Medicaid vs Medicare: Key Differences Explained

They sound alike, they are both government health programs, and they were signed into law on the same day in 1965 – so it is no surprise that people confuse them constantly. But Medicaid vs Medicare is not a minor distinction. These are fundamentally different programs that serve different populations, are funded differently, and provide different levels of coverage. Medicare is primarily for Americans 65 and older (plus certain younger people with disabilities), while Medicaid serves low-income individuals and families regardless of age. Some people qualify for both simultaneously. Understanding which program applies to you – or to a family member – affects everything from which doctors you can see to how much you pay out of pocket. Here is a clear, side-by-side comparison to help you sort it out. For a broader overview of health insurance policy, see our healthcare policy guide.

What Is Medicare?

Medicare is a federal health insurance program administered by the Centers for Medicare & Medicaid Services (CMS). It primarily covers Americans aged 65 and older, though younger adults with certain disabilities or end-stage renal disease (ESRD) also qualify. Medicare covers well over 65 million people, and enrollment continues to grow as the population ages.

Medicare has four parts. Part A (Hospital Insurance) covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health services. Most people pay no premium for Part A if they or a spouse paid Medicare taxes for at least 10 years. Part B (Medical Insurance) covers outpatient care, doctor visits, preventive services, durable medical equipment, and some home health services. The standard Part B premium is about $202.90 per month in 2026, with higher-income beneficiaries paying more through income-related monthly adjustment amounts (IRMAA), according to Medicare.gov.

Part C (Medicare Advantage) is an alternative to Original Medicare offered by private insurers. These plans bundle Parts A and B, usually include Part D drug coverage, and may offer extra benefits like dental, vision, and hearing. Part D (Prescription Drug Coverage) covers outpatient prescription medications through private plans; premiums vary by plan. A notable recent change: under the Inflation Reduction Act, Medicare Part D now includes an annual out-of-pocket cap on covered prescription drugs (set at $2,000 for 2025 and indexed to rise modestly thereafter – verify the current-year figure), a meaningful protection for people with high drug costs. Medicare is funded primarily through payroll taxes (Part A), beneficiary premiums, and general federal revenue.

What Is Medicaid?

Medicaid is a joint federal-state program that provides health coverage to low-income individuals and families. Unlike Medicare, Medicaid is means-tested – eligibility depends primarily on income, household size, and in some cases assets. Each state runs its own Medicaid program within federal guidelines, which means coverage, eligibility thresholds, and provider availability vary significantly by state.

In states that expanded Medicaid under the ACA, adults with incomes up to 138% of the federal poverty level qualify for coverage – roughly $22,000 for a single person based on the 2026 federal poverty guidelines (this figure updates annually, so confirm the current threshold for your household size). Most states plus DC have adopted Medicaid expansion, while a minority have not, according to KFF. In non-expansion states, Medicaid eligibility for adults is far more restrictive – often limited to pregnant women, parents with very low incomes, and people with disabilities.

Medicaid covers children (including through the related Children’s Health Insurance Program, or CHIP) at higher income levels than adults. Pregnant women, elderly adults in nursing homes, and individuals with disabilities make up a large share of Medicaid spending even though they represent a smaller share of total enrollees. Medicaid is funded jointly by the federal government (which covers roughly 50% to 77% of costs depending on state income levels, with a higher federal match for the expansion population) and state governments.

Major 2025-2026 Changes to Medicaid (OBBBA)

The most important recent development in this space is federal legislation enacted in 2025, commonly called the One Big Beautiful Bill Act (OBBBA), which makes significant changes to Medicaid. Because implementation is being phased in and administered state by state, the details below are broad strokes – check your state’s Medicaid agency for the rules and dates that apply to you.

• Work / community-engagement requirements. The law directs states to require many able-bodied adults in the Medicaid expansion group to document a set number of hours per month of work, job training, education, or community service to keep coverage, with various exemptions (for example, for caregivers of young children, people with disabilities, and certain others). States are working toward implementation on a federally set timeline, and some may seek additional time – so whether and when this affects you depends on your state.
• More frequent eligibility checks. The law calls for more frequent redeterminations (for example, checking eligibility for expansion adults more than once a year), which means enrollees may need to submit paperwork more often to avoid losing coverage.
• Other funding and eligibility adjustments. OBBBA also changes aspects of Medicaid financing and eligibility verification. Analysts expect these changes to affect enrollment over time.

The practical takeaway: if you or a family member relies on Medicaid, watch for notices from your state, keep your contact information current, and respond promptly to any requests to verify income, hours, or eligibility. Rules are in flux, and the safest move is to confirm current requirements directly with your state.

