The Medicare Insider: 7 Things Insurance Companies Hope You Never Find Out

During Open Enrollment, you'll see advertisements everywhere — on TV, in your mailbox, at the grocery store — promoting Medicare Advantage plans with long lists of "free" extras. Dental. Vision. Hearing. Gym memberships. Meal delivery. Over-the-counter allowances. Transportation.

These benefits are real. But they are not the most important thing about your Medicare plan. And insurance companies know that advertising them works — because they pull your attention away from the four things that will actually determine whether you're happy with your plan when you need it most.

Here's what you need to know about "free benefits": the insurance company is required by Medicare to offer a minimum level of coverage. The extras they advertise are funded by the money they save by managing — and sometimes denying — your actual medical care. A plan that offers a generous gym allowance and a rich dental benefit may also have a $7,550 out-of-pocket maximum and a network that doesn't include your specialist.

That $7,550 is just for in-network services. If your doctor or hospital is out of network — even in an emergency — you may have no limit at all on what you owe.

Compare that to a Medicare Supplement (Medigap) plan, which may have no network restrictions and can cover most or all of your out-of-pocket costs — but has a monthly premium and fewer "extra benefits."

There is no free lunch in Medicare. Every benefit has to be funded somehow. Your job is to understand what's being traded, not just what's being advertised.

Imagine your doctor tells you that you need a procedure. Maybe it's an MRI. Maybe it's a surgery. Maybe it's a medication. You've been paying for Medicare coverage your whole life. You expect it to be covered.

Then a letter arrives. Your plan requires "prior authorization" — meaning the insurance company has to approve the procedure before it happens. Until they approve it, you wait.

Medicare Advantage plans can — and do — require prior authorization for services that Original Medicare covers without any pre-approval. This is one of the most significant differences between Medicare Advantage and Original Medicare, and it is almost never mentioned in enrollment conversations.

The HHS Inspector General has repeatedly found that Medicare Advantage plans deny prior authorization requests for services that should be covered under Medicare rules. Many of these denials are eventually reversed on appeal — but the appeals process takes time, causes stress, and requires persistence most sick people don't have the energy for.

This doesn't mean all Medicare Advantage plans are bad — many people have excellent experiences with them. But you need to know this exists before you enroll, not after you're waiting three weeks for an approval to see a specialist.

You did your homework. You checked that your doctor was in-network. You enrolled. You're happy.

Then, in September of the following year, you receive your Annual Notice of Change. Buried on page 14 is a notice that your primary care physician — the one you've seen for eight years — is no longer in the plan's network.

Provider networks change every year. Doctors join networks, leave networks, and are sometimes removed entirely. A plan that includes your doctor today may not include that doctor on January 1st. And once you're enrolled, switching plans is restricted to specific enrollment windows.

This is particularly dangerous for people with specialists — oncologists, cardiologists, neurologists — who they have established relationships with. Switching specialists mid-treatment is not just inconvenient. It can be medically dangerous.

Original Medicare, by contrast, works with any doctor in the country who accepts Medicare — and about 93% of physicians do. With a Medicare Supplement plan alongside it, your coverage travels with you and your doctor choices remain entirely your own.

The "$0 premium" Medicare Advantage plan is one of the most effective marketing tools in the insurance industry. It sounds like the best possible deal — Medicare coverage that costs you nothing every month.

And if you're healthy and don't use much healthcare, it might be. But most people purchase health insurance precisely because they might need it. And when you need it, the monthly premium is the least important number in your plan.

*Depends on plan type. Plan G covers most costs after the Part B deductible.

A person who has a cardiac event and spends several days in the hospital under a $0 premium Medicare Advantage plan could owe thousands of dollars in copays and coinsurance — far more than they would have saved in premiums over several years. Meanwhile, someone with a Medicare Supplement Plan G might owe little or nothing beyond their annual deductible.

You've been taking the same medication for five years. You know what it costs. You've budgeted for it. You enroll in a new Medicare plan and assume your drug costs will stay roughly the same.

Then January arrives. Your pharmacy charges you three times what you paid last year. Or worse — tells you the medication isn't covered at all.

Every Medicare Part D drug plan (and every Medicare Advantage plan with drug coverage) uses a formulary — a list of covered medications organized into tiers. Higher tiers mean higher costs to you. And formularies change every year.

The most common surprise: a medication that was on Tier 2 last year gets moved to Tier 3 or 4 in the new plan year — or gets removed from the formulary entirely. This happens to thousands of Medicare beneficiaries every year, and most don't find out until they're standing at the pharmacy counter.

There's also the matter of the Medicare Part D deductible — up to $545 in 2024 — which resets every January 1st. And while the catastrophic coverage gap ("donut hole") has been narrowed by legislation, specialty drugs can still create significant cost exposure.

Medicare has rules. Specific enrollment windows. Specific deadlines. Penalties for missing them. And once certain decisions are made — especially early in your Medicare journey — they can be very difficult or impossible to reverse.

The most costly enrollment mistake most people don't know about: missing your Medigap Open Enrollment Period.

When you first turn 65 and enroll in Medicare Part B, you have a 6-month window during which insurance companies are required to sell you any Medicare Supplement (Medigap) plan at the best available rate — regardless of your health history. They cannot deny you or charge you more because of a pre-existing condition.

This is why many Medicare advisors recommend people consider their long-term healthcare needs — not just what's cheapest today — when they first enroll. A 65-year-old in excellent health who switches to a Medicare Advantage plan for its low cost may find, at 72 with a chronic diagnosis, that they cannot get a Medigap plan they can now afford.

There are also penalties for late enrollment in Part B and Part D — 10% per year for Part B, 1% per month for Part D — that are permanent and compound over time.

Not all Medicare agents are the same — and the difference matters enormously for the advice you receive.

A captive agent works for one insurance company. They can only show you that company's plans. They may be excellent, knowledgeable, and well-intentioned — but their options are structurally limited. If the best plan for you happens to be from a carrier they don't represent, you'll never know.

An independent agent represents multiple carriers and is contractually able to show you plans from any company they're appointed with. When they recommend a plan, it's because they've compared the available options — not because it's the only one on their shelf.

An independent agent who specializes in Medicare should be your first call — not your last resort. They can compare every plan in your area, check your doctors and medications, explain every option in plain language, and advocate for you if something goes wrong — all at no cost to you.