026 limits: monthly income up to $1,350 (individual) or $1,824 (married couple); assets up to $9,950 (individual) or $14,910 (couple). Providers are prohibited from billing QMB enrollees for Medicare deductibles, coinsurance, or copays at all — CMS actively works to stop this kind of improper billing when it happens.

  • Specified Low-Income Medicare Beneficiary (SLMB) — helps pay the Part B premium only. 2026 limits: monthly income between $1,350 and $1,616 (individual) or $1,824–$2,184 (couple), with the same asset limits as QMB.

  • Qualifying Individual (QI) — also helps with the Part B premium, for incomes slightly above SLMB. 2026 limits: monthly income between $1,616 and $1,816 (individual) or $2,184–$2,455 (couple), same asset limits. QI coverage depends on annual federal funding allotments to each state, so it’s not unlimited.

  • Qualified Disabled and Working Individual (QDWI) — a narrower category for people who lost premium-free Part A after returning to work following a period on Social Security Disability Insurance. It covers the Part A premium only. 2026 limits: monthly income up to $5,405 (individual) or $7,299 (couple); assets up to $4,000 (individual) or $6,000 (couple).

These are federal floors — actual eligibility and exact dollar cutoffs should be confirmed with your state, since income disregards and state-specific rules can shift the real-world threshold. One more thing worth knowing: if you qualify for QMB, SLMB, or QI, you’re generally enrolled automatically in Extra Help, the program that substantially lowers Part D prescription drug costs — you typically don’t need to apply for it separately.

If you’re ever billed for something a QMB determination should have covered, you have the right to a refund — bring both your Medicare card and your Medicaid/QMB card to appointments, and if a provider bills you anyway, ask for a corrected bill.

What Does This Look Like in New Hampshire?

Here’s the detail that matters most for Granite State residents: New Hampshire doesn’t currently have D-SNPs available, and it also doesn’t have a PACE program. That makes the state an exception on two fronts to how Medicare-Medicaid coordination typically works elsewhere — dual-eligible individuals here don’t have either the single-plan D-SNP option or the PACE model that residents of most other states can choose from.

This isn’t a new pattern. A KFF analysis of national enrollment data found New Hampshire was one of just 11 states where 70% or more of dual-eligible individuals received their Medicare coverage through traditional Medicare rather than Medicare Advantage — a direct reflection of how limited the state’s dual-eligible plan options have long been.

Instead, New Hampshire’s Medicare Advantage market relies more heavily on Chronic Condition Special Needs Plans (C-SNPs), which are built around managing specific chronic conditions rather than coordinating dual Medicare-Medicaid eligibility. For dual-eligible Granite Staters, this generally means Medicare and Medicaid benefits are still coordinated — through the standard primary/secondary payment structure and Medicaid’s own benefits — just without the single integrated D-SNP plan structure available in many other states.

Where Does Insurance Planning Fit In?

If you’re dual eligible or think you might qualify for a Medicare Savings Program, understanding exactly how your specific coverage coordinates matters more than the general rules — especially in New Hampshire, where the absence of D-SNPs means the usual “just enroll in a D-SNP” answer doesn’t apply. Working through your actual options with someone who knows the New Hampshire market specifically is worth more here than following general national guidance.

What To Do Next

If you think you might be dual eligible, or you’re not sure whether a Medicare Savings Program could help with your costs, Gilman Agency can walk you through what coordination actually looks like for your situation in New Hampshire.

Call us at (800) 927-9326 or email to schedule a review.


Sources: Centers for Medicare & Medicaid Services, “Dual Eligibility Categories” (revised February 2026); Centers for Medicare & Medicaid Services, “Aligning Medicare and Medicaid”; Medicaid.gov, “Integrating Care”; KFF, “How Do Dual-Eligible Individuals Get Their Medicare Coverage?” (2023, based on 2020 CMS enrollment data); Medicare Payment Advisory Commission and Medicaid and CHIP Payment and Access Commission, “Data Book: Beneficiaries Dually Eligible for Medicare and Medicaid” (December 2025); National Council on Aging, “What Does It Mean to Be Dual-Eligible for Medicare and Medicaid?” and “What Is Full Dual Eligibility vs. Partial Dual Eligibility?” (June 2026); Celeste McGrath, “How does Medicare and Medicaid Work Together?” Medicare Agents Hub (February 2026); Olivia Penn, “Understanding Dual Eligibility: Medicare + Medicaid, Savings Programs, and Your Rights,” Medicare Tools (January 2026); Medicare.gov, Special Needs Plans overview; National PACE Association, “PACE in the States” (April 2026).