Understanding Medicare
A Beginner’s Guide
Updated: September 2026
Written by: Golden Living Today Editorial Team
Sources reviewed: September 2026
Medicare is a federal health insurance program that helps millions of Americans access healthcare coverage. Most people become eligible at age 65, although some people qualify earlier because of a disability, End-Stage Renal Disease (ESRD), or ALS.
🏛️ Government Benefits Disclaimer: Golden Living Today is an independent informational website and is not affiliated with, endorsed by, or sponsored by the Social Security Administration, Medicare, Medicaid, or any other government agency. Program rules, eligibility requirements, benefits, and costs may change. Always verify current information through the appropriate official government agency.
In This Article…
• Original Medicare vs. Medicare Advantage
Understanding the different parts of Medicare, enrollment periods, and coverage options can feel confusing. This beginner’s guide explains the basics so individuals and families can better understand their choices and make informed healthcare decisions.
Medicare at a Glance
| Part | What it generally covers |
|---|---|
| Part A | Hospital and inpatient care |
| Part B | Doctors, outpatient care and preventive services |
| Part C | Medicare Advantage — an alternative way to receive Medicare coverage |
| Part D | Prescription drug coverage |
| Medigap | Supplemental insurance that can help with certain Original Medicare out-of-pocket costs |
ℹ️ Important Note: Medicare coverage, costs, and enrollment rules can change. Your choices may also depend on your individual circumstances. Always verify current information through Medicare.gov, Social Security, or a qualified SHIP counselor.
What Is Medicare?
Medicare is a federal health insurance program primarily for people age 65 and older. Some people qualify earlier because of a disability, End-Stage Renal Disease (ESRD), or ALS (also called Lou Gehrig’s disease).
Medicare helps cover many healthcare services, including hospital care, doctor visits, outpatient services, preventive care, and prescription drugs, depending on the type of coverage you choose. Understanding the different parts of Medicare is important because each part serves a different purpose.
Medicare Part A
Medicare Part A is often called hospital insurance. It helps cover inpatient hospital care, limited skilled nursing facility care when Medicare requirements are met, hospice care, and some home health care.
Most people do not pay a monthly premium for Part A because they or a spouse paid Medicare taxes long enough while working. However, deductibles, coinsurance, and other costs may still apply.
It is important to remember that Part A coverage for skilled nursing care is different from long-term custodial nursing home care, which Medicare generally does not cover.
Medicare Part B
Medicare Part B is medical insurance. It helps cover services from doctors and other healthcare providers, outpatient care, durable medical equipment, some home health care, and many preventive services.
Unlike premium-free Part A, most beneficiaries pay a monthly premium for Part B. Part B also covers many preventive screenings and a yearly Medicare “Wellness” visit when eligibility requirements are met.
Medicare Part C (Medicare Advantage)
Medicare Advantage, also called Medicare Part C, is an alternative to Original Medicare. These plans are offered by private insurance companies approved by Medicare.
You must have Medicare Part A and Part B to join a Medicare Advantage plan, and you generally continue paying your Part B premium. Medicare Advantage plans must cover the medically necessary services that Original Medicare covers, and most include prescription drug coverage.
Some plans also offer additional benefits such as dental, vision, hearing, or fitness benefits. Costs, provider networks, prescription coverage, and rules such as prior authorization can vary by plan, so it is important to compare plans carefully.
Medicare Part D
Medicare Part D helps cover the cost of prescription drugs. Part D coverage is offered by private insurance companies that contract with Medicare. You can get drug coverage through a separate Medicare drug plan or through many Medicare Advantage plans that include prescription coverage.
Premiums, deductibles, pharmacies, and lists of covered medications can vary by plan. Because plans can change from year to year, it is a good idea to review your drug coverage during Medicare Open Enrollment each fall.
2026 Update: For 2026, annual out-of-pocket spending for Part D-covered prescription drugs is capped at $2,100. Once a person reaches that limit, they pay nothing for covered Part D drugs for the rest of the calendar year.
Original Medicare vs. Medicare Advantage
Once you have Medicare Part A and Part B, there are two main ways to receive your Medicare health coverage:
Original Medicare includes Part A and Part B. You can choose to add a separate Part D prescription drug plan and may also purchase Medicare Supplement Insurance, commonly called Medigap, to help with certain out-of-pocket costs.
Medicare Advantage (Part C) is offered by Medicare-approved private insurance companies as an alternative to Original Medicare. Most Medicare Advantage plans include prescription drug coverage, and some offer additional benefits such as dental, vision, or hearing coverage.
The best choice depends on factors such as your doctors, prescriptions, healthcare needs, travel, costs, and whether you are comfortable using a plan’s provider network. Compare coverage carefully before making a decision.
What Is Medigap?
Medicare Supplement Insurance, commonly called Medigap, is private insurance designed to help pay some of the out-of-pocket costs that remain after Original Medicare pays its share, such as certain copayments, coinsurance, and deductibles.
Medigap works with Original Medicare, not Medicare Advantage. You generally must have Medicare Part A and Part B to purchase a Medigap policy.
Medigap enrollment rules can be important. The federal Medigap Open Enrollment Period generally lasts six months beginning the first month you are both age 65 or older and enrolled in Medicare Part B.
What Original Medicare Generally Does Not Cover
Original Medicare provides broad healthcare coverage, but it does not pay for every healthcare or long-term care expense. Knowing about common coverage gaps can help you plan ahead and avoid surprises.
