What is the most common mistake people make when first getting Medicare?

Quick Answer

The most common mistake is missing the Initial Enrollment Period and enrolling late, which can trigger permanent late penalties and gaps in coverage. Many people don't realize they need to actively sign up for Parts A and B, even if they're already receiving Social Security benefits.

Detailed Explanation

Most people assume Medicare enrollment is automatic. Sometimes Part A is, but Part B almost never is, and the rules depend on your specific situation. If you're not receiving Social Security benefits when you turn 65, you have to actively sign up. Miss the window, and you could face a late enrollment penalty on your Part B premium that follows you for life.The Initial Enrollment Period is a seven-month window: three months before your 65th birthday month, your birthday month itself, and three months after. People often think they have until they actually need care to enroll. That's not how it works.The second most common mistake is assuming that staying on an employer plan protects you from penalties. It often does, but only if that employer coverage qualifies under Medicare's rules. Coverage through a small employer or COBRA does not count as qualifying coverage. Many people are surprised to learn this after the fact.A third mistake is skipping Part D (prescription drug coverage) because you don't take any medications right now. If you go without creditable drug coverage and later want to enroll, you'll face a late penalty added to your premium every month going forward.The good news is that these mistakes are avoidable with a little planning. Talk to someone who knows Medicare before you turn 65, not after.

How This Applies in Utah

Utah's ADRC counselors offer free one-on-one help for people approaching Medicare eligibility. They can review your specific situation and help you avoid enrollment mistakes before they happen. Contact your local ADRC through utahaging.org.

What This Means For You

For you, this means the time to learn about Medicare is several months before you turn 65, not the week your coverage starts.

Disclaimer

How Resting Sycamore Advisors Uses CMS Data

Our Commitment to Reliable Medicare Information

At Resting Sycamore Advisors, we work to provide accurate, current, and trustworthy information about Medicare Advantage, Medicare Part D, and Special Needs Plans.

To do that, we use data published by the Centers for Medicare & Medicaid Services (CMS), which is the official source for Medicare plan and enrollment information.

CMS Data Sources We Rely On

Our Medicare plan pages and comparison tools are powered by CMS datasets, including:

  • Medicare Advantage and Part D Landscape Files for annual plan availability and benefit details
  • Plan Benefits Package (PBP) Files for detailed benefit and coverage information
  • Part C and Part D Performance Data for quality ratings and plan performance measures
  • Monthly Enrollment Data for enrollment counts by contract, plan, state, and county

When possible, we link to the original CMS resources so you can review the source material directly.

How Often We Update Our Data

We follow the CMS release schedule and update our website as new data becomes available.

Annual Plan Year Updates (September)

We load new plan year Landscape and PBP files before the Medicare Annual Enrollment Period (October 15 through December 7). We also monitor CMS.gov for updates or revisions and refresh our content when needed.

Mid-Year Updates

We update enrollment and performance data as CMS publishes revised files, which are typically released monthly or quarterly.

Ongoing Maintenance

We routinely monitor CMS announcements for corrections, reissued files, or other changes and update our pages accordingly.

Each plan page includes a Last Accessed date so visitors can see when the source information was most recently reviewed.

How We Prepare CMS Data for Our Website

CMS data can be difficult to read in raw form. To make it easier to use, we format and organize the data for clarity.

This includes:

  • Standardizing plan identifiers such as contract ID, plan ID, and segment
  • Normalizing terminology so common Medicare terms are presented consistently
  • Organizing plan information by state, county, and ZIP code to match how people shop for coverage

All data values come from CMS. We do not change the underlying values beyond formatting, organization, and presentation.

Version Tracking and Transparency

We keep internal records of the CMS dataset versions used on our site.

Major Version History

  • Current Version: CY2025 Medicare Advantage and Part D Landscape Files (v1.0, published October 2025)
  • Prior Version: None. Resting Sycamore Advisors first began publishing structured Medicare plan information in March 2025

If CMS issues corrected or revised files, we update our website to reflect the latest available version.

Important Limitations

Please keep the following in mind:

  • CMS is the official source of truth. For enrollment and coverage decisions, always confirm details with Medicare.gov or 1-800-MEDICARE.
  • Data timing can vary. Enrollment and performance updates may appear on our website a few weeks after CMS publishes changes.
  • Plan details can change. Plan availability, costs, and benefits may change. Always verify current details directly with the plan provider.

Need Help From Official Medicare Resources?

For personalized Medicare assistance, please use these official resources:

  • Medicare.gov Help Center — https://www.medicare.gov
  • 1-800-MEDICARE (1-800-633-4227) TTY: 1-877-486-2048
  • State Health Insurance Assistance Program (SHIP) — free local counseling for Medicare beneficiariesIf you want, I can also give you a shorter legal-style version for a footer or /disclaimer page summary.