Side-by-Side Comparison

Eligibility

Medicare eligibility is based primarily on age (65+) or disability status. You generally qualify by having paid Medicare taxes during your working years – most Americans become eligible at 65. Younger people qualify if they have received Social Security Disability Insurance (SSDI) for 24 months, have ESRD, or have amyotrophic lateral sclerosis (ALS). Income does not affect Medicare eligibility, though it affects premiums.

Medicaid eligibility is based on income and household size. In expansion states, adults earning up to 138% of the federal poverty level qualify. In non-expansion states, eligibility categories are narrower. Children qualify at higher income levels through Medicaid/CHIP. Assets may also factor into eligibility for certain Medicaid programs, particularly long-term care coverage. As noted above, new work-requirement and redetermination rules under OBBBA may add steps to staying enrolled.

Cost to Beneficiaries

Medicare beneficiaries pay Part B premiums (about $202.90/month standard in 2026), Part D premiums (varies by plan), deductibles (about $283 for Part B and about $1,736 for a Part A inpatient benefit period in 2026, per Medicare.gov – verify current figures), and coinsurance (commonly 20% for many Part B services). Medicare Advantage plans have their own cost-sharing structures and an annual out-of-pocket maximum. Original Medicare by itself has no out-of-pocket maximum – one of its most significant gaps – which is why many people add a Medigap supplemental plan or choose Medicare Advantage for catastrophic protection.

Medicaid has minimal cost-sharing. Most beneficiaries pay no premiums and face only nominal copays (often just a few dollars) where states charge them at all. Federal rules limit cost-sharing for lower-income beneficiaries, and copays generally cannot be charged for emergency services, family planning, or children’s services. For practical purposes, Medicaid is the closest thing to free comprehensive coverage in the U.S. system.

Coverage Scope

Medicare covers hospital care, physician services, preventive care, prescription drugs (with Part D), durable medical equipment, lab tests, and mental health services. Notable gaps include routine dental, vision, and hearing care – which Original Medicare does not cover, though many Medicare Advantage plans do. Long-term custodial nursing home care is also not covered by Medicare; it covers only short-term skilled nursing stays (up to 100 days) following a qualifying hospital stay.

Medicaid provides comprehensive coverage that often exceeds Medicare’s scope. Federal rules require coverage of inpatient and outpatient hospital care, physician services, lab tests, nursing facility services, home health services, family planning, and Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) services for children. Many states add dental, vision, personal care, and long-term services. Crucially, Medicaid is the primary payer for long-term nursing home care in the U.S., covering a large share of the nation’s long-term care costs, according to MACPAC.

Provider Networks

Medicare is accepted by the vast majority of physicians; the large majority of non-pediatric physicians accept Medicare, according to CMS. You can see any Medicare-participating provider without a referral under Original Medicare. Medicare Advantage plans, however, use provider networks – typically HMO or PPO structures – that may limit your choices.

Medicaid provider acceptance rates are lower. Low reimbursement rates lead some physicians to limit the number of Medicaid patients they see or to not accept Medicaid at all. A MACPAC analysis found that acceptance of new Medicaid patients is meaningfully lower than for private insurance. Finding specialists can be more challenging with Medicaid, particularly in rural areas. Managed-care Medicaid plans, which now cover most Medicaid beneficiaries, use defined provider networks.

Dual Eligibility: When You Qualify for Both

Approximately 12 million Americans are “dual eligibles” – they qualify for both Medicare and Medicaid simultaneously. This typically includes adults 65 and older with low incomes, younger adults with disabilities who also have low incomes, and people with ESRD who meet Medicaid income requirements.

For dual eligibles, Medicare serves as the primary payer for most medical services. Medicaid acts as secondary coverage, picking up costs that Medicare does not – including Medicare premiums, deductibles, and copays, and services Medicare does not cover (like long-term care, and, depending on the state, dental and vision). This combination provides the most comprehensive coverage available in the U.S. healthcare system.

Dual-eligible Special Needs Plans (D-SNPs) are a type of Medicare Advantage plan designed specifically for people with both Medicare and Medicaid. These plans coordinate benefits between the two programs, simplifying what can otherwise be a confusing administrative process. If you or a family member is dual eligible, a D-SNP may streamline care and reduce paperwork. You can learn more about how Medicare covers virtual care in our guide on Medicare and telehealth.

Enrollment Differences

Medicare enrollment follows defined periods. The Initial Enrollment Period is a seven-month window around your 65th birthday (three months before, the birthday month, and three months after). The General Enrollment Period runs January 1 through March 31 each year for people who missed their initial window. The Annual Enrollment Period (October 15 through December 7) allows you to switch between Original Medicare and Medicare Advantage or change Part D plans. Late enrollment in Part B or Part D can result in permanent penalty surcharges on your premiums.

