Medicare Basics: What You Need to Know Before Choosing Coverage
Medicare Basics: What You Need to Know Before Choosing Coverage
For many people, Medicare shows up quietly when a birthday approaches, a letter arrives in the mail, or a conversation you’ve been meaning to have but haven’t quite gotten to yet. Suddenly, you’re expected to understand a system with parts, letters, and rules that feel anything but intuitive.
If you’re feeling unsure about where to begin, you’re not alone. Medicare can be complex, but the basics don’t have to be overwhelming. Understanding how Medicare is structured is the first step toward making informed decisions about your healthcare, now, and in the future.
Let’s start at the beginning.
What Is Medicare, Really?
Medicare is a federal health insurance program administered by the Centers for Medicare & Medicaid Services (CMS). It primarily serves:
- Adults age 65 and older.
- Individuals under 65 with certain disabilities
- Individuals of any age with End-Stage Renal Disease (ESRD) or amyotrophic lateral sclerosis (ALS)
At its core, Medicare is designed to help cover medically necessary healthcare services. Although what’s covered depends on how your Medicare is structured.
Understanding the Different Parts of Medicare
Medicare is divided into four parts. Each plays a different role, and together they form the foundation of coverage.
Part A: Hospital Insurance
Medicare Part A generally covers:
- Inpatient hospital stays
- Skilled nursing facility care (under specific conditions)
- Hospice care
- Limited home health services
Most people do not pay a monthly premium for Part A if they or their spouse paid Medicare taxes while working.
Part B: Medical Insurance
Medicare Part B typically covers:
- Doctor visits
- Preventive services
- Outpatient care
- Durable medical equipment
Part B does involve a monthly premium and usually involves cost sharing, such as deductibles and coinsurance.
Part C: Medicare Advantage
Medicare Advantage, also called Part C, is offered through private insurance companies approved by Medicare. These plans must provide all Part A and Part B services and follow CMS guidelines.
We’ll explore Medicare Advantage in more detail in the next blog post in our five-part series.
Part D: Prescription Drug Coverage
Medicare Part D helps cover prescription medications and is offered through private plans approved by Medicare.
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When Does Medicare Eligibility Begin?
Most people become eligible for Medicare:
- When they turn 65
- After receiving Social Security Disability Insurance (SSDI) for 24 months
- Immediately if diagnosed with ESRD or ALS
Some individuals are automatically enrolled, while others need to actively sign up.
What If I’m Still Working?
If you’re still working at age 65 and have employer-sponsored health coverage, you may be able to delay certain parts of Medicare. Whether that makes sense depends on factors like employer size and the type of coverage you have.
Understanding how employer insurance and Medicare work together can help you avoid gaps in coverage or late enrollment penalties.
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What Medicare Covers and What It Doesn’t
Original Medicare (Parts A and B) covers many essential healthcare services. However, it does not typically cover:
- Routine dental care
- Vision exams
- Hearing aids
- Long-term custodial care
These coverage gaps often lead people to explore additional Medicare coverage options.
What’s Next?
Learning the basics of Medicare gives you a foundation but not all the answers. The next step for many people is understanding how Medicare Advantage works and how it fits within the Medicare program.
In our next blog post, we explain Medicare Advantage, how it works, and who it may be designed for.
Have questions or want more information?
If you’d like to learn more or have general questions about Medicare, you can call SECUR Health Plan at 1.833.76SECUR (1.833.767.3287). TTY callers can use 711. Our team is available to provide information and help answer questions.

