Medicare Glossary: Simple Definitions & Terms

The percentage of costs you pay for a covered health care service after you have paid your deductible. For example, under Original Medicare Part B, you pay 20% of the Medicare-approved amount for most doctor services.

Choosing Medicare coverage becomes easier when you stop looking for a universally better plan and start asking what fits your life. Your doctors, prescriptions, travel habits, and comfort with unexpected bills all matter.

A plan that works well for your neighbor may create difficulties for you. Perhaps you see specialists across different health systems. Perhaps keeping monthly expenses manageable matters most. Neither priority is wrong.

Understanding Medicare Advantage vs Medigap means looking beyond advertisements and comparing how each approach works when you actually need care.

Understand What You Are Comparing

Medicare Advantage and Medigap serve different purposes.

Medicare Advantage is a way to receive your Medicare benefits through a private insurance plan. You remain in Medicare, but the plan administers your covered hospital and medical benefits. Most plans also include prescription drug coverage.

Medigap, also called Medicare Supplement Insurance, works alongside Original Medicare. It helps pay certain expenses left after Medicare pays, depending on the policy.

You cannot use Medigap to pay Medicare Advantage copayments or deductibles. The meaningful comparison is Medicare Advantage versus Original Medicare with Medigap and, when needed, separate drug coverage. Medicare explains this distinction in its Medigap basics.

Compare Your Total Costs

A monthly premium is only part of your healthcare budget.

With Medicare Advantage, review the plan premium alongside copayments, coinsurance, deductibles, and its annual limit for covered medical services. You generally continue paying your Part B premium.

That medical spending limit does not include every expense. Premiums, prescription costs, and services outside the plan’s coverage need separate consideration.

With Medigap, you pay a policy premium in addition to applicable Medicare and drug plan premiums. Depending on the policy, more of your expenses for Medicare covered services may be handled by your supplement.

Ask yourself: would you prefer paying more regularly for greater predictability, or accepting more costs when you receive care?

Compare a routine year with a year involving hospital treatment and ongoing specialist appointments. Medicare’s coverage comparison outlines the financial differences.

Check Access to Your Doctors

Start with the people already involved in your care.

Original Medicare generally lets you visit doctors and hospitals that accept Medicare throughout the country. Most standard Medigap policies follow that access, although Medicare SELECT policies have additional network requirements.

Medicare Advantage plans may require you to use a provider network for routine care. Some allow care outside the network at a different cost.

Ask your doctor’s office about the exact plan you are considering. Accepting Medicare does not necessarily mean participating in a particular Medicare Advantage plan.

Confirm your hospital, specialists, laboratories, and treatment facilities too. A familiar insurance company name is not enough to establish that your care team participates.

Understand Referrals and Approval Requirements

Doctor access and permission for a service are separate questions.

Some Medicare Advantage plans require specialist referrals. Plans may also require prior authorization before covering certain treatments, equipment, or services.

Original Medicare generally has fewer prior authorization requirements, but coverage rules still apply. Having Medigap does not turn a service Medicare excludes into a covered benefit.

If you receive ongoing treatment, ask how the proposed coverage handles it. Discuss therapy, imaging, medical equipment, and specialist procedures before enrolling.

The practical question is not simply whether something is covered. It is what must happen before you can receive covered care.

Review Prescriptions and Additional Benefits

Most Medicare Advantage plans include prescription coverage. Compare your medications against the plan’s covered drug list, and check pharmacy arrangements and restrictions.

Medigap policies sold today do not include prescription drug coverage. People using Original Medicare with Medigap generally consider a separate Part D plan unless they have other suitable drug coverage.

Some Medicare Advantage plans include dental, vision, hearing, or fitness benefits. Review their limits and participating providers before assigning them much value.

Medigap generally does not cover routine dental care, eyeglasses, or hearing aids. Its central purpose is helping with eligible Medicare expenses. See Medicare’s explanation of what Medigap covers.

Consider Where You Spend Your Time

Travel can change which coverage feels practical.

If you regularly stay with family elsewhere in the country, broad access through Original Medicare may be useful. With Medicare Advantage, check how the specific plan handles routine care while you are away.

Emergency coverage is different from access to scheduled appointments outside your usual area.

