Skip Navigation

Glossary - M

This glossary explains terms in the Medicare program.

M

Medicaid

A joint federal and state program that helps with medical costs for some people with limited income and resources. Medicaid programs vary from state to state, but most health care costs are covered if you qualify for both Medicare and Medicaid.

Medicaid-certified provider

A health care provider (like a home health agency, hospital, nursing home, or dialysis facility) that's been approved by Medicaid. Providers are approved or "certified" if they've passed an inspection conducted by a state government agency.

Medical emergency

When you believe you have an injury or illness that requires immediate medical attention to prevent a disability or death.

Medically necessary

Health care services or supplies needed to prevent, diagnose, or treat an illness, injury, condition, disease, or its symptoms and that meet accepted standards of medicine.

Medical underwriting

The process that an insurance company uses to decide, based on your medical history, whether to take your application for insurance, whether to add a waiting period for pre-existing conditions (if your state law allows it), and how much to charge you for that insurance.

Medicare

Medicare is the federal health insurance program for people who are 65 or older, certain younger people with disabilities, and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD).

Medicare Administrative Contractor (MAC)

A company that processes claims for Medicare.

Medicare Advantage Plan (Part C)

A Medicare Advantage Plan is a type of Medicare health plan offered by a private company that contracts with Medicare to provide you with all your Part A and Part B benefits. Medicare Advantage Plans include Health Maintenance Organizations, Preferred Provider Organizations, Private Fee-for-Service Plans, Special Needs Plans, and Medicare Medical Savings Account Plans. If you're enrolled in a Medicare Advantage Plan, Medicare services are covered through the plan and aren't paid for under Original Medicare. Most Medicare Advantage Plans offer prescription drug coverage.

Medicare Advantage Prescription Drug (MA-PD) Plan

A Medicare Advantage plan that offers Medicare prescription drug coverage (Part D), Part A, and Part B benefits in one plan.

Medicare-approved amount

In Original Medicare, this is the amount a doctor or supplier that accepts assignment can be paid. It may be less than the actual amount a doctor or supplier charges. Medicare pays part of this amount and you’re responsible for the difference.

Medicare-approved supplier

A company, person, or agency that's been certified by Medicare to give you a medical item or service, except when you're an inpatient in a hospital or skilled nursing facility.

Medicare-certified provider

A health care provider (like a home health agency, hospital, nursing home, or dialysis facility) that's been approved by Medicare. Providers are approved or "certified" by Medicare if they've passed an inspection conducted by a state government agency. Medicare only covers care given by providers who are certified.

Medicare Cost Plan

A type of Medicare health plan available in some areas. In a Medicare Cost Plan, if you get services outside of the plan's network without a referral, your Medicare-covered services will be paid for under Original Medicare (your Cost Plan pays for emergency services or urgently needed services).

Medicare Health Maintenance Organization (HMO) Plan

A type of Medicare Advantage Plan (Part C) available in some areas of the country. In most HMOs, you can only go to doctors, specialists, or hospitals on the plan's list except in an emergency. Most HMOs also require you to get a referral from your primary care physician.

Medicare health plan

Generally, a plan offered by a private company that contracts with Medicare to provide Part A and Part B benefits to people with Medicare who enroll in the plan. Medicare health plans include all Medicare Advantage Plans, Medicare Cost Plans, and Demonstration/Pilot Programs. Programs of All-inclusive Care for the Elderly (PACE) organizations are special types of Medicare health plans that can be offered by public or private entities and provide Part D and other benefits in addition to Part A and Part B benefits.

Medicare Medical Savings Account (MSA) Plan

MSA Plans combine a high deductible Medicare Advantage Plan and a bank account. The plan deposits money from Medicare into the account. You can use the money in this account to pay for your health care costs, but only Medicare-covered expenses count toward your deductible. The amount deposited is usually less than your deductible amount so you generally will have to pay out-of-pocket before your coverage begins.

Medicare Part A (Hospital Insurance)

Part A covers inpatient hospital stays, care in a skilled nursing facility, hospice care, and some home health care.

Medicare Part B (Medical Insurance)

Part B covers certain doctors' services, outpatient care, medical supplies, and preventive services.

Medicare plan

Any way other than Original Medicare that you can get your Medicare health or prescription drug coverage. This term includes all Medicare health plans and Medicare Prescription Drug Plans.

Medicare Preferred Provider Organization (PPO) Plan

A type of Medicare Advantage Plan (Part C) available in some areas of the country in which you pay less if you use doctors, hospitals, and other health care providers that belong to the plan's network. You can use doctors, hospitals, and providers outside of the network for an additional cost.

Medicare prescription drug coverage (Part D)

Optional benefits for prescription drugs available to all people with Medicare for an additional charge. This coverage is offered by insurance companies and other private companies approved by Medicare.

Medicare Prescription Drug Plan (Part D)

Part D adds prescription drug coverage to Original Medicare, some Medicare Cost Plans, some Medicare Private-Fee-for-Service Plans, and Medicare Medical Savings Account Plans. These plans are offered by insurance companies and other private companies approved by Medicare. Medicare Advantage Plans may also offer prescription drug coverage that follows the same rules as Medicare Prescription Drug Plans.

Medicare Private Fee-For-Service (PFFS) Plan

A type of Medicare Advantage Plan (Part C) in which you can generally go to any doctor or hospital you could go to if you had Original Medicare, if the doctor or hospital agrees to treat you. The plan determines how much it will pay doctors and hospitals, and how much you must pay when you get care. A Private Fee-For-Service Plan is very different than Original Medicare, and you must follow the plan rules carefully when you go for health care services. When you're in a Private Fee-For-Service Plan, you may pay more or less for Medicare-covered benefits than in Original Medicare.

Medicare Savings Program

A Medicaid program that helps people with limited income and resources pay some or all of their Medicare premiums, deductibles, and coinsurance.

Medicare SELECT

A type of Medigap policy that may require you to use hospitals and, in some cases, doctors within its network to be eligible for full benefits.

Medicare Special Needs Plan (SNP)

A special type of Medicare Advantage Plan (Part C) that provides more focused and specialized health care for specific groups of people, like those who have both Medicare and Medicaid, who live in a nursing home, or have certain chronic medical conditions.

Medicare Summary Notice (MSN)

A notice you get after the doctor, other health care provider, or supplier files a claim for Part A or Part B services in Original Medicare. It explains what the doctor, other health care provider, or supplier billed for, the Medicare-approved amount, how much Medicare paid, and what you must pay.

Medigap basic benefits

Benefits that all Medigap policies must cover, including Part A and Part B coinsurance amounts, blood, and additional hospital benefits not covered by Original Medicare.

Medigap Open Enrollment Period

A one-time-only, 6-month period when federal law allows you to buy any Medigap policy you want that's sold in your state. It starts in the first month that you're covered under Part B and you're age 65 or older. During this period, you can't be denied a Medigap policy or charged more due to past or present health problems. Some states may have additional open enrollment rights under state law.

Medigap policy

Medicare Supplement Insurance sold by private insurance companies to fill "gaps" in Original Medicare coverage.

Multi-employer plan

In general, a group health plan that's sponsored jointly by 2 or more employers.


Top of page

Note

This glossary explains terms in the Medicare program, but it isn't a legal document. The official Medicare program provisions are found in the relevant laws, regulations, and rulings.