OFFICIAL 2026 EDUCATIONAL RESOURCE BY WALTER JOHNSON, LICENSED INSURANCE AGENT (CA #0J15814).

Medicare Parts A, B, C, and D Explained

A simple breakdown of how each part of Medicare works and what they cover

Written by Walter Johnson, Licensed Insurance Agent

This article is for educational purposes only and is not a solicitation for insurance

Medicare Parts A, B, C, and D explained in simple terms. Learn what each part covers, how they work together, and what you need.

Yes — Medicare is made up of four main parts, each covering different healthcare services.

Understanding how these parts work together is the foundation of making informed Medicare decisions.

Each part plays a specific role in your coverage, from hospital care to prescription drugs.

Start here: 👉 Medicare Basics

What Are the Four Parts of Medicare?

Medicare is divided into four parts:

Part A — Hospital Insurance
Part B — Medical Insurance
Part C — Medicare Advantage
Part D — Prescription Drug Coverage

Each part covers different types of healthcare services.

Medicare Part A (Hospital Insurance)

Part A covers inpatient care and facility-based services.

This includes:

Hospital stays
Skilled nursing facility care
Hospice care
Some home health services

Part A is typically premium-free if you’ve paid Medicare taxes while working.

Learn more: 👉 Does Medicare Cover Hospital Stays

Medicare Part B (Medical Insurance)

Part B covers outpatient and medical services.

This includes:

Doctor visits
Preventive services
Lab tests and imaging
Durable medical equipment

Part B requires a monthly premium and typically involves coinsurance.

Learn more: 👉 Does Medicare Cover Doctor Visits

Medicare Part C (Medicare Advantage)

Part C, also known as Medicare Advantage, is an alternative way to receive your Medicare benefits.

These plans are offered by private insurance companies and combine:

Part A and Part B coverage
Often Part D (drug coverage)
Additional benefits like dental, vision, and hearing

Coverage and costs vary by plan.

Learn more: 👉 How Medicare Advantage Plans Work

Medicare Part D (Prescription Drug Coverage)

Part D provides coverage for prescription medications.

These plans are also offered by private insurers and include a list of covered drugs called a formulary.

Part D helps reduce the cost of medications and protect against high drug expenses.

Learn more: 👉 Does Medicare Cover Prescription Drugs

How the Parts Work Together

You can combine different parts of Medicare depending on your needs.

Common setups include:

Original Medicare (Part A + Part B)
Original Medicare + Part D
Medicare Advantage (Part C) as an all-in-one alternative

Each option provides different levels of coverage and cost structures.

Do You Need All Four Parts?

Not everyone needs every part of Medicare.

Your choices depend on:

Your healthcare needs
Whether you take prescription drugs
Your budget and coverage preferences

Understanding your options helps you choose the right combination.

Why This Matters

Understanding Medicare Parts A, B, C, and D helps you:

choose the right coverage
avoid coverage gaps
manage healthcare costs effectively

Next Step

Now that you understand the different parts of Medicare, the next step is learning how Medicare works overall.

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