Turning 65 doesn’t always mean you must leave your employer’s health plan or immediately enroll in every part of Medicare. The right timing depends on where your coverage comes from, the size of the employer, prescription drug coverage, and whether you contribute to a Health Savings Account (HSA).

Start With Your Employer Coverage

If you or your spouse are still actively working and you’re covered by that employer’s group health plan, you may be able to delay Medicare Part B without a late-enrollment penalty. This generally applies to coverage based on current employment—not retiree insurance or COBRA.

Employer size matters. If the employer has 20 or more employees, the employer plan generally pays first and Medicare pays second. If the employer has fewer than 20 employees, Medicare generally pays first, so delaying Medicare could leave gaps in coverage.

Before making a decision, ask the employer’s benefits administrator whether the plan requires you to enroll in Medicare at 65 and whether its prescription coverage is considered creditable.

What About Medicare Part A?

Many people qualify for premium-free Part A and consider enrolling at 65 even while working. However, there is an important exception if you or your employer contribute to an HSA.

Once you’re enrolled in any part of Medicare, you can no longer contribute to an HSA. If you enroll in premium-free Part A after age 65, your coverage may begin retroactively—generally up to six months, but not before the month you first became eligible. That makes advance planning especially important.

When Can You Enroll Later?

If you qualify based on current employer coverage, you can generally enroll in Part B while you’re still covered or during an 8-month Special Enrollment Period after the employment or employer coverage ends, whichever happens first.

COBRA does not extend that 8-month Part B enrollment window. Waiting until COBRA ends could result in a coverage gap or late-enrollment penalty.

Three Questions to Ask Before You Decide

1. Is my coverage based on my or my spouse’s current employment?
2. Does the employer have 20 or more employees?
3. Do I contribute to an HSA or need to protect future HSA eligibility?

You can also review Medicare’s official guidance on working past 65 and when you can enroll.

Have Questions About Your Timing?

Medicare enrollment decisions can affect your coverage, costs, and future options. I’m available to help you review your situation and understand the questions to ask before you enroll.

Joseph V. Lombardo
Independent Insurance Agent
📞 (718) 207-9276
✉️ jvlombardo@jvlombfinancial.com
🌐 jvlombardo.com

This information is for educational purposes and is not a substitute for guidance from Medicare, Social Security, your employer’s benefits administrator, or a tax professional. Medicare rules and individual circumstances may vary.