Original Medicare generally does not cover:
• Long-term custodial care, including extended nursing home care when skilled medical care is not required
• Room, board, and personal care costs associated with assisted living
• Most routine dental care and dentures
• Routine eye exams for prescription eyeglasses or contact lenses
• Hearing aids and exams for fitting hearing aids
• Most cosmetic surgery
• Most healthcare received outside the United States
• Routine physical exams
• Homemaker or personal care services when skilled medical care is not also needed
There are exceptions. For example, Original Medicare may cover certain medically necessary dental, vision, or hearing-related services under specific circumstances.
Medicare also does not generally pay for long-term custodial care simply because someone can no longer live independently. Medicare may cover limited skilled nursing facility or home health services when specific eligibility requirements are met.
Some people use Medigap, Medicare Advantage, Medicaid, employer or retiree coverage, or other resources to help with expenses that Original Medicare does not cover.
Enrollment Basics
Medicare enrollment rules depend on your individual situation. Some people are enrolled automatically, while others need to sign up.
For most people becoming eligible at age 65, the Initial Enrollment Period lasts seven months:
• Three months before the month you turn 65
• The month you turn 65
• Three months after the month you turn 65
When your coverage begins depends on when you enroll.
If You Are Still Working at 65
Some people with qualifying employer group health coverage may be able to delay Part B without a late-enrollment penalty. However, the rules depend on the type of coverage you have, so it is important to check with Social Security or Medicare before delaying enrollment.
Important: COBRA and retiree health coverage generally do not count as coverage based on current employment for purposes of delaying Part B. If your employment ends, your eight-month Special Enrollment Period may begin even if you elect COBRA.
Special Enrollment Period
People who delayed Part B because they had qualifying coverage through current employment may generally have a Special Enrollment Period while still covered or for up to eight months after the employment or qualifying group health coverage ends.
General Enrollment Period
If you missed your Initial Enrollment Period and do not qualify for a Special Enrollment Period, you may be able to enroll in Part B during the General Enrollment Period from January 1 through March 31 each year. Coverage generally begins the month after you sign up.
Medicare Open Enrollment
Medicare’s annual Open Enrollment Period runs from October 15 through December 7. During this period, people who already have Medicare can review and change Medicare Advantage or prescription drug coverage for the following year.
Medicare Advantage Open Enrollment Period
If you are already enrolled in a Medicare Advantage plan, the Medicare Advantage Open Enrollment Period runs from January 1 through March 31 each year. During this period, you can make one change by switching to another Medicare Advantage plan or returning to Original Medicare. If you return to Original Medicare, you may also be able to join a separate Medicare drug plan.
Why Timely Enrollment Matters
Delaying Medicare enrollment without qualifying coverage can result in gaps in healthcare coverage and late-enrollment penalties. Some penalties may continue for as long as you have that Medicare coverage.
Because individual circumstances vary, begin reviewing your Medicare options several months before you turn 65 or before existing employer coverage ends.
Where to Get Help
Navigating Medicare can be confusing, but help is available. Several trusted organizations offer free information and counseling to help seniors understand their options.
State Health Insurance Assistance Program (SHIP)
SHIP provides free, unbiased Medicare counseling. Trained counselors can answer questions about enrollment, coverage options, costs, and Medicare Advantage plans. Free Medicare counseling and plan assistance.
Social Security Administration
The Social Security Administration handles Medicare enrollment and can assist with applications and eligibility questions.
Medicare
The official Medicare program offers educational materials, plan comparisons, and customer support for beneficiaries and caregivers. Compare plans, review coverage, and find official Medicare information.
Area Agencies on Aging (AAA)
Area Agencies on Aging connect older adults and caregivers with local services, benefits counseling, transportation, nutrition programs, caregiver resources, and other community support.
Senior Centers and Community Organizations
Many local senior centers host educational workshops and Medicare information sessions throughout the year.
Trusted Family Members and Caregivers
When making healthcare decisions, consider involving trusted family members or caregivers who can help review options and ask questions.
🌿Remember: you do not have to navigate Medicare alone. Reliable assistance is available to help you make informed decisions about your healthcare coverage.
Need One-on-One Medicare Assistance?
Contact your local State Health Insurance Assistance Program (SHIP) for free, unbiased Medicare counseling. A SHIP counselor can help explain enrollment, coverage choices, prescription drug plans, Medicare Advantage, and other Medicare questions.
🌿 Golden Moment
You don’t have to understand Medicare all at once. Every question you ask and every decision you make today helps build a healthier, more confident tomorrow.
Related Articles
Looking for more information about Medicare, healthcare, and senior living?
These articles may help:
• Understanding Medicaid: A Beginner’s Guide
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• Caregiver Tips and Resources
Find practical guidance for supporting a loved one while also caring for your own health and well-being.
• Choosing the Right Senior Living Option
Explore different senior living choices and factors to consider when additional support or care may be needed.
📚 Sources & Further Reading
• Medicare.gov — Get Started with Medicare
• Medicare.gov — Parts of Medicare
• Medicare.gov — What Original Medicare Does Not Cover
• Medicare.gov — When Does Medicare Coverage Start?
• Medicare.gov — Medicare Open Enrollment
• State Health Insurance Assistance Program (SHIP) — Medicare Counseling