For international travel, neither approach should be assumed to provide comprehensive protection. Some Medigap policies include limited foreign travel emergency benefits, and some Medicare Advantage plans offer travel benefits. Read the conditions before relying on them.

Think About Switching Before You Enroll

Do not choose coverage assuming you can always move into Medigap later without questions.

Medigap has a protected enrollment opportunity linked to age and Part B enrollment. Outside that window, insurers may use medical underwriting unless another protection applies.

State rules and certain circumstances can provide additional rights. However, permission to leave Medicare Advantage does not automatically guarantee acceptance into Medigap.

Before making a switch, confirm your eligibility, application outcome, prescription arrangements, and effective dates. Medicare’s Medigap buying guidance explains these protections.

Frequently Asked Questions

Is Medicare Advantage always cheaper?

No. Compare premiums with expected treatment costs, prescription expenses, and possible spending during a difficult health year. The answer depends on the specific coverage and your needs.

Does Medigap cover everything?

No. Benefits depend on the policy, and expenses for services Medicare does not cover generally remain your responsibility.

Can I have Medicare Advantage and Medigap together?

Medigap cannot supplement Medicare Advantage. Choose the coverage approach that fits your situation rather than treating them as complementary policies.

Which option is better for frequent specialist visits?

Check the specialists you need, referral rules, treatment approvals, and expected costs. Frequent visits alone do not determine the best choice.

Choose With Your Own Priorities in Mind

The better option supports your care, fits your budget, and leaves you comfortable with its rules.

Prepare your doctor and medication lists, identify your priorities, and find a Medicare agent through Find My Medicare Agent. An independent professional can help you compare available options and understand the tradeoffs before you decide.

The process of leaving a Medicare Advantage or Part D plan. You can only disenroll during specific enrollment periods, such as the Annual Enrollment Period or a Special Enrollment Period. When you disenroll from a Medicare Advantage plan, you return to Original Medicare.

