Medicare and Medicaid: The Key Distinction

Medicare and Medicaid are both government-run health insurance programs, but they serve different populations, have different eligibility rules, and cover different services. Confusing the two is one of the most common healthcare finance mistakes Americans make — and it can cost you coverage you are entitled to.

In short: Medicare is primarily age-based (for people 65 and older, and some younger people with disabilities). Medicaid is income-based (for people with low income, regardless of age).

What Is Medicare?

Medicare is a federal health insurance program administered by the Centers for Medicare and Medicaid Services (CMS). In 2026, approximately 68 million Americans are enrolled.

Medicare has four parts:

• Part A (Hospital Insurance): Covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health care. Most people pay $0 in premiums if they or their spouse paid Medicare taxes for 10+ years.
• Part B (Medical Insurance): Covers outpatient care, doctor visits, preventive services, and medical equipment. The standard Part B premium in 2026 is approximately $185/month (income-adjusted via IRMAA surcharges for higher earners).
• Part C (Medicare Advantage): Private insurance plans that bundle Parts A, B, and usually D. Often includes dental, vision, and hearing benefits not covered by Original Medicare.
• Part D (Prescription Drug Coverage): Private plans that cover prescription drugs. As of 2025, the Inflation Reduction Act capped out-of-pocket drug costs at $2,000 per year for Medicare enrollees.

What Is Medicaid?

Medicaid is a joint federal-state program that provides comprehensive health coverage to people with low income. Unlike Medicare, Medicaid is income-tested and varies significantly by state.

In 2026, Medicaid covers roughly 85 million Americans, including:

• Low-income adults and families
• Pregnant women
• Children (via CHIP, the Children’s Health Insurance Program)
• Seniors and people with disabilities who have low income (dual eligible)

Income eligibility is generally set at or below 138% of the federal poverty level in states that expanded Medicaid under the Affordable Care Act. In 2026, that is approximately $20,200 for an individual.

Medicare vs. Medicaid: Side-by-Side Comparison

Dual Eligibility: Can You Have Both?

Yes. About 12 million Americans are “dual eligible” — they qualify for both Medicare and Medicaid. This typically happens when someone is 65 or older AND has low income. In this case, Medicaid often pays Medicare premiums, deductibles, and copays, making healthcare nearly free.

How to Apply

• Medicare: You are enrolled automatically at 65 if you receive Social Security benefits. Otherwise, enroll during your Initial Enrollment Period (the 7-month window around your 65th birthday) at SSA.gov.
• Medicaid: Apply through your state Medicaid agency or via HealthCare.gov. Enrollment is year-round — no special enrollment period required.

Understanding your insurance options is part of a solid retirement plan. See our guide on how to save for retirement in your 30s for the full picture.

Frequently Asked Questions

Does Medicare cover nursing home care long-term?
No. Medicare covers skilled nursing facility care for up to 100 days under specific conditions. Long-term custodial care is covered by Medicaid, not Medicare.

Can I use both Medicare and Medicaid?
Yes. Dual eligibles get coordinated coverage from both programs, typically with very low or no out-of-pocket costs.

Is Medicaid free?
For most enrollees, premiums are $0 and cost-sharing is minimal. Some states charge small monthly premiums for adults above a certain income threshold.

Bottom Line

Medicare = age-based federal health insurance, primarily for people 65 and older. Medicaid = income-based federal-state health insurance for low-income individuals of any age. Knowing which program you qualify for — or whether you qualify for both — can save you thousands of dollars per year in healthcare costs.