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When it comes to the healthcare system in the United States, two government programs stand out as pillars of public coverage: Medicare and Medicaid. Although their names are similar and often confused, they serve different populations, have distinct eligibility rules, and offer complementary coverage. For those immigrating to the US, understanding these programs is an essential part of long-term planning.
Unlike the Brazilian SUS, which offers universal coverage regardless of income or age, the American system is fragmented. Medicare primarily serves seniors over 65, while Medicaid is aimed at low-income families and individuals. Knowing the rules of both programs is fundamental for immigrants planning to build a lasting life in the United States and needing to ensure access to healthcare at all stages.
What Is Medicare?
Medicare is a federal health insurance program administered by the Centers for Medicare & Medicaid Services (CMS). Primarily aimed at people aged 65 and older, the program also covers younger individuals with specific disabilities, End-Stage Renal Disease (ESRD), or Amyotrophic Lateral Sclerosis (ALS).
The program is divided into four parts, each with specific coverage and costs:
Part A (Hospital Insurance) covers hospital stays, care in skilled nursing facilities, hospice care, and some home health services. For those who have paid Medicare taxes for at least 40 quarters-about 10 years of work-Part A does not require a monthly premium.
Part B (Medical Insurance) covers doctor visits, outpatient services, durable medical equipment, and preventive services. In 2026, the standard monthly premium for Part B is $202.90, and the annual deductible is $283. Beneficiaries with higher incomes pay adjusted premiums.
Part C (Medicare Advantage) is an alternative offered by private insurers approved by Medicare. It combines the coverage of Parts A and B and often Part D, as well as additional benefits such as dental, vision, and wellness programs.
Part D (Prescription Drugs) helps with the cost of prescription medications. It can be purchased separately or integrated into Medicare Advantage plans. Costs vary depending on the chosen plan and the medications used.
Eligibility for Immigrants
Eligibility for Medicare is not automatic for all immigrants. The main criteria require the applicant to be a US citizen or legal permanent resident (Green Card holder) and to have lived in the US for at least five consecutive years. In addition, the person must meet the age requirement (65 or older) or have a qualifying medical condition.
To access Part A without a monthly premium, the beneficiary must have paid Medicare taxes for at least 40 quarters over their working life. Immigrants who have not reached this number of contributions can buy Part A by paying a monthly premium, provided they meet the other residency and age criteria.
What Is Medicaid?
Medicaid is a health program jointly funded by the federal and state governments, aimed at low-income individuals and families. Because it is administered at the state level, eligibility rules and coverage scope vary significantly depending on the state of residence.
The main groups served include children and adolescents, pregnant women, adults with disabilities, low-income seniors, and low-income adults in states that have adopted the program’s expansion under the Affordable Care Act (ACA). Coverage may include doctor visits, hospitalizations, medications, mental health services, and long-term care.
Eligibility Criteria
Eligibility is primarily based on family income relative to the Federal Poverty Level (FPL). In 2026, the FPL is $15,650 for one person and $32,150 for a family of four. These amounts are higher in Alaska and Hawaii.
In states that have adopted Medicaid expansion under the ACA, adults with incomes up to 138% of the FPL-about $21,597 for one person-may be eligible. In states that have not expanded the program, the criteria are more restrictive and generally require the individual to belong to a specific categorical group, such as pregnant women, children, people with disabilities, or seniors.
For immigrants, there is an additional important rule: most states require legal permanent residents to have at least five years of residency in the US to be eligible for Medicaid. Some exceptions apply to children, pregnant women, and refugees, according to specific state legislation.
Differences Between Medicare and Medicaid
Although both are public health programs, their differences are structural and range from the target population to the way they are funded and administered.
| Aspect | Medicare | Medicaid |
|---|---|---|
| Target population | Seniors (65+) and people with specific disabilities | Low-income families and individuals |
| Funding | Federal (taxes, premiums, Treasury) | Federal and state |
| Administration | Federal (CMS) | State, with federal guidelines |
| Eligibility basis | Age, disability, or specific disease | Family income and, in some states, assets |
| Cost to beneficiary | Premiums, deductibles, coinsurance | Generally free or with minimal costs |
Dual Eligibility
Some people may be eligible for both Medicare and Medicaid at the same time, a situation known as Dual Eligibility. This occurs when an individual meets the age or disability criteria for Medicare and also has income low enough to qualify for state Medicaid.
For beneficiaries with dual eligibility, Medicaid can cover costs not included by Medicare, including Part B and D premiums, copayments and coinsurance, long-term care services, and in many states, dental and vision coverage. In 2026, the monthly income limit to qualify as a Qualified Medicare Beneficiary (QMB) is $1,350 for one person in most states.
Planning for Immigrants
For immigrants building a life in the United States, both Medicare and Medicaid represent important health coverage options at different stages of the journey.
In the short term, upon arriving in the US, most immigrants will not be eligible for either program due to the five-year residency rule. The Health Insurance Marketplace (Obamacare) is the most accessible option for obtaining coverage during the first years, with the possibility of subsidies based on income.
In the medium term, after five years as a permanent resident, access to Medicaid may be possible for low-income families, depending on the state of residence. At the same time, contributions to Medicare through formal employment begin to accumulate the necessary quarters for future eligibility.
In the long term, upon reaching age 65 with at least 40 quarters of contributions, the immigrant becomes eligible for Medicare Part A without a monthly premium, ensuring hospital coverage. Part B can be added by paying the standard premium. Knowing these timelines and criteria allows for more assertive financial and migration planning, integrating health coverage into the life project in the country.
Victoria Harper
Editor-in-Chief
Leading journalism and editorial content at Visto n’ Visa, Victoria helps make immigration topics clear, trustworthy, and easy to understand. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.