Many older adults eventually need some support at home, whether that means preparing meals, doing laundry, shopping for groceries, bathing safely, or simply having someone nearby for assistance. Because Medicare provides health coverage for seniors, it is understandable to assume that it may also pay for this type of household or personal support. However, Medicare generally covers home-based services only when they are medically necessary and provided by qualified healthcare professionals. Understanding the difference between medical home healthcare and everyday personal assistance can help you avoid unexpected expenses and explore other available options. Home Services Medicare May Cover Medicare may pay for certain services delivered in your home when they are prescribed by a doctor and connected to a medical condition, illness, injury, or recovery. Covered services may include: Skilled nursing visits provided by a licensed nurse Wound care, injections, and medication-related support Physical therapy after surgery, illness, or injury Occupational therapy to help restore daily functioning Speech-language therapy Limited skilled nursing care following a hospital stay Medical social services in qualifying situations These services are considered skilled healthcare because they require the knowledge and supervision of trained medical professionals. Depending on the circumstances, eligible services may be covered through Medicare Part A or Medicare Part B. Coverage requirements can include being under a doctor’s care, needing part-time skilled services, and using a Medicare-certified home health provider. The Difference Between Skilled Care and Daily Living Assistance One of the most important distinctions in Medicare is the difference between skilled care and custodial care. Skilled care addresses a medical need and must be performed by a licensed healthcare provider. Custodial care focuses on helping someone complete routine activities that do not normally require medical training. Medicare usually does not pay for assistance such as: Cooking meals Cleaning the home Washing clothes Grocery shopping Running errands Help with bathing or dressing Assistance with using the bathroom General supervision Social companionship Routine safety monitoring These services may be very important for a person’s comfort, safety, and independence. However, Medicare typically does not classify them as medical treatment. Personal care may sometimes be included for a limited period when it is provided alongside qualifying skilled home health services. It is generally not covered when household or personal assistance is the only service needed. Can Medicare Advantage Offer Additional Home Support? Some Medicare Advantage plans may provide supplemental benefits that are not included in Original Medicare. Depending on the plan and the member’s eligibility, these additional benefits may include: Limited light housekeeping Short-term meal delivery Transportation to approved appointments Home safety assessments Grab bars or other safety modifications Personal support following a hospital stay Assistance designed to reduce the risk of readmission These benefits are not available through every Medicare Advantage plan. The amount of support, eligibility rules, service limits, and approved providers can vary considerably. Some benefits may only be available to members with specific chronic conditions or medical needs. Others may be restricted to a limited number of hours or visits. Before enrolling, review the plan’s Evidence of Coverage or speak with a licensed Medicare professional to confirm exactly what is included. Why Medicare Limits Household Assistance Medicare was primarily created to cover medical treatment rather than ongoing help with ordinary daily activities. As a result, Medicare focuses on services intended to diagnose, treat, or manage a health condition. Long-term assistance with cooking, cleaning, dressing, or supervision generally falls outside that purpose. This does not mean daily support is unimportant. It simply means that another program, insurance product, or community service may be responsible for providing or funding it. Other Ways to Find In-Home Assistance When someone needs regular non-medical support, it may be helpful to explore resources outside Original Medicare. Medicare Advantage Supplemental Benefits Review Medicare Advantage plans available in your area to determine whether any include in-home assistance, meal support, transportation, or safety benefits. Medicaid Programs People who meet their state’s financial and medical eligibility requirements may qualify for Medicaid-funded home and community-based services. These programs may provide personal care or other assistance that Medicare does not normally cover. Long-Term Care Insurance A long-term care insurance policy may help pay for custodial care, personal assistance, assisted living, or extended home support, depending on the policy terms. Local Aging and Community Organizations Area Agencies on Aging, county programs, nonprofit groups, and community organisations may offer: Meal delivery Transportation Caregiver support Home safety assistance Companion programs Low-cost household help Benefits counselling Availability and eligibility differ by location, so contacting local senior-service organisations can be a useful starting point. Private In-Home Care Providers Families may also hire a home care agency or independent caregiver directly. This is usually paid privately unless another insurance policy or assistance program applies. Questions to Ask Before Selecting a Plan When comparing Medicare Advantage plans or discussing home support with an agent, consider asking: Does the plan include any in-home support benefits? What services are covered? How many hours or visits are provided? Who qualifies for the benefit? Is a doctor’s referral required? Must I use an approved service provider? Is the benefit temporary or available throughout the year? Are meals, transportation, or home modifications included? Will I have any copayments or additional costs? Getting these details in writing can help prevent confusion after enrollment. Planning Ahead for Changing Care Needs A person who is fully independent today may need more assistance in the future. Health changes, reduced mobility, recovery from surgery, and caregiver availability can all affect the amount of help required at home. Planning ahead may involve: Reviewing Medicare coverage annually Comparing Medicare Advantage supplemental benefits Researching local senior programs Discussing caregiving responsibilities with family members Considering long-term care insurance before extensive care is needed Creating a budget for possible private home assistance Asking healthcare providers about medically necessary home health services Preparing early can make it easier to arrange appropriate care when circumstances change. Medicare may cover skilled medical services provided in the home, but it generally does not pay for ongoing cooking, cleaning, companionship, shopping, or other routine personal assistance. Certain Medicare Advantage plans may offer limited in-home benefits, and Medicaid, long-term care insurance, local community programs, or private care providers may provide additional options. The right solution often involves combining Medicare-covered healthcare with other support resources. Before making a decision, carefully review plan benefits and speak with a qualified professional who can help you understand the choices available in your area.

A payment model where health care providers are paid for each service, procedure, or test performed. Original Medicare (Parts A and B) is a fee-for-service program, meaning Medicare pays separately for each covered service.

See Medigap / Medicare Supplement Insurance. Coverage that helps pay the out-of-pocket costs (gaps) not covered by Original Medicare, such as deductibles, coinsurance, and copays.

An alternative to Original Medicare offered by private insurance companies approved by Medicare. These plans (also called Part C) must cover all services that Original Medicare covers but often include extra benefits like dental, vision, and hearing. Most plans include drug coverage.

A type of Medicare health plan, less common than Medicare Advantage, in which members can use plan providers for lower cost-sharing or go outside the network and have services covered under Original Medicare instead.

Private supplemental insurance that fills the "gaps" in Original Medicare coverage, such as deductibles, coinsurance, and copays. Policies are standardized and sold by letter (e.g., Plan G, Plan N). Medigap policies generally do not cover prescription drugs.

