The Four Main Parts of Medicare: A Simple Overview

To make sense of the program, it helps to think of Medicare as a set of building blocks. You start with the foundation and then add pieces depending on your needs. The system is often called the “alphabet soup” of healthcare, but it becomes much clearer when you look at each letter individually.

Part A is Hospital Insurance. This is the part that helps cover costs if you are admitted to a hospital or a skilled nursing facility. It also covers hospice care and some home health care.

Part B is Medical Insurance. This piece covers your everyday medical needs, like doctor visits, outpatient care, preventive services (like flu shots), and medical supplies.

Together, Parts A and B are known as Original Medicare. This is the traditional, government-run program that forms the foundation of coverage for millions of Americans.

Part C is Medicare Advantage. This is an alternative to Original Medicare. These are “all-in-one” plans offered by private insurance companies that are approved by Medicare. They bundle Parts A, B, and often Part D (prescription drugs) into a single plan.

Part D is Prescription Drug Coverage. This part helps pay for your medications. It is offered by private insurance companies and can be added to Original Medicare or is often included in a Medicare Advantage plan.

So, your main choice will be between two paths. The first path is Original Medicare (Parts A and B), to which you can add a Part D plan for drugs and potentially a Medigap plan to help with out-of-pocket costs. The second path is to choose a Medicare Advantage plan (Part C) that bundles everything together. We will explore each of these in more detail now.