Navigating Medicare can be overwhelming, especially if you’re unfamiliar with its many rules, deadlines, and plan options. Failing to understand key aspects of Medicare can result in financial penalties, gaps in coverage, or being stuck with a plan that doesn’t fit your needs. Here are ten of the most common Medicare mistakes people make—and how you can avoid them.
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Not Enrolling on Time During the Seven-Month Birthday Window-Turning 65
One of the biggest and most costly Medicare mistakes is missing your initial enrollment period. This period spans a total of seven months—three months before the month you turn 65, the month of your 65th birthday, and three months after. Failing to enroll in Medicare Part A and/or Part B during this window can result in significant and permanent late enrollment penalties. These penalties are added to your monthly premiums and remain for the rest of your life, making it essential to sign up on time, even if you don’t need all the benefits right away. You can, however, delay Medicare if you are covered under an Employer’s Health Insurance plan or your spouse’s Employer’s Health Insurance plan as long as the employer has 20 or more employees.
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Not Enrolling in Part B After Becoming Unemployed
If you delay enrolling in Medicare Part B because you’re still working and have employer-provided health coverage, that’s fine, as long as the employer has 20 or more employees. However, once your employment (or your spouse’s) ends, you have a limited window to sign up for Part B—specifically, within eight months of losing group health coverage. Missing this special enrollment period can lead to late penalties and a delay in coverage. Even if COBRA is offered, it does not count as creditable coverage for Medicare.
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Not Enrolling in a Drug Plan (Part D)
Even if you’re not currently taking prescription medications, enrolling in Medicare Part D is highly recommended. This optional plan provides drug coverage and can prevent substantial out-of-pocket costs in the future. If you delay enrolling in Part D and don’t have other creditable drug coverage, you’ll be penalized with a higher premium when you finally do enroll. The longer you wait, the higher the penalty—so it’s best to enroll when you first become eligible, even if you choose the most basic plan.
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Not Enrolling in a Supplement or Advantage Plan
Original Medicare (Parts A and B) covers only about 80% of your medical expenses. That remaining 20% can be a major financial burden, especially if you have ongoing health needs or experience a medical emergency. To fill in these gaps, many people opt for a Medicare Supplement Plan (Medigap) or a Medicare Advantage Plan (Part C). While supplement plans help cover out-of-pocket costs like deductibles and coinsurance, Advantage plans often include additional benefits like dental, vision, hearing, and even gym memberships. Failing to enroll in either can leave you exposed to high medical bills.
What Are the Medicare Deductibles for 2025?
If you’re enrolled in Medicare, it’s important to understand what your out-of-pocket costs may look like in 2025 — starting with your deductibles.
Medicare Part B Deductible (Medical Insurance)
For 2025, the Part B deductible is $257, up from $240 in 2024 — a $17 increase.
This deductible must be met before Medicare begins paying its share for covered services. Once you’ve paid the deductible, Medicare typically covers 80% of approved costs, and you’re responsible for the remaining 20%.
Part B covers services such as:
Medicare Part A Deductible (Hospital Insurance)
The Part A deductible in 2025 is $1,676, an increase of $44 from the 2024 amount of $1,632.
This deductible applies when you are admitted to the hospital and is charged per benefit period, not annually. A benefit period begins when you’re admitted and ends once you’ve been out of the hospital or a skilled nursing facility for 60 consecutive days. This means you could pay the Part A deductible more than once in a year if you have multiple hospitalizations.
Your Part A deductible covers the first 60 days of inpatient care in each benefit period. If your hospital stay extends beyond 60 days, coinsurance charges will begin to apply starting on day 61. Days 61-90 are $419 per day, Days 91+ are $838 per day.
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Not Being Aware of Your Benefits
Many people don’t take full advantage of the benefits included in their Medicare plans. Whether it’s preventive services, wellness visits, telehealth options, or discounts on health-related services, your plan may offer more than you realize. Carefully reviewing your plan each year—and asking your broker to explain any confusing terms—can help you get the most value from your coverage.
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Not Checking Your Insurance’s Drug List (Formulary)
Medicare Part D plans have a formulary—a list of covered medications. These formularies vary by plan and are subject to change annually. If you don’t check that your prescriptions are included in your plan’s current formulary, you could end up paying more or losing coverage for a medication you need. Always review your plan’s drug list during the Annual Enrollment Period (Oct. 15 – Dec. 7) to ensure it still meets your medication needs.
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Not Checking What Doctors Are In-Network
Medicare Advantage plans have networks of doctors, hospitals, and healthcare providers. If you fail to confirm that your preferred doctor or hospital is in-network before enrolling, you may face higher costs or be unable to see your provider at all. To avoid surprises, always confirm your providers are in-network before signing up for a plan and check each year to make sure that hasn’t changed.
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Doing an Automatic Renewal Without Reviewing Changes
While automatic renewal may sound convenient, it can lead to serious issues if you don’t review your plan annually. Medicare plans can change their costs, coverage, provider networks, and drug formularies every year. By simply letting your plan renew without checking for updates, you might miss out on better coverage or lower premiums. Reviewing your options during the Annual Enrollment Period gives you the chance to make changes that better fit your evolving health needs.
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Not Considering Your Individual Needs Compared to Your Spouse
It’s common for couples to assume they should enroll in the same Medicare plan, but this can be a costly mistake. Everyone’s health needs, preferred doctors, medications, and budget differ. One spouse might need extensive prescription coverage, while the other may prioritize access to specific specialists. Medicare Advantage plans are highly individual, and you’ll get better results by choosing a plan based on your own health needs and preferences, not your partner’s.
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Not Working with a No Cost, Licensed Medicare Broker
Medicare is complicated, and trying to navigate it alone can lead to costly and avoidable mistakes. That’s why it’s wise to work with a licensed Medicare broker. Brokers help you compare plans, understand your options, and enroll in the plan that’s best suited for you. And the best part? Their services are completely free to you. Patricia Saint Louis, RN is a licensed Medicare broker, providing expert guidance and personalized support. She is licensed in multiple states, including Florida, Georgia, Michigan, North Carolina, Ohio, Pennsylvania, Texas, Tennessee, New Jersey, Virginia, Louisiana, Maryland, and Washington state.
Conclusion
Avoiding these ten Medicare mistakes can save you money, time, and stress. By planning ahead, staying informed, and getting professional help when needed, you’ll set yourself up for long-term healthcare success. Medicare doesn’t have to be overwhelming—with the right guidance, it can be a powerful tool to protect your health and finances.
