For most workers, retirement means an end to employer-sponsored health coverage. But your 65th birthday usually comes with a new type of health insurance: Medicare. But how does Medicare work, anyway? Whether you’re about to turn 65 or you’ve...

For most workers, retirement means an end to employer-sponsored health coverage. But your 65th birthday usually comes with a new type of health insurance: Medicare.

But how does Medicare work, anyway?

Whether you’re about to turn 65 or you’ve been enrolled in Medicare for years, now is a great time to brush up on the federal health insurance program, what it offers, what it costs and how to make changes to your coverage.

7 Frequently Asked Questions About Medicare

Medicare is the largest health insurance program in the United States, covering more than 60 million Americans.

It’s also one of the most confusing and complex programs.

Contrary to popular belief, Medicare isn’t free and it doesn’t cover all your health care costs, either.

Here’s what you need to know to get the most out of your Medicare coverage.

1. What Is Medicare?

Medicare is the federal government’s health program for people age 65 and older, as well as some younger people with disabilities or kidney failure.

If you’re at least 65 years old and entitled to Social Security benefits or Railroad Retirement benefits, you’re eligible for Medicare. You don’t need to be retired or taking benefits to qualify.

Younger people who have been on Social Security Disability for at least 24 months or diagnosed with end-stage renal disease or ALS are also eligible.

2. How Is Medicare Funded?

Payroll taxes, general revenue and beneficiary premiums are the three main funding sources for Medicare.

The program, which spent $888 billion on care in 2021, also draws money from taxes on Social Security benefits, payments from states and interest.

Medicare Part A — which mostly covers hospital visits and hospice care — is funded via payroll taxes.

Also known as FICA, these taxes are automatically withheld by your employer.

FICA taxes include a 6.2% Social Security tax and a 1.45% Medicare tax on your earnings  — or 7.65% total.

Medicare Part B — which covers outpatient care, doctor visits and medical equipment — is funded through a combination of general revenues (73% in 2021) and beneficiary premiums (25%), according to the Kaiser Family Foundation.

3. How Does Medicare Work and What Are the Different Parts?

Original Medicare, also known as traditional Medicare, includes Part A and Part B. Original Medicare covers hospital stays, doctor visits, durable medical equipment, home health care and other medical services.

However, it doesn’t cover vision, dental, hearing or prescriptions.

Medicare Part D is optional prescription drug coverage, and serves as a supplement to Original Medicare.

Medicare Part C, better known as Medicare Advantage, is an alternative to Original Medicare. It’s provided by federally approved private insurance companies and bundles features of Part A, Part B and usually Part D drug coverage into a single plan.

You can have other insurance — such as Medicaid or employer coverage — and Medicare at the same time. In this situation, Medicare pays first and your other insurance is the secondary payer.

Part A: Hospital Coverage

Medicare Part A is basically hospital insurance. It’s premium-free for most Medicare beneficiaries because you paid into it during your working years via those Medicare taxes.

However, Part A isn’t completely free. You still have Part A deductibles and coinsurance costs.

Medicare Part A covers:

In-patient hospital care Skilled nursing facility care Home health care Hospice

2023 Medicare Part A costs include:

$0 monthly premiums for most people. A deductible of $1,600 per benefit period. (This is how much you pay out-of-pocket before Medicare picks up the rest of the bill). $0 for the first 60 days in a hospital. Then $400 per day for days 61 through 90. After day 90, you can dip into a reserve of 60 days that you get over your lifetime, but you’ll pay $800 a day. Once you run out of lifetime reserve days, you’re responsible for the full cost. $0 for the first 20 days in a skilled nursing facility following a hospitalization. Then ??$200 per day for days 21 through 100. Beyond day 100, you pay all the costs. $0 for hospice care and related services.

A note about benefit periods: The clock for a benefit period begins when you’re admitted to the hospital or a skilled nursing facility as an in-patient. It ends once you haven’t had any in-patient care for 60 days.