The doctors, hospitals, pharmacies, and other health care providers that have contracted with a health plan to provide services to members at negotiated rates. Medicare Advantage and Medigap SELECT plans have networks; Original Medicare does not.

For Medicare Advantage, the period from January 1–March 31 each year when enrolled MA beneficiaries can switch to a different MA plan or return to Original Medicare (with Part D if desired). Changes take effect the first of the following month.

The traditional fee-for-service Medicare program offered directly through the federal government, consisting of Part A (hospital insurance) and Part B (medical insurance). Under Original Medicare, you can go to any doctor or hospital that accepts Medicare.

The most you will have to pay for covered services in a plan year. After you reach this limit, your plan pays 100% of covered costs. Medicare Advantage plans must have an out-of-pocket maximum; Original Medicare does not have one.

A stand-alone Medicare Part D plan that provides prescription drug coverage for people enrolled in Original Medicare. PDPs are separate from Medicare Advantage plans that already include drug coverage.

Approval that your Medicare Advantage or Part D plan may require before you receive certain services or medications. Without prior authorization, the plan may not cover the cost. Original Medicare rarely requires prior authorization.

A written order from your primary care provider authorizing you to see a specialist or get certain health care services. HMO-type Medicare Advantage plans typically require referrals; PPOs and Original Medicare do not.

Choosing Medicare coverage can feel confusing, especially when you are hearing different recommendations from different people. A good Medicare agent can make the process easier, but the conversation should not be one sided. You should feel comfortable asking questions, comparing options, and understanding why a particular plan may or may not fit your situation.

Before you enroll, take some time to speak with an agent and ask the right questions. The answers can help you understand your choices and recognize whether the agent is focused on educating you or simply getting you enrolled.

Here are ten important questions to ask a Medicare agent before making your decision.

What type of Medicare agent are you?

Start by understanding who you are talking to.

Ask whether the agent is independent and which insurance carriers they represent. An independent agent may be able to compare plans from multiple carriers, while an agent connected to one insurance company may have a more limited selection.

The important thing is transparency. You should know what options the agent can actually show you before relying on their recommendation.

Are you licensed to serve people in my state?

Medicare plans and availability can vary by location. Ask the agent whether they are licensed in your state and whether they regularly work with people in your area.

A local understanding can be valuable because plan availability, provider networks, pharmacies, and other details can differ depending on where you live.

You can also ask how you can verify the agent's license. Find My Medicare Agent allows consumers to review licensed agent profiles and compare professionals serving their area.

Which Medicare options should I consider?

Do not assume that one type of Medicare coverage is automatically right for everyone.

Ask the agent to explain the differences between Original Medicare with supplemental coverage and Medicare Advantage. Medicare Advantage is offered by private insurance companies and generally combines Medicare hospital and medical coverage into a private plan. Original Medicare can be paired with a Medicare Supplement policy and prescription drug coverage.

The right conversation should focus on your doctors, prescriptions, budget, travel habits, and expectations for healthcare rather than simply recommending the plan with the lowest premium.

For a straightforward explanation, review the Find My Medicare Agent guide on Medicare Advantage versus Medigap before your conversation.

Are my doctors and hospitals covered?

This is one of the most important questions to ask before enrolling.

Give the agent a list of the doctors, specialists, hospitals, and other healthcare providers you want to continue using. Ask the agent to verify whether they participate in the plan being recommended.

This matters particularly with Medicare Advantage because many plans use provider networks. Original Medicare generally allows you to see doctors and hospitals that accept Medicare.

Do not rely only on a general statement such as “your doctor should be covered.” Ask for the specific provider to be checked.

Are my prescriptions covered?

Bring an up to date list of your medications when speaking with an agent.

Ask whether each prescription is covered, which plan covers it, and what cost sharing applies. Medicare prescription drug plans have formularies, and the medications covered can differ between plans.

If you take several prescriptions, this question becomes even more important. A plan that looks attractive at first may not be the best fit if your medications are not covered in the way you expect.

The Find My Medicare Agent Medicare Checklist also recommends gathering your medication list and prescribed dosages before reviewing coverage.

What will I actually pay?

Do not judge a Medicare plan by its monthly premium alone.

Ask the agent to explain the costs you could face when you use healthcare services. Depending on the type of coverage, this can include premiums, deductibles, copayments, coinsurance, prescription costs, and other out of pocket expenses.

