
Medicare is a federal health insurance program in the United States for people aged 65 or older and younger people with disabilities. It is divided into four parts: A, B, C, and D. Each part covers different services, such as hospital care, outpatient services, prescription drugs, and alternative private plans. Medicare is different from private insurance as it doesn't offer plans for couples or families, and individuals must sign up for each part separately. When an individual has both Medicare and other health insurance, one insurance will be the primary payer, paying up to its coverage limits, and the other will be the secondary payer, covering the remaining balance. This raises the question: is Medicare the same as other forms of insurance, or are there significant differences between them?
| Characteristics | Values |
|---|---|
| Medicare in the US | A federal health insurance program for people aged 65 or older and younger people with disabilities |
| Number of people covered by Medicare in 2022 | 65 million |
| Number of parts | 4 |
| Part A | Covers hospital, skilled nursing, and hospice services |
| Part B | Covers outpatient services |
| Part C | Allows patients to choose private plans with different benefit structures that provide the same services as Parts A and B, usually with additional benefits |
| Part D | Covers self-administered prescription drugs |
| Medicare and other insurance | If you have Medicare and other health insurance, each type of coverage is called a "payer". The "primary payer" pays up to the limits of its coverage, then sends the rest of the balance to the "secondary payer" |
| Medicare Supplement Insurance (Medigap) | Extra insurance you can buy from a private company that helps pay your share of costs in Original Medicare |
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What You'll Learn

Medicare Part A and Part B
Medicare is federal health insurance for anyone aged 65 and older and some people under 65 with certain disabilities or conditions. Medicare Part A and Part B are together known as Original Medicare.
Medicare Part A is hospital insurance, which covers inpatient care in hospitals, skilled nursing facility care, hospice care, and home health care. Most people get Part A for free, but some have to pay a premium for this coverage. To be eligible for premium-free Part A, an individual must be entitled to receive Medicare based on their own earnings or those of a spouse, parent, or child. To receive premium-free Part A, the worker must have a specified number of quarters of coverage (QCs) and file an application for Social Security or Railroad Retirement Board (RRB) benefits. The exact number of QCs required depends on whether the person is filing for Part A based on age, disability, or End Stage Renal Disease (ESRD). Individuals receiving monthly Social Security or RRB benefits at least four months before turning 65 will get Part A automatically at age 65. Those not receiving these benefits must file an application for Medicare by contacting the Social Security Administration. People who must pay a premium for Part A do not automatically get Medicare when they turn 65. They must file an application to enrol and also enrol in or already have Part B. To keep premium Part A, the person must continue to pay all monthly premiums and stay enrolled in Part B.
Medicare Part B is medical insurance. To be eligible for Part B, one must enrol in or already have Part A. Medicare Supplement Insurance (Medigap) is extra insurance that helps pay one's share of costs in Original Medicare. Generally, one needs Part A and Part B to buy a Medigap policy. Some Medigap policies offer coverage when one travels outside the US. Generally, Medigap policies do not cover long-term care, vision, dental, hearing aids, private-duty nursing, or prescription drugs. If one is under 65, they might not be able to buy a Medigap policy or may have to pay more.
Once one has signed up for Part A and Part B, they can choose between Original Medicare and Medicare Advantage. Medicare Advantage is a Medicare-approved plan from a private company that offers an alternative to Original Medicare for health and drug coverage. These "bundled" plans include Part A, Part B, and usually Part D. In many cases, one can only use doctors who are in the plan's network. Plans often have different out-of-pocket costs than Original Medicare or supplemental coverage like Medigap.
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Medicare Advantage Plan
Medicare is a federal health insurance program for people over 65 or those with specific disabilities or conditions. It is not the same as regular insurance, as it is a government-funded program with its own set of rules and regulations. Medicare Advantage Plans, also known as Part C or MA plans, are a type of Medicare health plan offered by private companies that contract with Medicare. These companies must follow the rules set by Medicare, and the plans are approved by Medicare.
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Medicare Supplement Insurance (Medigap)
Medicare is a form of health insurance for people over 65 or under 65 with a qualifying disability or illness. It is funded by the US federal government but administered by private insurance companies approved by Medicare. Medicare consists of several parts, including Part A (Hospital Insurance) and Part B (Medical Insurance).
Medicare Supplement Insurance, or Medigap, is an additional insurance policy that can be purchased from a private company to help cover out-of-pocket costs in Original Medicare (Parts A and B). Medigap policies generally do not cover long-term care, such as nursing home stays, or dental, vision, and hearing services. Some Medigap policies offer coverage for travel outside the US, and generally, you need Parts A and B to buy a Medigap policy. Medigap policies are standardized and named by letters, like Plan G or Plan K, with the benefits being the same no matter the insurance company. The price is the only difference between policies with the same letter sold by different companies.
