Learn About Medicare and Medicaid Eligibility Requirements

What Medicare and Medicaid Are: Two Different Programs

Medicare and Medicaid are two major government health insurance programs in the United States, but they work very differently. Many people confuse them because their names are similar, but understanding the differences is important when learning about each program.

Medicare is a federal health insurance program primarily for people age 65 and older, regardless of income or medical history. The program started in 1965 and currently covers more than 66 million Americans. Medicare is funded through payroll taxes paid by workers and employers during a person's working years. When someone reaches 65, they become a Medicare participant if they meet certain requirements. The program also covers some younger people with disabilities and people with end-stage renal disease (permanent kidney failure).

Medicaid is a joint federal and state program that provides health coverage to low-income individuals and families. Unlike Medicare, Medicaid eligibility varies significantly by state because each state designs its own program within federal guidelines. Medicaid covers about 75 million Americans, making it one of the largest health insurance programs in the country. A person's income level is a primary factor in determining Medicaid coverage, but other factors like family size, age, disability status, and pregnancy also matter.

The funding sources are different too. Medicare is primarily funded through the Federal Insurance Contributions Act (FICA) taxes that working people pay. Medicaid is funded through a combination of federal and state taxes, with the federal government covering a portion and states covering the rest.

• Medicare serves seniors (65+), some younger people with disabilities, and those with end-stage renal disease
• Medicaid serves low-income individuals and families of any age
• Medicare is the same nationwide; Medicaid varies by state
• Medicare is paid for through payroll taxes; Medicaid is paid through federal and state taxes

Practical Takeaway: Start by identifying which program might apply to your situation. If you're approaching 65, focus on Medicare information. If you have a lower income and aren't yet 65, look into Medicaid rules for your state. Some people qualify for both programs, which is called "dual coverage."

Medicare Eligibility: Who Can Participate

Most people become eligible for Medicare at age 65. You don't have to take any action to get Medicare if you were already receiving Social Security benefits—Medicare enrollment happens automatically. However, if you haven't started receiving Social Security, you will need to take steps to enroll in Medicare when you turn 65.

To be eligible for Medicare at 65, you generally must be a U.S. citizen or a lawful permanent resident who has lived in the United States for at least five consecutive years. You should also have worked for at least 10 years (40 quarters) while paying Medicare taxes, either as an employee or self-employed person. If you worked long enough in the railroad industry, that time may count toward Medicare eligibility too.

Medicare Part A (hospital insurance) is premium-free for most people who meet the age and work history requirements. Part B (medical insurance) requires a monthly premium, which changes yearly. In 2024, the standard Part B premium is $174.70 per month, though some people with higher incomes pay more.

People under 65 can also become eligible for Medicare in certain circumstances. If you've been receiving Social Security disability benefits for 24 months, you become eligible for Medicare. Additionally, if you have end-stage renal disease (ESRD)—permanent kidney failure requiring dialysis or a transplant—you may be covered by Medicare regardless of age. People diagnosed with amyotrophic lateral sclerosis (ALS), also called Lou Gehrig's disease, become eligible for Medicare immediately without a waiting period.

If you are a federal employee or railroad employee, you may have different eligibility rules. Federal employees who worked for the government for at least five years may have coverage options. Railroad employees have a separate system through the Railroad Retirement Board.

• Age 65 is the standard eligibility age for Medicare
• You must be a U.S. citizen or lawful permanent resident (living here 5+ years)
• You typically need 40 quarters of work history paying Medicare taxes
• Medicare Part A is usually premium-free; Part B requires a monthly premium
• People under 65 may be eligible if they receive disability benefits for 24 months, have ESRD, or have ALS
• Some groups like federal and railroad employees have different rules

Practical Takeaway: If you're approaching 65, review your work history to confirm you have enough quarters of Medicare tax payments. You can create a "my Social Security" account online to verify your earnings record and see your estimated Medicare eligibility. If you're under 65, check whether you qualify through disability, ESRD, or ALS status by contacting the Social Security Administration.

Medicare Parts Explained: Coverage Options

Medicare has different parts, and understanding what each part covers helps you learn how the program works. Not all parts are automatic—you may need to make choices about your coverage.

Medicare Part A covers hospital stays, skilled nursing facility care, hospice care, and some home health services. Part A covers the costs of a hospital room, meals, nursing services, and most medications and medical supplies used during your hospital stay. If you need ongoing care after leaving the hospital, Part A may cover a portion of skilled nursing facility costs for up to 100 days per benefit period. Hospice care, which provides comfort care for people with terminal illnesses, is also covered. Most people don't pay a monthly premium for Part A if they meet the work history requirement.

Medicare Part B is medical insurance that covers doctor visits, outpatient services, diagnostic tests, medical equipment, and some preventive services. Part B requires a monthly premium. It also requires you to pay a yearly deductible (the amount you pay before Medicare starts sharing costs) and a coinsurance amount (your share of the cost after the deductible is met). In 2024, the Part B deductible is $240 per year.

Medicare Part D covers prescription drugs. This is optional, and you choose a plan offered by insurance companies approved by Medicare. Different Part D plans cover different drugs at different costs. If you don't sign up for Part D when you first become eligible, you may pay a penalty if you join later.

Medicare Part C, also called Medicare Advantage, is an alternative to Original Medicare. Instead of getting Part A and B coverage directly from Medicare, you get your coverage from a private insurance company approved by Medicare. These plans often include Part D coverage and may offer additional benefits like dental or vision care. However, you typically must use doctors and hospitals in the plan's network.

• Part A: Hospital, skilled nursing facility, hospice, and home health coverage
• Part B: Doctor visits, outpatient services, tests, and preventive care
• Part C (Medicare Advantage): Private insurance alternative to Parts A and B
• Part D: Prescription drug coverage through private insurance companies
• Supplemental insurance (Medigap) can help pay out-of-pocket costs with Original Medicare

Practical Takeaway: When you turn 65, you'll need to decide between Original Medicare (Parts A, B, and D) or Medicare Advantage (Part C). Original Medicare gives you more flexibility in choosing doctors, while Medicare Advantage plans may have lower costs but require using in-network providers. Review coverage options during the Annual Enrollment Period (October 15 to December 7) if you need to make changes.

Medicaid Eligibility: Income, Family Size, and State Rules

Medicaid is a program for people with lower incomes, but exactly what "lower income" means depends on where you live. Each state sets its own Medicaid income limits, which means a person may be eligible in one state but not in another. This variation exists because states have flexibility in how they design their Medicaid programs within federal guidelines.

Income is the primary factor in Medicaid eligibility, but family size matters too. A family of four has a higher income limit than a single person. The federal poverty level is used as a baseline