Selecting the wrong Medicare plan can result in surprise out-of-pocket costs and limited access to care.
The most costly errors include:
1. Focusing Only on the Premium
It is easy to be drawn to $0 or low-premium plans, but this is a major trap. A low premium often means higher deductibles, copays, and coinsurance. Always evaluate the maximum out-of-pocket limit to ensure you can afford the medical care you need.
2. Assuming Your Doctors Are Covered
Provider networks can change every year. Assuming your current primary care physicians or specialists will accept a new plan can result in unexpected out-of-network bills. Always use your plan's online directory to confirm your providers are in-network before enrolling.
3. Ignoring Prescription Drug Formularies
Not all plans cover the same medications, and the amount you pay for your prescriptions will vary by plan. Drug formularies (the list of covered drugs) and pharmacy tiers can change annually. Check your plan's formulary and confirm that your pharmacy is in-network to avoid expensive surprises at the checkout counter.
4. Copying a Friend's or Spouse's Plan
Choosing a plan based on a recommendation from a friend or relative is a mistake because no two people have the exact same medical needs or budget. A plan that works for them may leave you paying out-of-pocket for your specific prescriptions or specialist visits.
5. Missing Key Enrollment Deadlines
Failing to sign up for Medicare at the proper time can result in permanent late enrollment penalties. For those turning 65, the Initial Enrollment Period (IEP) lasts for seven months. Missing deadlines can also restrict when you can switch to a plan that better suits your health needs.
How working with an independent Medicare professional team like Medicare University can help you avoid these costly mistakes:
1) We help you calculate your 1. Calculate Your "Total Cost"
Look past premiums: Add the monthly premium to the annual deductible and your estimated co-pays.
Check the safety net: Identify the plan's Maximum Out-of-Pocket (MOOP) limit.
Plan for worst-case scenarios: Choose a plan with a MOOP you can comfortably afford if you face a serious illness.
2. Verify Provider Networks Every Year
Call your doctors directly: Ask their billing department, "Do you accept this specific Medicare Advantage plan network?"
Do not just trust the directory: Insurance directories can be outdated; direct confirmation is safest.
Consider Original Medicare: If you travel frequently or have multiple specialists, Original Medicare with a Medigap policy allows you to see any doctor in the U.S. who accepts Medicare.
3. Run Your Prescriptions Through the Plan Finder [1]
Use the official tool: Log into Medicare.gov and type in your exact medication names and dosages.
Check the tiers: Ensure your drugs are not placed on a high-cost specialty tier.
Match your pharmacy: Verify if your preferred pharmacy is labeled as "preferred mail-order" or "preferred retail" to get the lowest co-pays. [1]
4. Build a Plan Based Only on Your Personal Needs [1]
Ignore neighbors and ads: Disregard celebrity TV commercials and what works for your friends.
Audit your own health: Base your decision strictly on your own medical history, upcoming surgeries, and current prescriptions.
Separate from your spouse: Recognize that you and your spouse may need entirely different plans. [1, 2, 3]
5. Mark Enrollment Deadlines on Your Calendar [1]
Track your IEP: If you are turning 65, your Initial Enrollment Period is a strict 7-month window (3 months before your birthday month, your birthday month, and 3 months after).
Understand work coverage: If you work past 65, confirm with your HR department if your employer group coverage is considered "creditable" to avoid late penalties later.
Set an annual reminder: Mark October 15 to December 7 on your calendar every year for the Annual Election Period to review changes to your existing plan. [1, 2]
If you would like to start mapping out your specific timeline, let me know when you turn 65 or if you plan to keep working past 65. I can give you the exact dates for your personal enrollment windows.
9 sites
The 10 Biggest Medicare Mistakes That Could Cost You
Jun 4, 2026 — We tell our clients to set aside one evening every November to log in to Medicare. gov's Plan Finder, plug in current prescription...
Vision Retirement
How to Avoid the Medicare Part D Donut Hole
Nov 25, 2021 — Make sure that all your current medications are included, and pay attention to the tier they are placed in. Drugs placed in higher...
The Medicare Family
Top 5 Financial Mistakes Pilots Make and How to Avoid Them
Jan 7, 2026 — Financial planning is like medical treatment: what works for one person could be harmful to another. A personalized plan tailored ...
Wiser Wealth Management
Show all
If you would like to start mapping out your specific timeline, let me know when you turn 65 or if you plan to keep working past 65. I can give you the exact dates for your personal enrollment windows.
Our Approach
We're a team of passionate thinkers and doers, dedicated to building with purpose and clarity. Collaboration and curiosity drive everything we do. Our process is simple, thoughtful, and designed with your experience in mind. We believe great results come from clear steps, open collaboration, and a shared sense of purpose.
Our process is simple and thoughtful.
Explore our range of services designed to help you move forward with confidence, wherever you're headed next.
In-person and remote options
Our office is conveniently located in Manhattan. A place to gather, grow, and reconnect.
Our Services
Explore our range of services designed to help you move forward with confidence, wherever you're headed next.
Meet the Team