If you have both Medicare and other health insurance, such as from an employer or union, each type of coverage is called a "payer". The "primary payer" pays up to its coverage limit and then sends the remaining balance to the "secondary payer". If the secondary payer does not cover the remaining balance, the individual may be responsible for the remaining costs. This order of payment is called "coordination of benefits".
It is important to note that Medicare Advantage is different from Medigap. After signing up for Parts A and B, individuals can choose between Original Medicare and Medicare Advantage. Medicare Advantage Plans often include Part D prescription drug coverage, which is optional in Original Medicare.
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Medicare for those under 65
Medicare is a federal health insurance program primarily for people aged 65 and over. However, Medicare is also available to some people under 65 in certain circumstances.
If you are under 65 and receiving Social Security disability benefits, you will automatically get Medicare after receiving disability benefits for 24 months or when you turn 65, whichever comes first. You will receive a welcome package with your Medicare card three months before your coverage starts.
If you have ALS, also known as Lou Gehrig's disease, you will receive Medicare automatically as soon as you start receiving disability benefits.
People under 65 with disabilities comprise 8.4% of Medicare recipients, nearly double the percentage in the general US population. Medicare coverage for this group includes certain hospital, nursing home, home health, physician, and community-based services. The healthcare services do not have to be related to the individual's disability to be covered. There are no illnesses or underlying conditions that disqualify people from Medicare coverage.
Medicare Supplement Insurance (Medigap)
If you are under 65, you may find it challenging to buy a Medigap policy or may have to pay more. Medigap is extra insurance that helps pay your share of costs in Original Medicare, and generally, you need Part A and Part B to buy a Medigap policy.
Medicare and other insurance:
If you have Medicare and other health insurance, such as from a group health plan or Medicaid, each type of coverage is called a "payer." The "primary payer" pays up to its coverage limit and then sends the remaining balance to the "secondary payer." If the secondary payer doesn't cover the remaining balance, you may be responsible for the remaining costs.
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Medicare and other insurance
Medicare is a federal health insurance program in the United States for people aged 65 or older, as well as younger people with disabilities. It is divided into four parts: A, B, C, and D. Part A covers inpatient hospital care, skilled nursing, and hospice services, while Part B covers outpatient services and doctor's services and tests. Part D covers self-administered prescription drugs, and Part C, also known as Medicare Advantage, allows patients to choose private health plans with different benefit structures that provide the same services as Parts A and B, often with additional benefits.
Medicare is different from private insurance in that it does not offer plans for couples or families. Individuals must sign up for Part A and Part B individually, and each year, they can choose how they want to receive their health coverage and add or switch drug coverage. If you choose Original Medicare, you can also decide whether you want drug coverage (Part D) and supplemental coverage, such as Medigap, which helps pay for costs in Original Medicare.
If you have Medicare and other health insurance, such as from an employer or retiree coverage, each type of coverage is called a "payer." The "primary payer" pays up to the limits of its coverage and then sends the remaining balance to the "secondary payer." If the secondary payer does not cover the remaining balance, the individual may be responsible for the remaining costs. The order of payment in this situation is called "coordination of benefits."
It is important to note that Medicare does not cover all medical costs, and some services may not be covered at all. Additionally, Medicare may only pay for items and services that are deemed "reasonable and necessary for the diagnosis or treatment of illness or injury or to improve the functioning of a malformed body member." As a result, individuals may need to pay out-of-pocket expenses for premiums, deductibles, and coinsurance.
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Frequently asked questions
Medicare is a federal health insurance program in the United States for people aged 65 or older and younger people with disabilities.
Medicare is divided into four parts: Part A, Part B, Part C, and Part D. Part A covers hospital, skilled nursing, and hospice services. Part B covers outpatient services. Part D covers self-administered prescription drugs. Part C is an alternative that allows patients to choose private plans with different benefit structures that provide the same services as Parts A and B, usually with additional benefits.
Medicare is different from private insurance as it is administered by the federal government and does not offer plans for couples or families. Additionally, Medicare's cost growth is expected to remain well below that of private insurance for the next decade.
Yes, you can have both Medicare and other health insurance, such as from your employer or union. In this case, one insurance will be the "primary payer" and the other will be the "secondary payer". The primary payer pays up to the limits of its coverage, and then sends the rest of the balance to the secondary payer.









































