Medicare plan types, explained in plain English

Medicare has a lot of moving parts, but the big decisions come down to three things: Medicare Advantage, Medicare Supplement (Medigap), and Part D drug coverage. Here's what each one actually does.

Start here: what Original Medicare covers — and what it doesn't

Original Medicare is the federal program you pay into while working. It has two parts:

  • Part A (hospital insurance) — inpatient hospital stays, skilled nursing care after a hospital stay, and hospice. Most people pay no premium for Part A.
  • Part B (medical insurance) — doctor visits, outpatient care, lab work, and preventive services. Part B has a monthly premium.

Original Medicare covers a lot, but it leaves real gaps: after your deductibles, you generally pay about 20% of Part B costs — with no yearly limit on what you could owe — and it doesn't cover most prescription drugs. That's why nearly everyone adds coverage in one of the two ways below.

Path 1: Medicare Advantage (Part C)

Medicare Advantage plans are offered by private insurance companies as an alternative way to receive your Medicare benefits. You're still in the Medicare program — you just get your coverage through the plan instead of through Original Medicare directly.

What people tend to like:

  • One plan, one card — hospital, medical, and usually drug coverage bundled together.
  • Many plans in Florida have low monthly premiums, and every plan includes a yearly cap on your out-of-pocket medical costs.
  • Extras Original Medicare doesn't offer, like dental, vision, hearing, or fitness benefits, are common.

What to weigh carefully:

  • Most plans have provider networks (HMO or PPO). Your doctors and hospitals matter — we check them before anything else.
  • Some services need plan approval (prior authorization) before they're covered.
  • Costs come as copays as you use care, rather than one predictable premium.
  • Plan details can change each year, which is why an annual review matters.

Path 2: Medicare Supplement (Medigap)

A Medigap policy takes the opposite approach: you stay on Original Medicare, and the policy helps pay your share — deductibles, coinsurance, and that open-ended 20%. Plans are standardized by letter (Plan G and Plan N are the ones people ask about most), so a given letter has the same core benefits no matter which company sells it.

What people tend to like:

  • See any doctor or hospital in the U.S. that accepts Medicare — no networks, no referrals. Snowbirds and travelers value this.
  • Very predictable costs: after your premium, most covered medical bills are largely taken care of.
  • No prior-authorization layer from a private plan; if Medicare approves it, your supplement follows.

What to weigh carefully:

  • Monthly premiums are higher than most Advantage plans, and premiums can rise over time.
  • Medigap doesn't include drug coverage — you pair it with a standalone Part D plan.
  • Your strongest buying window is your Medigap Open Enrollment Period (the six months after Part B starts), when you can't be turned down for health reasons.

Part D: prescription drug coverage

Part D plans cover prescription drugs, either built into a Medicare Advantage plan or as a standalone plan alongside Original Medicare or Medigap. Two things matter more than the premium:

  • The formulary — every plan has its own list of covered drugs, sorted into cost tiers. The same medication can cost very different amounts on two different plans.
  • The pharmacy network — your pharmacy may be "preferred" on one plan and not on another, which changes your copays.

Don't skip drug coverage, even if you take nothing today. Going without creditable drug coverage after your enrollment window usually means a late-enrollment penalty added to your premium for as long as you have Part D — so most people enroll in at least a low-premium plan.

Side by side

Comparison of Medicare Advantage, Medigap, and Part D
 Medicare AdvantageMedigap + Part D
Monthly costOften low premiums; copays as you goHigher premiums; few bills afterward
DoctorsPlan network (HMO/PPO)Any doctor that accepts Medicare
Drug coverageUsually built inAdd a standalone Part D plan
Extras (dental, vision…)Often includedNot included; can add separately
Out-of-pocket capYes, set by each planGaps largely covered by the supplement

So which path is right for you?

Honestly: it depends, and anyone who answers before asking about your doctors, prescriptions, budget, and travel habits is guessing. There's no single plan that fits everyone — that's exactly why comparing matters.

That conversation is what I do all day. It's free, it takes about 15 minutes to get started, and there's no obligation to enroll in anything.

Want help sorting out your options?

Tell me about your doctors, your prescriptions, and your budget — I'll show you how the plans available in your county compare, in plain English.

Call Matt — free, no obligation