Medicare versus Medicaid: what each program covers and who qualifies

The second group is adults under 65 who have received Social Security Disability Insurance (SSDI) benefits for 24 months. Medicare begins after that 24-month waiting period, with two exceptions: people with amyotrophic lateral sclerosis (ALS) qualify immediately, and people with end-stage renal disease (ESRD) follow separate timing rules.

The third group is people of any age with ESRD or ALS who meet specific criteria.

Citizenship or lawful residency is required, but there is no income or asset test to enroll in Medicare itself. That distinguishes it sharply from Medicaid.

In short: if you are 65 or have had SSDI for two years, Medicare is likely available to you regardless of income.

Medicare is divided into parts, each covering a different category of care.

Part A covers inpatient hospital stays, skilled nursing facility (SNF) care, hospice, and some home health. In 2026, the Part A inpatient deductible is $1,736 per benefit period, not per year. A benefit period begins when you are admitted and ends when you have been out of the hospital or SNF for 60 consecutive days, meaning two hospitalizations in one year can each trigger the full deductible. For hospital stays beyond 60 days, you pay $434 per day for days 61 to 90 of a benefit period in 2026. Beyond 90 days, you draw on 60 lifetime reserve days at $868 per day in 2026.

SNF coverage requires a formal 3-day inpatient hospital admission. Observation status, which is billed under Part B, does not count toward that 3-day requirement. Once in an SNF, days 1 to 20 are fully covered; days 21 to 100 cost $217 per day in 2026; after day 100, the beneficiary pays all costs.

Part B covers outpatient care, physician services, preventive visits, durable medical equipment, and most lab work. In 2026, the standard Part B premium is $202.90 per month, and the annual deductible is $283. After the deductible, Medicare pays 80% of the approved amount and you pay 20%, with no annual cap on that 20% under Original Medicare alone. Non-participating providers may charge up to 15% above the Medicare-approved amount, and some states ban those excess charges.

Higher earners pay more through Income-Related Monthly Adjustment Amounts (IRMAA). In 2026, IRMAA begins above $109,000 in modified adjusted gross income (MAGI) for single filers and $218,000 for joint filers, using a two-year lookback (2026 premiums are based on 2024 MAGI). IRMAA applies to both Part B and Part D.

Part D covers prescription drugs through private plans. In 2026, no Part D plan may set a deductible above $615, and out-of-pocket spending on covered drugs is capped at $2,100 for the year. Once you hit that cap, covered drugs cost $0 for the rest of the plan year.

Medicare Advantage (Part C) bundles Parts A, B, and usually D through a private insurer. In 2026, the federal in-network maximum out-of-pocket (MOOP) cap is $9,250; the combined in-network and out-of-network cap is $13,900. According to KFF, the 2026 enrollment-weighted average in-network MOOP is $5,421, meaning many plans set limits well below the federal ceiling.

In short: Medicare has real out-of-pocket exposure, particularly for hospitalizations and the uncapped 20% coinsurance under Part B, which is why supplemental coverage matters.

Medicaid eligibility is built around income and, for certain groups, assets. The Affordable Care Act expanded Medicaid to cover most adults with incomes up to 138% of the federal poverty level in states that adopted expansion. In states that did not expand, eligibility rules are narrower and depend on categorical factors such as pregnancy, disability, or being a parent of dependent children.

There is no single national Medicaid income or asset limit. Each state sets rules within federal minimum standards, and those rules are updated annually. The practical answer is to apply and let the state agency run the determination.

Medicaid also covers long-term services and supports (LTSS), including nursing home care and home- and community-based waiver services, in a way Medicare does not. For nursing home care in particular, Medicaid is the primary payer for the majority of residents after Medicare's 100-day SNF benefit ends.

In short: Medicaid is the income-based safety net that fills gaps Medicare was never designed to fill, especially for long-term care.

One distinction people frequently misunderstand: Medicare is not means-tested. You can have significant retirement savings and still qualify. Medicaid is means-tested, and excess assets may require a spend-down process before eligibility is granted, although rules differ by state and by the category of coverage being sought.

