Turning 65 in Anthem: the window that matters, and the one that never comes back

The mail starts about four months before your birthday, and it does not stop. Glossy envelopes with a return address you half recognise. Phone calls from numbers in area codes you have never visited. Somewhere in that pile are two or three things that genuinely matter, and the rest is noise designed to look exactly like them.

So let us get the two things that matter out of the way first.

Window one: the seven months everybody talks about

Your Initial Enrollment Period runs seven months. Three months before the month you turn 65, the month itself, and three months after. This is when you sign up for Part A and Part B, and almost every piece of mail you receive will be about it.

Two details inside it are worth more than the rest of the pile combined.

Enrolling early changes your start date. Sign up during the three months before your birthday month and your coverage begins on the first day of your birthday month. Sign up during your birthday month or later and the start date slides — you can end up with weeks of gap you did not plan for. There is no advantage whatsoever to waiting, and a real cost to it.

If you were born on the first of a month, everything shifts. Medicare treats you as attaining 65 in the previous month. Your whole seven-month window moves a month earlier, and so does every downstream date. This catches people out constantly, including people who thought they had read up on it.

You can check both against your own birthday with the enrollment window checker — it does the arithmetic, including the born-on-the-first rule.

Window two: the six months nobody mentions

Here is the one that does not appear in the glossy envelopes.

Your Medigap open enrollment period starts on the first day of the month in which you are both 65 and enrolled in Part B, and it runs six months. During those six months, no Medicare Supplement carrier can refuse you coverage or charge you more because of your health. Not for your diabetes, not for your heart history, not for the thing your doctor is still investigating.

After those six months, in Arizona, they can. Carriers are permitted to medically underwrite a Medigap application, and they do. A diagnosis that arrives between now and then can close a door that is standing wide open today.

This window does not come back. There is no annual do-over, no special period that restores it. It happens once.

That is the whole reason I push people to decide between the two structures — Advantage or Supplement — during this window rather than after it. Not because a Supplement is better; often it is not. Because the choice is genuinely free right now and it may not be later, and it is worth making the decision while both doors are open rather than discovering one has shut.

What you are actually choosing between

Once you have Part A and Part B, you pick one of two structures.

A Medicare Advantage plan delivers your Part A and Part B benefits through a private plan, usually with drug coverage built in, often with dental, vision and hearing attached. Lower monthly cost, a network to work within, copays as you go, and an annual cap on what you can be asked to spend.

A Medicare Supplement plus a Part D plan keeps you on Original Medicare and adds a Medigap policy to cover what Medicare leaves behind, plus a standalone drug plan. Higher monthly premium, almost no surprises, and no network at all — any provider who accepts Medicare accepts you.

Neither is the right answer in general. The right answer depends on things a brochure cannot know: whether your cardiologist is in a particular network, whether you spend three months a year in Michigan, whether your medication list happens to sit awkwardly on one plan’s formulary. The comparison is here if you want the structural version, and the plan type finder will tell you which way your own answers point.

The penalties, said plainly

These get waved around as scare tactics, which is a shame, because they are real and worth understanding accurately.

Part B. If you could have enrolled and did not, you pay an extra 10% on your Part B premium for every full twelve months you delayed — for as long as you have Medicare. Not for a year. Permanently.

Part D. If you go more than 63 days without creditable drug coverage after your Initial Enrollment Period, a surcharge is added to your Part D premium based on how many months you went without. Also permanent.

Both are waived if you had employer coverage through active employment. This is the important exception. If you or your spouse are still working and covered by that employer’s group plan, you can generally delay Part B without penalty, and you get an eight-month Special Enrollment Period once that employment ends.

Two cautions on that exception, because both bite people:

• Retiree coverage and COBRA do not count. They are not active employment. The clock runs anyway, and people find out eighteen months later.
• If the employer has fewer than 20 employees, Medicare usually becomes the primary payer at 65 whether you enrolled or not — which means delaying leaves you effectively uninsured for the portion Medicare would have paid. Confirm with your benefits administrator before relying on it.

What to have ready

Whether you talk to me or to somebody else, the conversation goes better with four things in hand:

1. Your prescriptions, with dosages. Not “a blood pressure pill” — the name and the milligrams. Tiers are drug-specific and dose-specific.
2. Your pharmacy. Preferred pharmacy networks change drug costs more than people expect.
3. Every doctor you want to keep, by name. Including the specialist you see once a year. That one is usually the one that eliminates a plan.
4. Anything scheduled in the next twelve months. A knee replacement changes which structure wins by a wide margin.

With those four things, one twenty-minute conversation does the work of three vague ones.

Where to start

If your birthday is more than six months out, you have time and you should use some of it — not to decide, but to work out which structure you want before the seven-month scramble starts.

If it is closer than that, the Medigap window is the thing to think about first, because it is the only part of this that expires permanently.

And if it has already passed and you are reading this with a sinking feeling: it is almost always fixable. Later than ideal is not the same as too late, and the General Enrollment Period exists for exactly this. Call and let us work out where you actually stand rather than guessing.