Then ask a more useful question:

What could my healthcare costs look like if I need very little care compared with a year when I need a lot of care?

This encourages a broader discussion about how the plan works instead of focusing on one attractive number.

Medicare itself recommends comparing plan costs, services, prescriptions, providers, and estimated yearly drug costs when evaluating coverage.

Do I need referrals or prior authorization?

If you are considering Medicare Advantage, ask whether the plan requires referrals for specialists or prior authorization for certain services.

These rules can affect how you access care. Medicare notes that some Medicare Advantage plans may require referrals and prior authorization, while Original Medicare generally has fewer such requirements.

Ask the agent to explain which services may require approval and how the process works.

What happens if I travel or spend time in another state?

Your lifestyle matters when choosing Medicare coverage.

If you travel frequently, spend part of the year in another state, or expect to move, tell your agent. Ask how the plan handles healthcare outside your normal service area.

Some Medicare Advantage plans have network and service area restrictions, while Original Medicare generally offers broader provider access across the United States.

An agent should consider your travel habits before recommending coverage.

What enrollment period applies to me?

Do not leave enrollment timing until the last minute.

Ask the agent which enrollment period applies to your situation and what you need to do before the deadline. Your circumstances may be different if you are turning 65, still working, leaving employer coverage, moving, or experiencing another qualifying life event.

The Medicare enrollment rules can be different depending on your situation, so avoid relying on a generic answer. Medicare provides specific enrollment periods for joining or changing Medicare health and drug plans.

Find My Medicare Agent also provides a Medicare Enrollment Periods guide and a Turning 65 Timeline to help consumers understand the timing before speaking with an agent.

How are you compensated, and what support do you provide after enrollment?

It is reasonable to ask how the agent is compensated.

You should also ask what happens after you enroll. Will the agent remain available when you have questions? Can you contact them if you need help understanding your coverage? Do they review your plan when your circumstances change?

The best agent relationship should not feel like it ends the moment an application is submitted.

Find My Medicare Agent is built around helping consumers compare licensed independent professionals and contact the agent they choose directly. The directory itself does not sell Medicare insurance or earn commissions from enrollments.

What a good Medicare agent conversation should feel like

A good conversation should leave you feeling more informed, not more pressured.

The agent should be willing to explain both advantages and limitations. They should ask about your healthcare needs before recommending a plan. They should explain why a particular option may fit your situation and help you understand what you are giving up by choosing another option.

Be cautious if someone rushes you, avoids questions, focuses only on benefits, or discourages you from comparing alternatives.

You do not have to choose a plan simply because an agent recommends it.

Questions to ask a Medicare agent: quick checklist

Before your conversation, keep these questions handy:

• Are you independent?

• Are you licensed in my state?

• Which insurance carriers do you represent?

• Which Medicare options should I compare?

• Are my doctors and hospitals covered?

• Are my prescriptions covered?

• What will my total costs look like?

• Are referrals or prior authorization required?

• Will the plan work with my travel or living arrangements?

• What enrollment period applies to me, and what support will I receive after enrollment?

Having these questions ready can make your Medicare conversation much more productive.

Frequently Asked Questions

Do I have to use a Medicare agent to enroll?

No. You can enroll in Medicare without an agent. However, a licensed agent can help you understand and compare available plan options. Medicare also recommends using official resources and trusted agents or brokers when comparing plans.

Should I choose the Medicare plan with the lowest premium?

Not necessarily. The premium is only one part of the overall cost. Consider provider access, prescription coverage, deductibles, copayments, coinsurance, and potential out of pocket expenses before making a decision.

Should my Medicare agent check my medications?

Yes. If prescription coverage is important to you, provide an accurate medication list and ask the agent to check the plan formulary and applicable costs. Medicare recommends checking whether your prescriptions are covered before joining a plan.

Can I ask an agent to compare Medicare Advantage and Medigap?

Absolutely. These options work differently, so ask the agent to explain the advantages and limitations of each based on your personal situation.

How can I find a Medicare agent near me?

You can search Find My Medicare Agent by state, city, or ZIP code and review licensed agent profiles before deciding whom to contact. The directory is free for consumers, and you choose when and who to contact.