In short: the programs are complementary, not competitive, and the rules governing each reflect very different policy goals.

People enrolled in both Medicare and Medicaid are called dual-eligible beneficiaries. About 12 million Americans carry both cards. Dual eligibility typically means Medicaid pays most or all of the costs Medicare would otherwise leave to the beneficiary, including premiums, deductibles, and coinsurance.

The level of Medicaid assistance for Medicare costs depends on which Medicare Savings Program (MSP) you qualify for. MSPs are federal programs administered by states that help pay Part A and Part B costs. The four tiers are the Qualified Medicare Beneficiary (QMB), Specified Low-Income Medicare Beneficiary (SLMB), Qualifying Individual (QI), and Qualified Disabled and Working Individuals (QDWI) programs. Income and asset limits for each tier are indexed annually and vary by state, so contact your state Medicaid agency or apply through medicare.gov to find out where you land.

For Part D costs, the Low Income Subsidy (LIS), also called Extra Help, reduces or eliminates premiums and cost-sharing for covered drugs. Dual-eligible beneficiaries are generally automatically enrolled in Extra Help.

If you are enrolled in Medicare Advantage and are dual-eligible, you may qualify for a Dual Eligible Special Needs Plan (D-SNP), a type of Medicare Advantage plan specifically designed for people with both Medicare and Medicaid. D-SNPs coordinate benefits across both programs and often include care management services. To find out more about coverage through a D-SNP or another plan type, please contact us to discuss plan options.

In short: being dual-eligible is not a burden; it is a benefit structure that can dramatically reduce what you actually pay out of pocket.

Several rules interact across Medicare and Medicaid in ways that create financial risk if ignored.

The Part B late-enrollment penalty adds 10% to your Part B premium for each full 12-month period you went without Part B and were not covered by qualifying active employer coverage. It is permanent. Medicaid enrollment alone does not excuse the penalty, though if you were enrolled in a Medicare Savings Program that paid your Part B premium, the underlying Part B enrollment was maintained.

The Part D late-enrollment penalty adds 1% of the national base beneficiary premium ($38.99 in 2026) for each full month you went 63 or more days without creditable drug coverage. It, too, is permanent. People enrolled in Extra Help are protected from the penalty.

HSA contributions must stop once you enroll in any part of Medicare, including premium-free Part A. Part A can backdate up to 6 months, which can create an unexpected HSA penalty if you contribute during that window.

COBRA and retiree coverage never count as active employer coverage for purposes of the Part B special enrollment period (SEP) or late-penalty calculations. The 8-month Part B SEP begins when your employment or your employer coverage ends, whichever comes first, not when COBRA ends.

Medicaid estate recovery is a program that allows states to seek reimbursement from a deceased Medicaid recipient's estate for long-term care costs paid by Medicaid. Rules on what can be recovered, and from whom, vary by state. This is a consideration for anyone using Medicaid to fund nursing home care.

In short: the penalty and coordination rules have long tails; understanding them before a gap occurs is far less expensive than fixing the damage after.

If you are approaching 65, already on Medicare, or helping a family member navigate either program, three actions move you forward.

First, check your Medicare enrollment status and any open enrollment periods. The Initial Enrollment Period (IEP) is seven months long: the three months before your birthday month, your birthday month, and the three months after. Missing it without qualifying coverage in place starts the penalty clock.

Second, apply for Medicaid or an MSP even if you are not sure you qualify. Applications are free, determinations are made by state agencies, and some programs offer retroactive coverage. The cost of not applying is often much higher than the cost of a declined application.

Third, review your Part D coverage annually during the Annual Enrollment Period (AEP), which runs October 15 to December 7 each year. Formularies and premiums change, and the plan that was right last year may not be the lowest-cost option now.

To find out more about coverage options that coordinate Medicare and Medicaid benefits, please contact us to discuss plan options.

In short: the window to act is usually shorter than people expect; the IEP, AEP, and Medicaid application timelines all reward early attention.