For anyone within a year of 65
Turning 65 soon? Stop doing these five Medicare things.
A few habits quietly cost new Medicare enrollees money and coverage every year. None of them are your fault — the system just wasn’t built to explain itself. Here’s what to drop before your birthday hits, and what to do instead so nothing catches you off guard.
Most people don’t get Medicare wrong because they weren’t paying attention. They get it wrong because nobody tells them the deadlines, the penalties, or the fine print until after it matters.
These five habits show up again and again in the months before someone’s 65th birthday. Catch them early and the rest of the process gets a lot simpler.
Part of what makes Medicare so easy to get wrong is that it isn’t one program — it’s several, layered on top of each other, each with its own enrollment rules and its own penalties for missing them. Original Medicare, Medicare Advantage, Medicare Supplement, and Part D drug coverage all operate on slightly different timelines, and the consequences for getting the timing wrong range from a minor inconvenience to a penalty that follows you for the rest of your life on Medicare.
None of that is meant to be alarming. It’s meant to explain why “I’ll figure it out when I get there” doesn’t work as well with Medicare as it does with most other decisions. A little preparation in the months before your 65th birthday puts you in control of the process, instead of reacting to whatever letter shows up in the mail.
Ready to see your actual options? Explore Medicare, Medicare Advantage, Medicare Supplement, and Medicare Part D plans available through Brady Insurance Marketing.
Waiting until your birthday month to start looking
Your Initial Enrollment Period actually opens three months before you turn 65 and closes three months after — seven months total. Wait until the month of, and you’ve already burned half your window. Enroll late within that window, and your coverage can even start later than it would have if you’d signed up earlier, leaving an unexpected gap right when you need coverage most.
Start comparing options at least three months before your birthday, even if you don’t plan to enroll right away.
Assuming your employer plan means you can skip Part B
If your employer has fewer than 20 employees, Medicare typically expects to become your primary coverage at 65 regardless of your job plan. Skip enrolling and you can be left with unpaid claims and a late penalty later. Larger employers have different rules, which is exactly why this is worth confirming rather than assuming — the size of your specific employer changes the answer entirely.
Check your employer’s size and plan rules directly with HR before deciding to delay Part B.
Choosing a plan by premium alone
The cheapest monthly premium can hide a narrow provider network or a drug formulary that doesn’t include what you actually take. The real cost shows up the first time you need care — an out-of-network specialist visit or a prescription on a high pricing tier can wipe out months of premium savings in a single claim.
Check that your doctors and prescriptions are covered before comparing prices between plans.
Going without drug coverage because you don’t take medication yet
Part D has a permanent late enrollment penalty for every month you go without “creditable” drug coverage after you’re first eligible — and it follows you for as long as you’re on Medicare. The penalty compounds the longer you wait, so a gap of just a year or two can mean paying a noticeably higher premium every month for decades afterward.
Enroll in a low-cost Part D plan even if you rarely need prescriptions now — it protects you later.
Skipping the Advantage-vs-Supplement decision until later
You typically get a one-time window with guaranteed acceptance into a Medicare Supplement plan, regardless of health history. Miss it, and insurers can ask health questions — or turn you down — if you try to switch afterward.
Compare Medicare Advantage and Medicare Supplement side by side while your enrollment window is still open.
Not double-checking that your doctors are in-network
A plan can look perfect on paper — solid premium, good drug coverage — and still force you to change doctors if your current physicians aren’t in its network. This is especially easy to overlook with Medicare Advantage plans, which typically use narrower networks than Original Medicare, and network rosters can shift from one plan year to the next even if you don’t switch plans.
Call your doctors’ offices directly, or check the plan’s provider directory, before you enroll — not after.
Assuming this year’s plan will stay the best fit next year
Medicare plans change their costs, covered drugs, and networks every single year. A plan that was the right call at 65 can quietly fall behind newer options by the time you’re 68 or 70, especially as your prescriptions or health needs change — and insurers rarely go out of their way to tell you when a competitor’s plan has become the better deal.
Revisit your coverage every fall during Open Enrollment, even if you’re happy with your current plan.
A few common questions
What happens if I miss my Initial Enrollment Period entirely?
You can still enroll during the General Enrollment Period, January through March, but coverage won’t start until July, and you may owe a late enrollment penalty on Part B for as long as you have it.
Do I need to enroll in Medicare if I’m still working at 65?
It depends on your employer’s size and your current coverage. Confirming this with HR is worth doing well before your birthday, since the wrong assumption here can be costly either way.
Can I change my mind after I enroll in a plan?
Generally yes, but only during specific windows — the Annual Enrollment Period each fall, or certain Special Enrollment Periods tied to life events. Outside those windows, changes are limited.
Should I use a licensed agent instead of comparing plans myself?
You can absolutely compare plans on your own through Medicare’s online tools, and plenty of people do. An agent doesn’t replace that option — they simply do the same comparison faster, cross-reference it against your specific doctors and medications, and don’t charge you anything to do it, since they’re paid by the insurance carrier rather than by you.
The bottom line
None of these seven mistakes are complicated once someone points them out — that’s what makes them so common. Medicare simply doesn’t come with a built-in warning system, so the responsibility for catching a missed deadline or an overlooked penalty falls on you, usually at the exact moment you have the least bandwidth to deal with it.
The fix isn’t to become a Medicare expert. It’s to start the process a few months earlier than feels necessary, ask the specific questions above before you enroll, and revisit your coverage every year instead of assuming it’s still the best fit. That’s the entire difference between people who feel blindsided by Medicare and people who feel like they’re simply making a routine decision.
If you’d rather have someone walk through your specific situation with you, a licensed agent can compare your options at no cost — before any deadline sneaks up on you.
Turning 65 is a milestone, not a test. Nobody expects you to know the difference between a Special Enrollment Period and a General Enrollment Period on your own, and you don’t have to. What matters is knowing that a few key dates and decisions exist, and giving yourself enough runway to make them on purpose instead of by accident.