Medicaid enrollment is available year-round – there is no open enrollment period. You can apply whenever you believe you qualify. Applications are processed through your state’s Medicaid agency, online, by phone, or in person. Processing times vary but often take about 30 to 45 days. Coverage can be retroactive in some circumstances, and if you are denied, you have the right to appeal. Keep in mind that under the newer OBBBA rules you may need to verify eligibility (and, for some adults, work or community-engagement hours) more often to stay enrolled.

How to Apply for Medicare and Medicaid

For Medicare, you can apply online at SSA.gov, by calling the Social Security Administration at 1-800-772-1213, or by visiting a local Social Security office. If you are already receiving Social Security benefits, you are automatically enrolled in Medicare Part A at 65. You will need to actively enroll in Part B, Part D, and any supplemental or Advantage plans. The State Health Insurance Assistance Program (SHIP) provides free, unbiased counseling to help you choose Medicare plans.

For Medicaid, apply through your state’s Medicaid agency or through HealthCare.gov (which will route you to your state’s program). You will need proof of income, residency, citizenship or immigration status, and household size. If you are applying for a child, CHIP applications are processed alongside Medicaid. Navigators and community health centers can help with the application at no charge.

Frequently Asked Questions

Can you have both Medicare and Medicaid?

Yes. About 12 million Americans are “dual eligible” and receive both. Medicare is the primary payer for medical services, while Medicaid helps cover premiums, deductibles, copays, and services Medicare does not cover. Dual-eligible individuals receive some of the most comprehensive coverage in the U.S. healthcare system.

Does Medicare cover nursing home care?

Medicare covers short-term skilled nursing facility care (up to 100 days) after a qualifying hospital stay. It does not cover long-term custodial nursing home care. Medicaid is the primary payer for long-term nursing home care, but eligibility requires meeting income and asset limits. Many families engage in Medicaid planning to qualify for long-term care coverage.

Is Medicaid only for people who do not work?

No. Many Medicaid recipients are working adults whose jobs do not offer affordable health insurance and whose incomes fall below the eligibility threshold. In expansion states, adults earning up to 138% of the federal poverty level (roughly $22,000 for a single person under 2026 guidelines) qualify. Retail, food-service, and gig-economy workers are common Medicaid beneficiaries. Note that new OBBBA work-requirement rules ask many expansion adults to document work or community-engagement hours to keep coverage – check your state.

At what age does Medicare start?

Medicare eligibility begins at age 65 for most Americans. You can enroll during the seven-month Initial Enrollment Period around your 65th birthday. Younger people can qualify through SSDI (after a 24-month waiting period), ESRD, or an ALS diagnosis. There is no upper age limit for Medicare eligibility.

Does Medicaid cover dental and vision?

It depends on the state. Federal rules require Medicaid to cover dental and vision for children through EPSDT. For adults, dental and vision coverage is optional, and offerings vary widely by state – some provide comprehensive adult dental, others cover only emergency dental, and a few provide no adult dental coverage. Check your state’s Medicaid program for specifics.

Are the 2026 Medicare costs final?

The figures cited here (about $202.90/month for standard Part B, a $283 Part B deductible, and a $1,736 Part A hospital deductible for 2026) come from Medicare.gov. Medicare costs are updated annually, and your own costs can differ based on income (IRMAA), the plans you choose, and whether you have supplemental coverage. Always verify the current-year numbers on Medicare.gov.

The Bottom Line

Medicaid and Medicare serve different populations through different mechanisms, but both play essential roles in the American healthcare system. Medicare provides coverage based primarily on age and disability status, funded by payroll taxes and premiums. Medicaid provides coverage based on income, funded jointly by federal and state governments – and, as of the 2025 OBBBA law, subject to new work-requirement and eligibility-check rules that are still rolling out. If you are approaching 65, enroll in Medicare during your Initial Enrollment Period to avoid late penalties. If your income is low, apply for Medicaid at any time through your state’s program and stay on top of any verification notices. And if you qualify for both, coordinate your benefits – the combination provides the most comprehensive protection available. Understanding which program you qualify for, and keeping up with changing rules, is one of the most impactful financial decisions you can make.

This article is for general educational purposes only and is not legal, tax, or benefits advice. Program rules, dollar figures, and eligibility criteria change and vary by state; verify current details with Medicare.gov, your state Medicaid agency, or a qualified benefits counselor before making decisions.

Sources

• Medicare.gov – Medicare Costs (2026 premiums and deductibles): medicare.gov
• Centers for Medicare & Medicaid Services (CMS): cms.gov
• KFF – Status of State Medicaid Expansion Decisions: kff.org
• MACPAC – Medicaid and long-term care; physician acceptance of new Medicaid patients: macpac.gov
• Social Security Administration – apply for Medicare: ssa.gov