Medicare Guide

How Medicare Works

Medicare works best when you understand three things: what Original Medicare covers, how private plan options can change your coverage, and which enrollment rules apply to your situation. This guide gives you the big picture first, then points you to the deeper Medicare topics when you are ready.

Reviewed by Calvin Bagley, Licensed Insurance Agent since 2011 · Published May 15, 2026 · Last updated August 14, 2026

Quick answer

Medicare starts with Parts A and B. Your real decision is how you want the rest of your coverage to work.

Most people compare Original Medicare with add-ons against Medicare Advantage. The right path depends on local plan availability, doctors, prescriptions, budget, travel, and timing.

Key takeaways

Original Medicare is made up of Part A and Part B.
Part D helps with prescription drug coverage.
Medicare Advantage, also called Part C, is an alternative way to receive Medicare benefits through private insurance companies.
Medicare Supplement plans, also called Medigap, can help pay certain costs left by Original Medicare.
Your best path depends on doctors, prescriptions, budget, travel, timing, and local plan availability.

2026 cost snapshot

The numbers people usually ask about first

Medicare costs can change each year. These figures give you the starting point before we compare the plan details that depend on your county, prescriptions, doctors, and coverage path.

Part B standard premium

$202.90/moMost people pay the standard Part B premium in 2026. Higher-income beneficiaries may pay more.

Part B deductible

$283This is the 2026 annual deductible before Original Medicare Part B starts to pay.

Part A hospital deductible

$1,736This is per inpatient hospital benefit period in 2026, not a simple once-per-year deductible.

Part D covered drug cap

$2,100For covered Part D drugs in 2026, out-of-pocket spending reaches catastrophic coverage at this amount.

The parts of Medicare

Start with the four Medicare parts

These are the core building blocks. Once you understand what each part does, the plan choices start to make more sense.

Part AHospital coverage

Generally connected with inpatient hospital care, skilled nursing facility care, hospice, and some home health care.

Read morePart BMedical coverage

Generally connected with doctor visits, outpatient care, preventive services, durable medical equipment, and many medical services.

Read morePart CMedicare Advantage

A private-plan alternative to Original Medicare. Plans vary by county, network, benefits, prescriptions, and cost structure.

Read morePart DDrug coverage

Prescription drug coverage that can be stand-alone with Original Medicare or included in many Medicare Advantage plans.

Read more

What is Medicare?

Medicare is federal health insurance mainly for people age 65 or older, and for some younger people with disabilities or certain medical conditions. The basic starting point is Original Medicare: Part A and Part B. From there, many people decide whether they want to add prescription drug coverage, buy a Medicare Supplement plan, or use a Medicare Advantage plan instead.

How the parts of Medicare fit together

Part A and Part B create the foundation. Part A is commonly described as hospital coverage. Part B is commonly described as medical coverage. Part D is prescription drug coverage. Part C, also called Medicare Advantage, is a private-plan way to receive Medicare benefits. The confusing part is that people do not usually choose every part separately. They usually choose a coverage path, and that path changes how premiums, deductibles, networks, drug costs, and out-of-pocket risk work.

The two main ways people use Medicare

Most people compare two broad paths. One path is Original Medicare, often paired with a Medicare Supplement plan and a Part D drug plan. The other path is Medicare Advantage, where a private plan manages the Medicare benefits and may include drug coverage and extra benefits. Neither path is automatically best for everyone. The right choice depends on how you use care, whether your doctors participate, what prescriptions you take, how much travel flexibility you want, and whether you prefer paying more predictable premiums or accepting more pay-as-you-go cost sharing.

Why your county, doctors, and prescriptions matter

Medicare is not just one national checklist. Medicare Advantage and Part D plan availability can vary by county. Doctors, hospitals, pharmacies, prescription lists, premiums, copays, deductibles, travel habits, and service preferences can all change the comparison. A plan that works well for one person may be a poor fit for a neighbor.

When people usually need to make Medicare decisions

Common decision points include turning 65, retiring or losing employer coverage, moving, qualifying for a Special Enrollment Period, and reviewing coverage during Medicare's annual enrollment season. Timing matters because late enrollment penalties, underwriting rules, and plan-change limits can affect what options are available.

A simple way to think about Medicare

Start with eligibility and timing. Then understand Parts A and B. Then compare whether Original Medicare with add-ons or Medicare Advantage fits the way you use doctors, prescriptions, travel, and budget. Finally, review your coverage regularly because plans, networks, drug costs, and personal needs can change. A strong Medicare decision is not just picking a plan; it is matching the plan to the way you actually live.

Coverage paths

The two big Medicare paths people usually compare

The right answer is not the same for everyone. The better question is which path fits the way you use care.

Original Medicare + optional add-ons

You use Medicare Part A and Part B as the foundation. Many people also compare a Medicare Supplement plan to help with certain out-of-pocket costs and a stand-alone Part D plan for prescriptions.

Medicare Supplement Plans Medicare Part D Medicare Plan N vs Plan G

Medicare Advantage

You receive Medicare benefits through a private Medicare Advantage plan instead of Original Medicare alone. Plans often include networks and may include prescription, dental, vision, hearing, and other benefits.

Medicare Part C Medicare Advantage Does Medicare Cover Dental?

Go deeper

Related Medicare guides

Use this page as your Medicare starting point, then jump into the specific topic that matches your situation.

Common questions

Questions people usually ask next

These answers are a starting point. Medicare details can change based on timing, other coverage, and where you live.

Is Medicare free?

Some people qualify for premium-free Part A, but Medicare is not automatically free. In 2026, the standard Part B premium is $202.90 per month and the Part B deductible is $283. Depending on your coverage path, you may also have plan premiums, deductibles, copays, coinsurance, and prescription drug costs.

Do I need both Part A and Part B?

Many Medicare coverage choices require both Part A and Part B, but timing can be different for people who are still working or have qualifying employer coverage. It is worth checking before delaying or enrolling.

Is Medicare Advantage the same as Medicare Supplement?

No. Medicare Advantage is an alternative way to receive Medicare benefits through a private plan. Medicare Supplement, or Medigap, works with Original Medicare to help pay certain costs Original Medicare leaves behind.

Can The Medicare Store help me compare all of this?

Yes. The Medicare Store helps people compare Medicare choices at no fee to the consumer, including doctors, prescriptions, budget, timing, and local plan availability.

Official references

Sources checked for this guide

These guides are written in plain English, but the 2026 cost figures and coverage rules should stay tied to official Medicare and CMS source material.

Medicare.gov: How Medicare works Medicare.gov: 2026 Medicare costs CMS: 2026 Part A and Part B costs Medicare.gov: Part D costs Medicare.gov: Medicare Advantage options Medicare.gov: Medigap basics

About the reviewer

Calvin Bagley · Licensed Insurance Agent since 2011 · Nevada license #820948

Calvin Bagley is the founder and president of The Medicare Store and has been a licensed insurance agent since 2011 (Nevada license #820948). He built The Medicare Store around free, unhurried Medicare guidance from local agents, and still works with clients and agents across every Medicare Store market.

Need help applying this?

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