Medicare and Medicaid are both government health insurance programs, and the similar names cause endless confusion. They serve different populations, work through different systems, are funded differently, and cover different services. Some people qualify for both simultaneously.
This guide explains both programs in plain English — who they are for, what they cover, how much they cost, and how to enroll.
The Core Difference
Medicare is federal health insurance for people 65 and older (and some younger people with disabilities). It is an entitlement — you earn it through years of paying payroll taxes, and your income does not affect eligibility.
Medicaid is a joint federal-state health insurance program for people with low incomes. Eligibility is based primarily on income, and benefits vary significantly by state.
| Factor | Medicare | Medicaid |
|---|---|---|
| Who it’s for | People 65+, some disabled | Low-income individuals/families |
| Eligibility | Age or disability | Income-based |
| Funded by | Federal government (payroll taxes) | Federal + state governments |
| Managed by | Federal (CMS) | Each state individually |
| Cost to you | Premiums, deductibles, copays | Little to no cost |
| Income matters? | No (except for premium surcharges) | Yes — primary eligibility factor |
| Uniform nationwide? | Yes (same rules everywhere) | No (varies by state) |
Medicare Explained
Who Qualifies
- Age 65+: Anyone who is 65 or older and has been a US citizen or permanent resident for at least 5 years
- Under 65 with disability: People who have received Social Security Disability Insurance (SSDI) for 24 months
- End-Stage Renal Disease (ESRD): Anyone requiring dialysis or a kidney transplant, regardless of age
- ALS (Lou Gehrig’s Disease): Automatic eligibility upon SSDI approval
Most people qualify for premium-free Part A (hospital insurance) if they or their spouse paid Medicare taxes for at least 10 years (40 quarters).
The Four Parts of Medicare
Part A — Hospital Insurance
Covers inpatient hospital stays, skilled nursing facility care, hospice care, and some home health services.
Cost: $0 premium for most people (those who paid Medicare taxes for 10+ years). $278/month or $505/month for those who did not.
Deductible: $1,676 per benefit period (2026).
Part B — Medical Insurance
Covers doctor visits, outpatient care, preventive services, durable medical equipment, and some home health services.
Cost: Standard premium of $185/month (2026). Higher-income beneficiaries pay more (up to $594/month).
Deductible: $257/year (2026), then you pay 20% coinsurance for most services.
Part C — Medicare Advantage
Private insurance plans that combine Part A and Part B coverage, often with additional benefits like dental, vision, hearing, and prescription drugs. Plans must cover everything Original Medicare covers but can have different costs and rules.
Cost: Varies by plan. Many have $0 premiums (you still pay Part B premium). Copays and out-of-pocket maximums vary.
Key benefit: Out-of-pocket maximum cap (Original Medicare has none).
Part D — Prescription Drug Coverage
Covers prescription medications. Available as standalone plans (with Original Medicare) or included in Medicare Advantage plans.
Cost: Average premium of $35-45/month. Varies by plan and medications covered.
What Medicare Does NOT Cover
This surprises many new enrollees:
- Dental care (routine cleanings, fillings, dentures)
- Vision care (eye exams, glasses, contacts)
- Hearing aids
- Long-term care (nursing homes for custodial care)
- Care outside the US (with limited exceptions)
Medicare Advantage plans often include dental, vision, and hearing coverage — one of the main reasons 54% of Medicare beneficiaries now choose Advantage plans.
Medicare Costs Summary
| Component | Annual Cost (Typical) |
|---|---|
| Part B premium | $2,220 |
| Part D premium | $420-540 |
| Part A deductible | $1,676 (per hospital stay) |
| Part B deductible | $257 |
| Part B coinsurance (20%) | Varies by usage |
| Estimated total | $4,000-8,000/year |
Supplemental insurance (Medigap) can cover deductibles, coinsurance, and copays for an additional $100-300/month.
Medicaid Explained
Who Qualifies
Medicaid eligibility varies by state, but federal guidelines establish minimum categories:
- Low-income adults: In 40 states that expanded Medicaid, adults earning up to 138% of the Federal Poverty Level ($20,783/year for an individual in 2026) qualify
- Children: Through CHIP, children in families earning up to 200-300% FPL qualify in most states
- Pregnant women: Coverage during pregnancy and for 60 days postpartum, income limits vary by state
- Elderly and disabled: Low-income seniors and people with disabilities
- Parents/caretakers: Low-income parents, though income limits are lower than for general adults in some states
Expansion vs. non-expansion states: 10 states have not expanded Medicaid under the ACA. In these states, childless adults may not qualify regardless of how low their income is — creating a “coverage gap” where people earn too much for Medicaid but too little for marketplace subsidies.