So if you had a 75-day hospitalization, you’d pay a $1,600 deductible, plus coinsurance of $6,000 (for days 61 through 75 at $400 per day).

If you were hospitalized again six months later, you’d start a new benefit period. You’d owe another $1,600 deductible. So it’s possible to owe the Part A deductible multiple times in one calendar year if you’re hospitalized multiple times.

However, so long as you didn’t remain hospitalized for more than 60 days during your second visit, you wouldn’t have any coinsurance costs.

Some beneficiaries purchase Medicare supplement insurance policies, better known as Medigap, that help cover Part A deductibles and some other costs.

Part B: Medical Coverage

Medicare Part B covers you for doctor’s services and outpatient care:

Medicare Part B covers:

Doctor visits (including telehealth) Lab work Diagnostic tests and preventative care Mental health coverage Physical therapy Chemotherapy Durable medical equipment Outpatient surgeries Ambulance services

Unlike Medicare Part A premiums, your Part B premiums aren’t free.

Some people who are still working and covered by employer medical insurance or are covered under their spouse’s health insurance plan opt to postpone Medicare Part B coverage until their other coverage ends.

2022 Medicare Part B costs include:

Monthly premium of $164.90. This amount is higher for single filers with an income above $97,000, and married couples with an income above $194,000. People with limited incomes may qualify for Medicaid or a Medicare Savings Program that helps cover this cost. A $226 annual deductible. 20% coinsurance for Medicare Part B services after your deductible is paid. $0 for most preventive services.

If you receive Social Security, your Medicare Part B premiums are automatically deducted from your benefit each month.

Part D: Drug Coverage

Medicare Part D is an optional prescription drug coverage program for people enrolled in Original Medicare. This coverage is provided by a private insurance company that Medicare later reimburses.

All Medicare prescription drug plans are required to cover certain categories of prescription drugs, but plans can vary widely in terms of what specific drugs they cover. Thus, your prescription drug costs can vary, depending on the Medicare Part D you choose.

You can shop for a Part D plan by using the Medicare Plan Finder tool.

Your Medicare Part D costs will depend on your income, your prescription drugs, the plan you select and the pharmacies you use.

Premiums: Vary by plan. The Centers for Medicare & Medicaid Services (CMS) estimates the average premium for basic Part D coverage is $31.50 a month in 2023. Deductible: Most Part D prescription drug plans charge a deductible. The Part D deductible is capped at $505. Income: High income earners — single filers making more than $97,000 or joint filers making $194,000 or more — pay an additional monthly surcharge of ??$12.20 to $76.40 a month.

Medicare Advantage Plans (Part C)

Medicare Part C, better known as Medicare Advantage, is an all-in-one alternative to Original Medicare.

You can buy a Medicare Advantage plan offered by a Medicare-approved private insurance company.

Most Medicare Advantage plans bundle in Part D prescription drug coverage, allowing you to get all your Medicare benefits in a single plan. Many include additional benefits Original Medicare doesn’t cover, like hearing, dental and vision coverage.

Think of Medicare Advantage like this:

Part C = Part A + Part B + Part D (usually) + some extra services

Medicare Part C covers:

All the services covered by Original Medicare, including emergency and urgent medical care. Vision, hearing and dental (usually). Prescription drugs (usually).

2023 Medicare Part C costs include:

Deductibles and coinsurance, which vary from plan to plan. You may pay a premium for your Medicare Advantage plan in addition to your monthly Part B premium. Some plans have a $0 premium or may help pay some of your Part B premiums.

Unlike Original Medicare, Medicare Advantage plans restrict you to health care providers and services within the plan’s local network. You may also need to get prior authorization and approval from your plan for certain services and supplies.

Medigap (Medicare Supplement Insurance)

Medigap policies help cover some out-of-pocket costs, such as deductibles and coinsurance, for Original Medicare beneficiaries.

You can only purchase a Medigap policy if you’re enrolled in Original Medicare. Medicare Advantage enrollees can’t buy these supplement insurance policies.

