The Core Difference Between Medicare and Medicaid

Medicare is a federal health insurance program for people 65 and older, regardless of income. Medicaid is a joint federal and state program that covers low-income individuals and families of any age. The two programs are separate, funded differently, and cover different groups of people—but the names are so similar that confusion is common.

Medicare comes from Social Security taxes you paid during your working years. Medicaid comes from federal and state tax dollars. If you are 65 or older, you are likely may be able to access for Medicare. If you have a low income, you may be may be able to access for Medicaid, but the income limits and rules vary by state.

Key Takeaways

  • Medicare is for people 65 and older; Medicaid is for low-income individuals and families of any age.
  • Medicare is run by the federal government; Medicaid is run by individual states with federal funding, so coverage rules differ by state.
  • Medicare has the same basic coverage nationwide; Medicaid benefits, income limits, and covered services vary widely depending on where you live.
  • You can have both Medicare and Medicaid at the same time—this is called "dual coverage" and is common for low-income seniors.
  • Medicare requires you to enroll at 65 or face penalties; Medicaid enrollment is ongoing and rules change if your income changes.

Who Medicare Covers

Medicare covers almost everyone at age 65, with very few exceptions. You do not need to be retired, and your income does not matter. If you worked and paid Medicare taxes for at least 10 years (40 quarters), you are covered. If you did not work that long, you can still buy Medicare coverage at age 65, though the monthly premium will be higher.

Some younger people also may have access to for Medicare: those on Social Security Disability Insurance (SSDI) for at least two years, people with end-stage renal disease, and people with ALS (Lou Gehrig's disease). But the vast majority of Medicare beneficiaries are 65 or older.

Who Medicaid Covers

Medicaid covers low-income individuals and families, but the income thresholds and rules differ by state. In general, Medicaid covers children, pregnant people, parents, seniors, and people with disabilities—but only if their income falls below their state's limit. Some states have expanded Medicaid to cover more working-age adults; others have not.

Because Medicaid is state-run, a person who qualifies in one state may not may have access to in another. For example, the income limit for a single adult might be $1,500 per month in one state and $900 in another. Your state's Medicaid office can tell you whether you meet the income and other requirements where you live.

How Medicare and Medicaid Coverage Works

Medicare has four parts. Part A covers hospital stays, skilled nursing care, and hospice. Part B covers doctor visits, outpatient care, and medical equipment. Part D covers prescription drugs. Part C (Medicare Advantage) is an alternative way to get Parts A and B through a private insurance company. Most people pay a monthly premium for Part B and Part D, and there are deductibles and copays.

Medicaid coverage varies by state, but typically covers doctor visits, hospital care, prescription drugs, and long-term care. Some states cover dental and vision care; others do not. Medicaid usually has lower or no copays than Medicare, especially for low-income beneficiaries. However, fewer doctors and hospitals accept Medicaid than accept Medicare, so finding a provider can be harder in some areas.

When You Can Have Both Medicare and Medicaid

You can be enrolled in both programs at the same time. This is called dual coverage or being "dual may be able to access." It is common for people 65 and older with low incomes. When you have both, Medicare is your primary insurance and pays first; Medicaid pays second and often covers the costs Medicare does not, such as copays and premiums.

If you are on Medicaid and turn 65, you automatically stay on Medicaid if you still meet the income limit. You will also be enrolled in Medicare Part A and Part B automatically. Some states have special programs for dual-may be able to access people that coordinate the two programs and may offer extra benefits like dental or vision care.

Enrollment Timing and important date

Medicare enrollment happens once a year during the Initial Enrollment Period (the three months before, the month of, and three months after your 65th birthday) or during the General Enrollment Period (January 1 to March 31 each year). If you miss these windows, you may face a permanent penalty on your premiums. However, if you are still working and have health insurance through your employer, you may be able to delay enrollment without penalty.

Medicaid enrollment is ongoing—you can explore at any time, and there is no enrollment period or important date. However, your coverage can end if your income rises above your state's limit or if you no longer meet other requirements. You should report any changes in income or household size to your state Medicaid office right away.

Cost Differences Between the Programs

Medicare requires monthly premiums for Part B and Part D, and you pay deductibles and copays when you use services. The exact amounts change each year. Part A is usually free if you paid Medicare taxes for 10 years, but there is a deductible for hospital stays.

Medicaid is based on income. If you may have access to, your costs are usually much lower than Medicare—many people pay nothing for doctor visits or prescriptions. However, Medicaid is only available if your income is low enough. Once your income exceeds your state's limit, you lose Medicaid coverage entirely, even if you cannot afford private insurance.

Frequently Asked Questions

Can I have Medicare and Medicaid at the same time?

Yes. If you are 65 or older with a low income, you can have both. Medicare pays first, and Medicaid covers costs Medicare does not pay. This is called dual coverage and is common for low-income seniors.

What happens to my Medicaid when I turn 65?

You stay on Medicaid if your income is still below your state's limit. You will also be automatically enrolled in Medicare Part A and Part B. You will then have both programs, with Medicare as your primary insurance.

Do all states have the same Medicaid rules?

No. Each state sets its own income limits, decides which services to cover, and determines who is may be able to access. A person who qualifies for Medicaid in one state may not may have access to in another. Contact your state Medicaid office to learn the rules where you live.

What if I miss the Medicare enrollment important date?

If you miss your Initial Enrollment Period and do not have other health coverage, you can enroll during the General Enrollment Period (January 1 to March 31), but you will pay a higher premium for life. If you were still working with employer coverage, you may have a special enrollment period without penalty.

Is Medicaid the same as Medicare?

No. Medicare is for people 65 and older; Medicaid is for low-income individuals and families of any age. Medicare is run by the federal government; Medicaid is run by states. They are separate programs with different rules, coverage, and costs.