What Medicaid Covers
Federal law requires all state Medicaid programs to cover:
- Inpatient and outpatient hospital services
- Physician services
- Laboratory and X-ray services
- Nursing facility services
- Home health services
- Preventive care and screenings
- Family planning services
States can add optional benefits, and most cover:
- Prescription drugs
- Dental care
- Vision care
- Mental health services
- Rehabilitation services
- Transportation to medical appointments
What Medicaid Costs
Medicaid has minimal out-of-pocket costs:
- Premiums: $0 in most states (some charge small premiums for higher-income enrollees)
- Copays: $0-4 for most services
- Deductibles: Rare and minimal
- Out-of-pocket maximum: States set caps, typically very low
For most Medicaid beneficiaries, healthcare is essentially free at the point of service.
Dual Eligibility: Medicare + Medicaid
About 12 million Americans qualify for both Medicare and Medicaid simultaneously — called “dual-eligible” beneficiaries. This typically includes:
- Low-income seniors (65+) who qualify for Medicare by age and Medicaid by income
- People under 65 with disabilities who qualify for both programs
Benefits of dual eligibility:
- Medicaid covers Medicare premiums, deductibles, and copays
- Medicaid fills gaps in Medicare coverage (dental, vision, long-term care)
- Prescription drug costs are minimal (low-income subsidy for Part D)
If you qualify for both, you pay virtually nothing for comprehensive healthcare coverage.
How to Enroll
Medicare Enrollment
Initial Enrollment Period (IEP): 7-month window around your 65th birthday (3 months before, your birthday month, 3 months after). Missing this window results in permanent premium penalties.
Annual Election Period: October 15 - December 7 each year. Switch between Original Medicare and Medicare Advantage, or change Part D plans.
Special Enrollment Period: Available if you delayed enrollment because you had employer coverage.
Medicaid Enrollment
No enrollment period — apply any time. Medicaid enrollment is open year-round. Apply through your state’s Medicaid agency or through HealthCare.gov.
Application process:
- Gather income documentation (pay stubs, tax returns, self-employment records)
- Apply online, by phone, by mail, or in person
- Receive determination within 45 days (90 days for disability-based applications)
- If approved, coverage often starts retroactively to the application date
Frequently Asked Questions
Can I have Medicare and private insurance at the same time? Yes. Many people supplement Medicare with Medigap (supplemental) insurance or employer retiree coverage. Medicare pays first, then the supplemental plan covers remaining costs.
Does Medicaid cover nursing home care? Yes. Medicaid is the primary payer for long-term nursing home care in the US, covering about 62% of all nursing home residents. Medicare only covers short-term skilled nursing (up to 100 days) following a hospital stay.
What if I make too much for Medicaid but can not afford marketplace insurance? In most states, ACA marketplace subsidies bridge this gap. Subsidies are available for incomes from 100-400% FPL. If you are in a non-expansion state and fall in the coverage gap, contact your state’s health department for assistance programs.
Can immigrants qualify for Medicare or Medicaid? Legal permanent residents qualify for Medicare after 5 years of residency and work history. Medicaid rules vary by state and immigration status. Emergency Medicaid covers emergency services regardless of immigration status.
When should I sign up for Medicare? During your Initial Enrollment Period (around your 65th birthday) unless you have employer coverage. Late enrollment in Part B results in a 10% premium penalty for each 12-month period you could have enrolled but did not.
Which Program Is Right for You?
If you are approaching 65: You will enroll in Medicare. The decision is whether to choose Original Medicare + Medigap + Part D, or a Medicare Advantage plan that bundles everything.
If you have low income: Check Medicaid eligibility in your state. Apply anytime — there is no enrollment period to miss.
If you might qualify for both: Contact your State Health Insurance Assistance Program (SHIP) for free, unbiased counseling on maximizing your benefits.
Need help choosing? Use our free Medicare plan comparison tool to find the best coverage options in your area, or check your Medicaid eligibility in under 2 minutes.
