Yes, Medicare is a federal government program run by the Centers for Medicare & Medicaid Services

Medicare is a health insurance program operated by the U.S. federal government through the Centers for Medicare & Medicaid Services (CMS), a division of the Department of Health and Human Services. The program began in 1965 and covers hospital care, doctor visits, prescription drugs, and other medical services for people who meet specific age and disability requirements.

Unlike private insurance, which is sold by insurance companies, Medicare is funded through payroll taxes that workers and employers pay during their working years. When you turn 65 or meet other conditions, you become may be able to access to enroll in one of Medicare's parts, each covering different types of care.

The federal government sets the rules for what Medicare covers, how much it pays doctors and hospitals, and what you pay out of pocket. However, private insurance companies do play a role: they administer some Medicare plans and process claims on behalf of the government.

Key Takeaways

  • Medicare is run by the federal government's Centers for Medicare & Medicaid Services, not by private insurance companies.
  • The program is funded through payroll taxes collected from workers and employers over a person's working years.
  • Medicare has four parts—Part A (hospital), Part B (doctor), Part D (drugs), and Part C (private alternative)—each with different coverage and costs.
  • You can enroll in Medicare at 65 or earlier if you have a disability, end-stage renal disease, or ALS.
  • Private insurance companies help administer Medicare plans but do not own or control the program.

The Four Parts of Medicare and What Each Covers

Part A covers inpatient hospital stays, skilled nursing facility care, hospice care, and some home health services. Most people do not pay a monthly premium for Part A because they or their spouse paid Medicare taxes while working. You pay a deductible when you are admitted to the hospital.

Part B covers doctor visits, outpatient care, medical equipment, and preventive services. Part B requires a monthly premium, which changes each year. You also pay a yearly deductible and a percentage of the cost for most services after you meet that deductible.

Part D covers prescription drugs. You choose a Part D plan from private insurance companies that contract with Medicare. Each plan has its own list of covered drugs, monthly premium, and out-of-pocket costs.

Part C, also called Medicare Advantage, is an alternative to Original Medicare (Parts A and B). Private insurance companies offer Part C plans that must cover everything Part A and B cover, but often include prescription drug coverage and extra benefits like dental or vision. You pay a monthly premium to the private insurer, not to Medicare.

Who Pays for Medicare and How It Is Funded

Medicare is funded through the Federal Hospital Insurance Trust Fund and the Federal Supplementary Medical Insurance Trust Fund. Money comes from three sources: payroll taxes paid by workers and employers (2.9 percent of wages, split equally), general federal income tax revenue, and premiums paid by people enrolled in the program.

When you work, you and your employer each pay 1.45 percent of your wages into Medicare. Self-employed people pay the full 2.9 percent. This money goes into a trust fund that pays for Part A benefits. Part B and Part D are funded partly by premiums and partly by general federal tax revenue.

The federal government collects these taxes and manages the trust funds. Congress sets the tax rate and decides how much money goes to each part of Medicare. This is different from private insurance, where insurance companies collect premiums and decide how to spend them based on their own business decisions.

How the Federal Government Controls Medicare

The Centers for Medicare & Medicaid Services (CMS) is the federal agency that runs Medicare day to day. CMS sets payment rates for doctors and hospitals, decides which treatments and drugs Medicare covers, writes the rules for enrollment, and handles disputes between patients and providers.

Congress passes laws that set the broad rules for Medicare—for example, the age at which you can enroll, what services must be covered, and how much beneficiaries pay. The President's administration then enforces those laws through CMS and other agencies.

Private insurance companies that offer Part C and Part D plans must follow CMS rules. They cannot deny coverage for a service that Medicare covers, and they cannot charge more than the government allows. CMS audits these companies to make sure they follow the rules.

The Role of Private Insurance Companies in Medicare

Private insurance companies are involved in Medicare, but they work under government contract, not as owners of the program. For Part C (Medicare Advantage), private insurers create and sell plans that must meet federal standards. For Part D (prescription drugs), private insurers manage the drug benefit plans.

These private companies process claims, pay doctors and pharmacies, and handle customer service. However, they do not decide what Medicare covers or how much the government pays for services. The federal government makes those decisions and pays the insurance companies a fixed amount per person to manage the plans.

Some people confuse private insurance involvement with private ownership. Medicare remains a government program even though private companies help run parts of it. The same is true for Social Security and other federal programs that use private contractors.

Who Can Enroll in Medicare

You can enroll in Medicare at age 65 if you are a U.S. citizen or permanent resident who has lived in the country for at least five years. You do not have to be retired to enroll, though most people are.

You can also enroll before 65 if you have been receiving Social Security Disability Insurance (SSDI) for at least 24 months, have end-stage renal disease (ESRD), or have amyotrophic lateral sclerosis (ALS). Each of these conditions has specific rules about when you become may be able to access.

Enrollment happens during specific periods. Your initial enrollment period is the three months before the month you turn 65, the month itself, and the three months after. If you miss this window, you may face a permanent penalty on your premiums.

Medicare vs. Medicaid: Two Different Government Programs

Medicare and Medicaid are both government health programs, but they are separate and serve different groups. Medicare is a federal program for people 65 and older and some younger people with disabilities. It is based on work history and payroll taxes.

Medicaid is a joint federal and state program for people with low income. Each state runs its own Medicaid program within federal guidelines, so rules vary by state. Medicaid covers more services than Medicare in some cases but is only available to people who meet income limits.

Some people are enrolled in both programs, called "dual may be able to access." They use Medicare as their primary insurance and Medicaid to help pay Medicare costs and cover services Medicare does not cover.

Frequently Asked Questions

Is Medicare the same as Social Security?

No. Social Security is a separate federal program that provides retirement, disability, and survivor benefits based on work history. Medicare is health insurance. You can receive one, both, or neither depending on your age and work record. Many people enroll in Medicare at 65 and receive Social Security retirement benefits at the same time, but they are different programs.

Can I use Medicare at any hospital or doctor?

With Original Medicare (Parts A and B), you can see any doctor or hospital that accepts Medicare. With Medicare Advantage (Part C), you usually must use doctors and hospitals in the plan's network, similar to a private HMO. Check your plan's provider list before scheduling care.

Do I have to enroll in Medicare when I turn 65?

You should enroll during your initial enrollment period to avoid penalties, but you may not have to if you are still working and covered by your employer's health plan. If you delay enrollment, you may pay higher premiums for life. Talk to your employer's benefits office about your options.

What happens if I do not pay my Medicare premiums?

If you do not pay your Part B or Part D premiums, CMS may disenroll you from that part of Medicare. You can re-enroll during the general enrollment period (January 1 to March 31 each year), but you may face a permanent penalty on your premiums.

Does Medicare cover everything?

No. Medicare does not cover dental care, vision care, hearing aids, or long-term care in a nursing home or at home. It also does not cover all prescription drugs or all doctor visits. Many people buy supplemental insurance (Medigap) or choose Medicare Advantage to fill these gaps.