Losing Your Work Coverage? Here's How to Move to Medicare Without Penalties or Gaps

When your employer health insurance ends — whether you're retiring, leaving a job, or aging off a group plan — Medicare has a specific window that lets you enroll without a late penalty. Miss it, and the consequences follow you for years. We help Michigan residents navigate this transition cleanly, so nothing falls through the cracks.

What Changes When Your Employer Coverage Ends

Losing employer coverage is one of the most common reasons people come to us outside of the standard enrollment season. It triggers what Medicare calls a Special Enrollment Period (SEP) — a protected window that gives you time to sign up for Medicare without the late-enrollment penalties that apply when you miss your Initial Enrollment Period.

 

The SEP is not automatic. You have to act, and the clock starts the moment your employer coverage ends. Most people have eight months to enroll in Medicare Part A (hospital insurance) and Part B (medical insurance) after losing their group coverage — but the rules around Part D (prescription drug coverage) and Medicare Advantage(Part C) follow slightly different timelines. Getting the sequence right matters.

The Five Situations We See Most Often

Understanding which situation applies to you determines exactly which steps to take and in what order.

You're Retiring at 65 or Older

If you're leaving a job at 65 or beyond and your employer coverage ends when you retire, your Special Enrollment Period begins on that last day of coverage. You have eight months to enroll in Parts A and B. Most people in this situation also need to choose a Medicare Supplement (Medigap) plan or a Medicare Advantage plan to cover what Original Medicare doesn't — and that decision has its own timing considerations.

You're Already Past 65 and Still Working

Some people delay Medicare enrollment because they're still covered by an employer plan past their 65th birthday. That's allowed — and it's called having creditable coverage. Creditable coverage means your employer plan meets Medicare's minimum standard, so your delayed enrollment is protected. When that coverage ends, your SEP kicks in. The key is documenting this properly, which is where the CMS-L564 form comes in.

You're Covered Under a Spouse's Employer Plan

If your health insurance has been coming through your spouse's job rather than your own, the same rules apply. When that coverage ends — because your spouse retires, loses their job, or the plan changes — you qualify for a Special Enrollment Period. We see this situation often, and it catches people off guard because they weren't the policyholder.

You're Considering COBRA Instead of Medicare

COBRA (Consolidated Omnibus Budget Reconciliation Act) lets you continue your employer coverage temporarily after leaving a job, but it does not count as creditable coverage for Medicare purposes. If you take COBRA and delay Medicare enrollment past your eight-month SEP window, you may face a permanent late-enrollment penalty on Part B. COBRA can make sense in limited situations, but it should never be used as a reason to postpone Medicare without understanding the penalty risk first.

You're Losing Retiree Coverage or Union Coverage

Some retirees carry employer-sponsored retiree health benefits after they leave the workforce. If that coverage ends — because the plan is discontinued, your employer changes terms, or you lose eligibility — you may qualify for a Special Enrollment Period depending on the type of plan. These situations can be more complicated to evaluate, and getting the wrong answer can be costly.

The CMS-L564: The Form That Protects You

When you enroll in Medicare through a Special Enrollment Period after losing employer coverage, Social Security will ask you to prove that your delayed enrollment was covered by a qualifying employer plan. The form they use is called the CMS-L564 — the Request for Employment Information.

 

Your employer completes Section B of this form. You submit it along with your Medicare enrollment application (Form CMS-40B for Part B). Without it, Social Security may not recognize your SEP, and you could be assessed a late-enrollment penalty even though you were legitimately covered. We walk every client through this process so the paperwork gets done right the first time.

Talk to Us Before Your Coverage Ends

What Coverage You'll Need to Replace

Original Medicare — Parts A and B — covers a significant portion of your medical costs, but it doesn't cover everything. Most people transitioning off employer coverage need to add at least one more layer of protection.

 

Your options fall into two categories. A Medicare Supplement plan (also called Medigap) works alongside Original Medicare to cover out-of-pocket costs like copays, coinsurance, and deductibles. A Medicare Advantage plan (Part C) replaces Original Medicare with a private plan that typically includes prescription drug coverage and may include dental, vision, and hearing benefits. Both approaches have real tradeoffs around cost, network access, and flexibility. We compare both for every client based on their specific doctors, prescriptions, and budget — not a general recommendation that fits everyone.

Why Timing This Correctly Saves You Money for Years

Late-enrollment penalties for Medicare Part B are not a one-time fine. They're a permanent increase to your monthly premium — 10% added for every 12-month period you were eligible but not enrolled. For Part D prescription drug coverage, the penalty is similarly permanent and calculated based on how long you went without creditable drug coverage.

 

These penalties are avoidable when you act within your Special Enrollment Period and document your prior coverage correctly. We've helped many Michigan residents who came to us after being assessed a penalty they didn't know was coming. We'd much rather help you avoid it entirely.

Common Questions About Losing Employer Coverage

  • How long do I have to enroll in Medicare after losing employer coverage?

    In most cases, you have eight months from the date your employer coverage ends to enroll in Medicare Part A and Part B without a late penalty. This window is called the Special Enrollment Period. Part D and Medicare Advantage plans have a separate two-month enrollment window, so acting promptly after your coverage ends is important.

  • Does COBRA count as creditable coverage for Medicare?

    No. COBRA continuation coverage does not count as creditable coverage for Medicare purposes. If you delay Medicare enrollment and rely on COBRA, you may still face a late-enrollment penalty when you eventually sign up for Part B or Part D. COBRA can be a useful short-term bridge in specific situations, but it should never be used to postpone Medicare without understanding this risk.

  • What is the CMS-L564 form and do I need it?

    The CMS-L564 is the form Social Security uses to verify that your delayed Medicare enrollment was protected by qualifying employer coverage. Your employer completes part of the form, and you submit it with your Part B enrollment application. If you're enrolling through a Special Enrollment Period after losing group coverage, you will almost certainly need this form to avoid being assessed a late-enrollment penalty.

We've Helped Michigan Residents Through This Transition for Over 25 Years

As an independent broker, we're not tied to any single insurance carrier. We shop the full market on your behalf — Medicare Advantage plans, Medigap policies, and Part D drug plans from every carrier available in your area — and we help you choose based on your doctors, your prescriptions, and your budget. Richard Duffield has worked in insurance for more than 25 years, and Medicare transitions are among the most time-sensitive situations we handle. If your employer coverage is ending soon, the best time to call is before it does.

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