Every fall, Medicare opens a window that lets you change your coverage for the year ahead — and every fall, a lot of people let it pass without a second thought. Here's what it actually covers.
When It Happens
The Annual Enrollment Period runs October 15 through December 7 each year, without exception. Changes made during this window take effect January 1 of the following year.
What You Can Actually Change
During AEP, you can switch from Original Medicare to a Medicare Advantage plan, switch back from Medicare Advantage to Original Medicare, move from one Medicare Advantage plan to another, or change your Part D prescription drug plan. It's the one guaranteed window each year to make these changes without needing to qualify for a special circumstance.
Why Review Every Single Year — Even If You're Happy
This is the part people miss. Plans aren't static. Insurance companies can adjust premiums, provider networks, and drug formularies (the list of medications a plan covers and at what cost) every year. A plan that was the best fit for you last year can quietly become a worse deal this year — sometimes because your own health or medications changed, sometimes because the plan itself changed around you.
Skipping your annual review doesn't keep things the same. It just means you find out about changes when you try to fill a prescription or see a doctor, instead of finding out in November when you could still do something about it.
Quick Takeaways
- AEP runs October 15 – December 7 every year. Changes take effect January 1.
- You can switch Medicare Advantage plans, switch to/from Original Medicare, or change your Part D plan.
- Plans change their costs, networks, and drug coverage annually — even if you don't switch anything, it's worth checking.
- If you take no action, you generally stay on your current plan as-is into the new year.
What Happens If You Do Nothing
If you don't make a change, you typically stay enrolled in your current plan. That's fine if you've actually confirmed it's still your best option — it's a problem if you're assuming it is without checking.
Is your plan still the right fit?¿Su plan sigue siendo el adecuado?
Let's review your current coverage before AEP closes.Revisemos su cobertura actual antes de que cierre el AEP.
Review My PlanRevisar Mi PlanYou'll be securely connected to our licensed enrollment partner for the next step.Será conectado de forma segura con nuestro socio de inscripción licenciado para el siguiente paso.