Medicare supplement insurance plans are sold by private insurance companies. You’ll pay an insurer a monthly premium for your Medigap coverage in addition to all your other Medicare costs.

4. What Doesn’t Medicare Cover?

There are several major medical expenses that aren’t covered by Medicare Part A or Part B.

But remember: You can get some of these services covered if you add a Part D plan or switch to a Medicare Advantage plan.

Long-term care: No part of Medicare — including Medicare Advantage plans — covers extended nursing home or assisted living facility stays. Medicare coverage for nursing care is mostly limited to short-term rehabilitative stays. Medicaid — which assists people with low income, regardless of age — can pick up the tab for long-term care, but only after you’ve depleted your financial resources. Prescription drugs: Part D coverage is necessary. Dental: Original Medicare doesn’t cover routine dental care, including cleanings, fillings, tooth extractions and dentures, but Part A may cover emergency dental work you incur during a hospital stay. Vision: Original Medicare won’t pay for eye exams, glasses or contact lenses. Hearing aids: Original Medicare doesn’t pay for hearing aids or exams for fitting hearing aids.

Other services not covered by Medicare:

Most cosmetic surgery Sterilization, including a hysterectomy (unless it’s considered medically necessary) Medical marijuana Massage therapy Health care outside the United States

5. How Do I Sign Up for Medicare?

If you’re already receiving Social Security benefits, you’ll be automatically enrolled in Medicare. You don’t have to do anything.

Otherwise, you’ll need to sign up for Medicare around your 65th birthday, and you have a seven-month window to enroll.

This initial enrollment period begins three months before your birthday month, includes your birthday month and extends three months after that.

So if you were born on Jan. 5, you could sign up between Oct. 1 and April 30.

You can also sign up during Medicare’s general enrollment period between Jan. 1 and March 31 if you missed the seven-month window around your 65th birthday. But your benefits won’t start until July of that year.

The Medicare enrollment process is handled by the Social Security Administration. If you’re not automatically enrolled, you can sign up for Medicare by visiting Social Security’s website, calling 800-772-1213 or visiting your local Social Security office.

You can enroll in Medicare even if you don’t plan to retire right when you turn 65.

6. What Is Open Enrollment?

Medicare open enrollment, also known as the annual election period, runs from Oct. 15 through Dec. 7 each year.

It’s the time when people who are already enrolled in Medicare can make changes to their plans.

If you’re happy with your coverage, you don’t need to do anything.

During open enrollment, you can:

Switch from Original Medicare to Medicare Advantage, or vice versa. Switch to a different Medicare Advantage plan. Sign up for Part D if you didn’t enroll when you first became eligible. Change to a different Part D plan.

Whatever changes you make won’t go into effect until Jan. 1. So if you make changes during the 2022 open enrollment period, your new benefits will kick in January 2023.

7. Is Signing Up for Medicare Mandatory?

In some cases, yes.

If you have coverage under the Affordable Care Act, COBRA through a past employer or TRICARE for retired military members, you’re required to enroll in Medicare when you turn 65.

You may not have to sign up for Medicare right away if you’re still working and enrolled in your employer’s group health plan coverage or if your spouse is still working and you’re covered under their plan.

But be sure to check with your employer. Some companies will require you to enroll in Part A and Part B and use your employer insurance as secondary coverage.

Be sure you’re very clear on the rules. The penalties for late enrollment are steep and, in some cases, can increase your Medicare costs for the rest of your life.

Robin Hartill is a certified financial planner and a senior writer at The Penny Hoarder. Send your tricky money questions to AskPenny@thepennyhoarder.com or chat with her in The Penny Hoarder Community.

Rachel Christian is a Certified Educator in Personal Finance and a senior writer for The Penny Hoarder.

This was originally published on The Penny Hoarder, which helps millions of readers worldwide earn and save money by sharing unique job opportunities, personal stories, freebies and more. The Inc. 5000 ranked The Penny Hoarder as the fastest-growing private media company in the U.S. in 2017.

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