Here are five of the most common Medicare enrollment mistakes—and how you can avoid them.


1. Missing Your Initial Enrollment Period (IEP)

Your Initial Enrollment Period is a 7-month window around your 65th birthday (3 months before, your birthday month, and 3 months after).

Missing this window can result in:

  1. Late enrollment penalties
  2. Delayed coverage

If you’re still working, make sure you understand how your employer coverage affects your Medicare timing.


2. Not Enrolling in Part D (Prescription Drug Coverage)

Even if you don’t take medications now, skipping Part D can lead to a permanent penalty if you enroll later.

Enrolling when first eligible helps you avoid unnecessary costs in the future.


3. Choosing a Plan Based Only on Premium

A low—or $0—premium plan isn’t always the best choice.

Be sure to consider:

  1. Copays and coinsurance
  2. Provider networks
  3. Maximum out-of-pocket costs

The right plan should fit your overall healthcare needs, not just your monthly budget.


4. Not Checking Doctor and Medication Coverage

Not all plans cover the same doctors or prescriptions.

Before enrolling, confirm:

  1. Your doctors are in-network
  2. Your medications are covered

Skipping this step can lead to unexpected costs or having to switch providers.


5. Not Reviewing Your Plan Each Year

Medicare plans change annually, including coverage, costs, and provider networks.

If you don’t review your plan during the Annual Enrollment Period, you could end up paying more or losing coverage for needed services.


Medicare isn’t one-size-fits-all. Taking time to understand your options—and reviewing them regularly—can help you avoid costly mistakes and choose coverage that fits your needs.


If you’d like help reviewing your options, working with a licensed professional can make the process easier and more confident.