New here? Start with the basics. Medicare is made up of several parts, each covering something different — hospital care, doctor visits, private plan alternatives, and prescription drugs. This site breaks down every part in plain English, with current 2026 costs and clear answers to the questions people actually ask. Pick a topic below to dive in.
What Is Medicare, and Why Is It Split Into Parts?
Medicare is the federal health insurance program for people 65 and older, and for some younger people with disabilities or specific conditions like End-Stage Renal Disease or ALS. It’s run by the Centers for Medicare & Medicaid Services (CMS), and it’s built from several distinct pieces rather than one single plan — which is exactly why it feels confusing at first.
Part A and Part B together make up “Original Medicare,” run directly by the federal government. Part C (Medicare Advantage) is an alternative way to get those same benefits through a private insurer. Part D adds prescription drug coverage. And because Original Medicare doesn’t cover 100% of your costs, many people add a Medigap policy or, if their income is limited, get help through Medicaid. None of these pieces are optional add-ons you can skip past — understanding how they fit together is really the whole task of “understanding Medicare.”
What’s New for 2026
Medicare’s rules and costs change every year, and 2026 brought some genuinely significant updates worth knowing about even if you’ve had Medicare for years:
- A new $2,100 cap on Part D drug costs — the old “coverage gap” or donut hole is gone entirely. See how the new structure works.
- Expanded colorectal cancer screening, now including CT colonography as a covered option under Part B.
- A new telehealth rule starting January 31, 2026, requiring most virtual visits to happen from a qualifying rural location. See what’s changing and the exceptions.
- Medicare-negotiated drug prices for the first 10 selected Part D drugs took effect January 1, 2026.
- Higher premiums and deductibles across the board — Part A’s deductible rose to $1,736 and Part B’s premium rose to $202.90 a month.
The Four Parts of Medicare
Part A: Hospital Insurance
Covers inpatient hospital stays, skilled nursing facility care, hospice, and home health care. Most people get it with no monthly premium because they or their spouse paid Medicare taxes while working. When you do pay out of pocket, it’s structured around “benefit periods” rather than a simple yearly deductible, which trips up a lot of people the first time they’re hospitalized. Read the complete Part A guide, or jump straight to 2026 Part A costs or is Part A free?
Part B: Medical Insurance
Covers doctor visits, outpatient care, preventive services, and durable medical equipment for a $202.90 monthly premium in 2026, plus a $283 yearly deductible. Unlike Part A, almost everyone pays a premium for Part B, and higher earners pay more through an income-related surcharge called IRMAA. A wide range of preventive care — annual wellness visits, cancer screenings, diabetes support — is covered at $0. Read the complete Part B guide, or see 2026 Part B costs or the full preventive services list.
Part C: Medicare Advantage
An alternative way to get your Part A and Part B benefits through a private insurer, often bundled with drug coverage and extra benefits like dental, vision, and hearing that Original Medicare doesn’t include. In exchange, you’ll typically use a network of doctors rather than seeing anyone nationwide, and every plan comes with a built-in yearly out-of-pocket maximum. Read the complete Part C guide, or compare Medicare Advantage vs. Original Medicare and see the plan types explained.
Part D: Prescription Drug Coverage
Helps pay for prescription drugs, with a new $2,100 out-of-pocket cap starting in 2026 replacing the old, confusing coverage gap. You can get it as a standalone plan alongside Original Medicare, or bundled into most Medicare Advantage plans. If you delay enrolling without other qualifying drug coverage, a permanent late enrollment penalty can apply. Read the complete Part D guide, or see the 2026 cost breakdown and how Extra Help can lower your costs further.
Original Medicare or Medicare Advantage?
This is usually the biggest fork in the road. Original Medicare (Parts A and B) lets you see any provider nationwide that accepts Medicare, with no network restrictions, but no yearly out-of-pocket cap unless you add a Medigap policy. Medicare Advantage plans usually restrict you to a network, but include a built-in spending limit and often extra benefits Original Medicare doesn’t offer. Neither one is universally “better” — it depends on how often you travel, which doctors you want to keep seeing, and how you feel about network restrictions versus nationwide flexibility. See a full side-by-side comparison to help you decide.
Filling the Gaps
Original Medicare (Part A and Part B) doesn’t cover everything. Medigap is private insurance that helps cover the deductibles and coinsurance left over — see our full plan comparison (A through N) or how to choose the best plan for your needs. If your income is limited, Medicaid and Medicare Savings Programs can help pay your premiums and cost-sharing too, and may also qualify you for Extra Help with drug costs.
Getting Enrolled
Whether you’re automatically enrolled or need to sign up yourself depends on your situation. If you’re already collecting Social Security when you turn 65, enrollment happens without you lifting a finger; if not, you’re responsible for signing up during your Initial Enrollment Period to avoid delays and penalties. Start with our step-by-step enrollment guide, or go straight to the details on who’s enrolled automatically and how to avoid late enrollment penalties.
How to Choose the Right Coverage for You
If you’re starting from scratch, a reasonable order of operations is: confirm your eligibility and enrollment timing first, decide between Original Medicare and Medicare Advantage second, add Part D drug coverage (or confirm it’s bundled in) third, and only then decide whether a Medigap policy makes sense for your specific risk tolerance and budget. Rushing this order — especially picking a Medicare Advantage plan before checking whether your preferred doctors are in-network — is one of the most common regrets people share after enrolling.
Popular Questions
- What’s the difference between Part A and Part B?
- Is Medicare Part A free?
- What doesn’t Medicare Part A cover?
- What is the Medicare Part D out-of-pocket cap in 2026?
- When can I switch Medicare Advantage plans?
- When is my Medigap open enrollment period?
- Can I have Medicare and Medicaid at the same time?
- Does Medicare cover dental care?
- How do I spot and report Medicare fraud?
- Medicare Part A: Frequently Asked Questions
Why Trust This Guide
Every page on this site is written in plain English first. If you don’t understand the content, the details don’t matter. All content is based on the official CMS “Medicare & You” handbook and Medicare.gov. We review and update our figures annually each fall when premiums and coverage changes are released. Read more about this site.
