Medicare is one of the most important financial decisions you'll make in retirement — and one of the most confusing. With dozens of plan types, enrollment windows, and coverage gaps to navigate, it's easy to feel overwhelmed before you even get started.
This guide cuts through the noise. We'll walk you through exactly what Medicare covers, what it doesn't, and how to choose the right plan for your health needs and budget.
What Is Medicare, and Who Qualifies?
Medicare is the federal health insurance program for Americans 65 and older, as well as certain younger individuals with qualifying disabilities or conditions like End-Stage Renal Disease (ESRD).
You're automatically enrolled in Medicare Part A and Part B if you're already receiving Social Security benefits when you turn 65. If not, you'll need to sign up during your Initial Enrollment Period — a 7-month window that starts 3 months before your 65th birthday.
Missing this window can result in permanent late-enrollment penalties, so timing matters.
The Four Parts of Medicare
Part A — Hospital Insurance
Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health services. Most people don't pay a premium for Part A if they or their spouse paid Medicare taxes for at least 10 years.
However, Part A comes with a deductible — $1,632 per benefit period in 2024 — and coinsurance costs for extended hospital stays.
Part B — Medical Insurance
Part B covers outpatient care, doctor visits, preventive services, and durable medical equipment. You pay a monthly premium for Part B (the standard amount is $174.70/month in 2024, though higher earners pay more) plus a $240 annual deductible and 20% coinsurance after that.
Together, Part A and Part B are called Original Medicare. They provide solid foundational coverage — but they leave significant gaps, including no cap on out-of-pocket costs.
Part C — Medicare Advantage
Medicare Advantage plans are offered by private insurance companies approved by Medicare. They bundle Part A and Part B coverage (and usually Part D) into a single plan, often with added benefits like dental, vision, and hearing.
Advantage plans typically have lower premiums than Supplement plans but come with network restrictions (HMO or PPO) and cost-sharing like copays and deductibles.
Best for: People who want an all-in-one plan, prefer lower monthly premiums, and are comfortable staying within a provider network.
Part D — Prescription Drug Coverage
Part D plans cover prescription medications and are sold by private insurers. If you have Original Medicare or a Medicare Supplement plan, you'll need to add a standalone Part D plan to get drug coverage.
Costs vary widely by plan, so it's worth comparing formularies (the list of covered drugs) to make sure your medications are covered at a reasonable tier.
Medicare Supplement (Medigap) Plans
Medigap plans are sold by private insurers to fill the coverage gaps left by Original Medicare — things like deductibles, coinsurance, and copays. There are 10 standardized Medigap plan types (labeled A through N), and the benefits are identical regardless of which insurer sells them.
The key advantages of Medigap:
- No network restrictions — see any doctor or specialist who accepts Medicare, anywhere in the country
- Predictable costs — most plans cover your 20% coinsurance, so you know what you'll pay
- No referrals needed for specialists
The tradeoff is a higher monthly premium compared to Medicare Advantage. But for people who travel frequently, have complex health needs, or simply want the freedom to choose any provider, Medigap is often worth it.
Medicare Advantage vs. Medicare Supplement: Which Is Right for You?
This is the question we get most often — and the honest answer is: it depends.
| | Medicare Advantage | Medicare Supplement |
|---|---|---|
| Monthly premium | Lower | Higher |
| Network | Restricted (HMO/PPO) | Any Medicare provider |
| Out-of-pocket max | Yes (varies by plan) | Minimal to none |
| Drug coverage | Usually included | Separate Part D needed |
| Extra benefits | Often yes (dental, vision) | Rarely |
Choose Medicare Advantage if you're generally healthy, want lower premiums, and are comfortable with a network.
Choose Medicare Supplement if you have ongoing health conditions, see specialists regularly, or want the peace of mind of predictable costs and nationwide coverage.
When Can You Enroll?
Initial Enrollment Period (IEP)
Your 7-month window around your 65th birthday. This is the best time to enroll — you won't face late penalties and you have the most plan options.
Annual Enrollment Period (AEP)
October 15 – December 7 each year. During this window, you can switch Medicare Advantage plans, switch from Advantage back to Original Medicare, or change your Part D plan. Changes take effect January 1.
Special Enrollment Periods (SEP)
If you're still working at 65 and covered by employer insurance, you can delay Medicare enrollment without penalty. You'll get a Special Enrollment Period when that coverage ends.
Common Medicare Mistakes to Avoid
1. Missing your Initial Enrollment Period. The late enrollment penalty for Part B is 10% per year you were eligible but didn't enroll — and it's permanent.
2. Assuming Medicare covers everything. Original Medicare doesn't cover dental, vision, hearing, or long-term care. Make sure your plan fills those gaps.
3. Choosing a plan based on premium alone. A $0 premium Advantage plan might cost you more in copays and coinsurance if you use healthcare frequently. Look at total out-of-pocket exposure.
4. Not reviewing your plan annually. Plans change every year — formularies shift, premiums increase, and networks narrow. Review your coverage each fall during AEP.
5. Going it alone. Medicare is genuinely complex. Working with a licensed Medicare broker costs you nothing — brokers are compensated by the insurance carriers, not by you.
How a Licensed Medicare Broker Can Help
An independent Medicare broker like RightQuote works with multiple carriers, which means we can compare plans objectively and recommend what's actually best for your situation — not just what one company offers.
We'll help you:
- Compare Medicare Advantage and Supplement plans side by side
- Review your medications against Part D formularies to minimize drug costs
- Understand your enrollment timeline and avoid costly penalties
- Review your coverage every year to make sure it still fits your needs
And because brokers are compensated by the insurance carriers, our guidance is completely free to you.
The Bottom Line
Medicare doesn't have to be overwhelming. Once you understand the basics — Original Medicare, Advantage, Supplement, and Part D — the decisions become much clearer.
The most important thing is to start early, compare your options carefully, and don't be afraid to ask for help. A licensed Medicare broker can save you time, money, and a lot of headaches.
Ready to explore your Medicare options? Our licensed brokers are here to walk you through everything — at no cost to you.