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Medicare plans, explained properly
The parts, the plan types, what each one actually covers, and how to tell which shape fits your doctors, your prescriptions and your budget.
Almost all Medicare confusion comes from one thing: the word "Medicare" is used for four different parts and two completely different ways of putting them together. Once those are separated out, the decision becomes manageable.
The four parts
| Part | What it covers | Notes |
|---|---|---|
| Part A Hospital |
Inpatient hospital stays, skilled nursing facility care, some home health and hospice. | Usually premium-free if you or a spouse worked and paid Medicare taxes long enough. |
| Part B Medical |
Doctor visits, outpatient care, lab work, durable medical equipment, preventive services. | Has a monthly premium, set nationally and higher for high incomes (IRMAA). |
| Part C Medicare Advantage |
A private plan that delivers your Part A and Part B benefits, usually with drug coverage and extras. | An alternative way to receive benefits — not an addition to them. |
| Part D Prescriptions |
Outpatient prescription drug coverage, sold by private carriers. | Standalone, or built into most Medicare Advantage plans. |
Part A and Part B together are called Original Medicare. It covers a great deal, but it leaves deductibles and coinsurance, and — importantly — it has no annual limit on what you could pay out of pocket. That gap is what the two plan routes below are designed to solve.
Two roads, and you pick one
Road 1: Original Medicare + Supplement + Part D
Keep Original Medicare, add a Medicare Supplement to pay its gaps, and add a standalone Part D drug plan.
- Any doctor or hospital nationwide that accepts Medicare
- No referrals, no network to check
- Higher monthly premium, very predictable costs
- Three pieces to manage: Medicare, the Supplement, the drug plan
Road 2: Medicare Advantage
A private plan takes over delivery of your benefits, usually including drugs and extra services.
- Often a low or $0 monthly plan premium
- Frequently includes dental, vision, hearing and other extras
- Network-based, and may require referrals
- You pay copays as you use care, up to an annual maximum
You are on one road or the other, not both. Choosing between them is the real decision, and it turns on how much you travel, how attached you are to specific doctors, how steady you need your monthly budget to be, and what your health looks like now.
Medicare Advantage (Part C)
An Advantage plan is offered by a private carrier approved by Medicare. It must cover everything Original Medicare covers, and most plans add prescription coverage plus benefits Original Medicare does not include at all.
What is good about them
- Low premiums. Many plans in Northeast Ohio carry a $0 plan premium, though you still pay your Part B premium.
- Everything in one card. Medical and drug coverage together, one carrier, one member services number.
- Extras. Dental, vision, hearing aids, fitness memberships, over-the-counter allowances and transportation appear on many plans.
- A cap on your exposure. Every Advantage plan has an annual out-of-pocket maximum. Original Medicare alone has none.
What to watch carefully
- Networks. HMO plans generally cover only in-network providers except in emergencies. PPO plans allow out-of-network care at higher cost. Your doctors must be checked, individually, every year.
- Prior authorization. Some services need the plan's approval before they are covered.
- Copays add up. A $0 premium is not $0 cost. If you use a lot of care, you pay as you go.
- Plans change annually. Networks, formularies, copays and extras are all re-filed each year.
Medicare Supplement (Medigap)
A Supplement sits alongside Original Medicare and pays some or all of what Medicare leaves behind — the Part A hospital deductible, the 20% coinsurance on Part B, and so on. Plans are standardized by letter, so a Plan G from one carrier covers exactly the same things as a Plan G from another. What differs between carriers is the price, the rate history and the service.
What is good about them
- Freedom of provider. Any doctor or hospital in the country that accepts Medicare. No network, no referrals.
- Predictability. You know your monthly cost, and your share of covered care is small or nothing.
- Travel. Ideal if you spend part of the year elsewhere or split time between states.
- Stability. The benefits are standardized and do not get re-shuffled each year the way Advantage benefits can.
What to watch carefully
- Higher monthly premium, which generally increases with age and inflation over time.
- No drug coverage. You must add a standalone Part D plan separately.
- No extras. Dental, vision and hearing are not included and are bought separately.
- Medical underwriting later. This is the big one — see the warning below.
The timing detail that catches people
When you first enroll in Part B at 65, you have a one-time Medigap Open Enrollment window during which a Supplement must be sold to you regardless of your health. Outside that window and outside specific guaranteed-issue situations, carriers in Ohio may generally require medical underwriting — meaning a Supplement can be declined or priced up because of your health history. That is why the decision at 65 deserves real thought: moving from Advantage to a Supplement years later is not always possible.
Part D prescription drug plans
Part D is where I see the most money left on the table, because people choose a drug plan on its monthly premium alone. The premium is often the smallest part of what you will actually spend.
What genuinely determines your cost:
- The formulary. Is each of your drugs on the plan's list at all? If not, it is essentially uncovered.
- The tier. The same drug can sit on a cheap tier with one plan and an expensive tier with another.
- The pharmacy. Preferred pharmacies cost less than standard ones on the same plan. Where you fill matters.
- Restrictions. Prior authorization, step therapy and quantity limits can block or delay a prescription.
The right way to do this is to enter every medication, at its actual dose and quantity, and compare total projected annual cost across plans — premium plus deductible plus copays. That is a twenty-minute job with the right tools and it routinely saves people hundreds of dollars a year. Bring me your prescription bottles and we will run it.
Late enrollment penalties are permanent
If you go without creditable drug coverage for 63 days or more after you were first eligible, a Part D late enrollment penalty is added to your premium — and it generally stays there for as long as you have Part D. The same principle applies to Part B. These penalties are entirely avoidable with correct timing, which is the main reason to talk to somebody early.
When you can enroll or change
| Period | When | What you can do |
|---|---|---|
| Initial Enrollment Period | Seven months around your 65th birthday | Enroll in Medicare and choose your plan for the first time. |
| Annual Enrollment Period | October 15 – December 7 | Change Advantage or Part D plans for the coming year. |
| Medicare Advantage Open Enrollment | January 1 – March 31 | If you are on an Advantage plan, switch once or return to Original Medicare. |
| Special Enrollment Periods | Triggered by an event | Moving, losing employer coverage, gaining or losing Medicaid, and other qualifying changes. |
Rules and dates can change from year to year, and eligibility depends on your specific circumstances. Call and I will tell you exactly which window applies to you.
We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.
Irwin Health & Life Insurance is not connected with or endorsed by the United States government or the federal Medicare program. This site is intended as general information and as a solicitation for insurance. A licensed agent may contact you.
Which road is right for you?
It depends on your doctors, your prescriptions, your travel and your budget. One conversation settles it — and it costs you nothing.