Parts of Medicare Explained: A, B, C & D (2026)

Q: Do I need all four parts of Medicare?

Most people take Parts A and B, then either add a Medigap plan plus a Part D drug plan, or choose a Medicare Advantage plan that bundles everything. You pick one road, not all four separately.

Q: Is Medicare Part A really free?

The premium is $0 for most people who paid Medicare taxes for at least 10 years, but using it isn't free — in 2026 there is a $1,736 deductible per benefit period for a hospital stay.

Medicare comes in four parts — A, B, C, and D — and each one has a specific job. The confusion usually comes from not knowing which part does what, and how they overlap. So let's clear it up, one letter at a time.

Quick map before we dive in: Parts A and B together are called "Original Medicare." Part C (Advantage) is a private alternative that bundles them, and Part D adds prescription drug coverage. Now the details.

Part AHospital Insurance

Part A is your hospital coverage — the "inpatient" side of Medicare. It kicks in when you're formally admitted to a facility.

Inpatient hospital stays
Skilled nursing facility care (after a qualifying stay)
Hospice care
Some home health services

$0monthly premium for most people (if you worked 10+ years / 40 quarters)

It's not 100% free once you use it, though. In 2026, there's a $1,736 deductible per benefit period before Part A starts paying for a hospital stay.

SRIG take: Because it's premium-free for most people, nearly everyone takes Part A at 65 — you already earned it through a lifetime of payroll taxes. There's rarely a reason to skip it.

Part BMedical Insurance

Part B is your medical coverage — the "outpatient" side. This is the everyday healthcare you use most.

Doctor visits and specialists
Outpatient and preventive care
Lab tests, screenings, and vaccines
Durable medical equipment (walkers, wheelchairs, etc.)

$202.90standard monthly premium in 2026 (higher earners pay more via IRMAA)

In 2026 there's a $283 annual deductible, and after that you typically pay 20% of the cost of most services — with no cap. That "no cap" part is the single most important thing to understand about Original Medicare.

SRIG take: That open-ended 20% is exactly why almost nobody stops at just A and B. One serious illness could mean tens of thousands out of pocket — which is where Part C or a Supplement comes in.

Part CMedicare Advantage

Part C, better known as Medicare Advantage, isn't extra coverage — it's a private plan that replaces the way you get Parts A and B. A private insurer bundles it all into one plan, usually adding extras.

All of Part A and Part B, through one private plan
Prescription drug coverage (Part D) usually built in
Extras like dental, vision, hearing, and gym benefits
A yearly out-of-pocket maximum (up to $9,850 in-network in 2026)

$0premium on many plans — but you pay copays as you use care

The trade-off: Advantage plans use provider networks, and your costs come as copays when you actually receive care. Great for some people, not ideal for others.

SRIG take: Advantage is convenient and low-premium, but the networks and copays matter. Whether it's right for you depends on your doctors, meds, and how much you travel — that's the conversation we walk you through.

Part DPrescription Drug Coverage

Part D covers your prescription medications. You get it either as a standalone drug plan (paired with Original Medicare) or built into a Medicare Advantage plan.

Retail and mail-order prescription drugs
Plan-specific drug lists (formularies) that set your costs
New for 2026: a hard $2,100 annual out-of-pocket cap on covered drugs

Don't skip it to save a few dollars. Go without creditable drug coverage and Medicare adds a permanent late penalty — 1% of the national base premium for every month you went without, for life. Even if you take no medications today, enrolling protects you from the penalty and caps your risk if you ever need something expensive.

SRIG take: That new $2,100 cap is a genuine game-changer for anyone on pricey medications. We take your actual drug list and find the plan that keeps your yearly cost as low as possible.

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How They Fit Together

Here's where it clicks. Everyone starts with Original Medicare (A + B). From there, you pick one of two roads to fill the gaps:

Road 1

A + B + Medigap + Part D

Keep Original Medicare
Add a Medigap plan to cover the 20% gap
Add a standalone Part D drug plan
Any doctor nationwide that takes Medicare

Road 2

Part C (Medicare Advantage)

One private plan replaces A + B
Drug coverage (D) usually built in
Extras like dental & vision
Network-based, with copays and a yearly max

SRIG take: There's no universally "best" road — only the best one for you. It comes down to your doctors, your medications, your budget, and how much you travel. That's exactly what a free Blueprint call sorts out.

The 2026 Numbers, At a Glance

$202.90

Part B premium / month

$283

Part B annual deductible

$1,736

Part A hospital deductible

$2,100

Part D out-of-pocket cap

Higher earners pay more for Parts B and D through IRMAA surcharges. Medicare Advantage in-network out-of-pocket maximums can run up to $9,850 in 2026.

Common Questions

Do I need all four parts of Medicare?

Not all four separately. Most people take Parts A and B (Original Medicare), then either add a Medigap plan plus a Part D drug plan, or choose a Medicare Advantage plan (Part C) that bundles everything into one. You don't stack Part C on top of a Supplement — you pick one road.

What's the difference between Part C and Medigap?

Part C (Medicare Advantage) replaces how you get Parts A and B through a private plan with networks and copays. Medigap works alongside Original Medicare and pays the gaps it leaves, letting you use any doctor that accepts Medicare. They're two different roads — you choose one.

Is Part A really free?

The monthly premium is $0 for most people who worked and paid Medicare taxes for at least 10 years. But using it isn't free — in 2026 there's a $1,736 deductible per benefit period for a hospital stay.

What doesn't Original Medicare (A & B) cover?

On its own, Original Medicare doesn't cap your 20% share of costs, and generally doesn't cover routine dental, vision, hearing, or prescription drugs. That's why most people add a Supplement plus Part D, or choose an Advantage plan — to fill those gaps.

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Your Next Step

Now you know what all four parts do. The next question is which combination is right for you:

Watch the video above — we break down all four parts and how they fit together.
Book a Blueprint consultation — we'll map the exact parts and plans that fit your doctors, meds, and budget in your ZIP code.

Your blueprint is waiting. Let's build it together.

Medicare Blueprint: Parts A, B, C, D

Part AHospital Insurance

Part BMedical Insurance

Part CMedicare Advantage

Part DPrescription Drug Coverage

How They Fit Together

A + B + Medigap + Part D

Part C (Medicare Advantage)

The 2026 Numbers, At a Glance

Not sure which parts you actually need?

Common Questions

Your Next Step