Written by Danielle K Roberts,
Working past 65? Learn when you can delay Medicare Part B, how COBRA and HSAs affect timing, and how to avoid late enrollment penalties.
Turning 65 does not always mean that Medicare Part B should be started immediately. For healthcare professionals who continue working beyond 65, knowing when Part B is required and when it can be delayed is important. The Boomer Benefits’ Medicare Part B guide can help clarify whether someone needs Part B based on their current coverage, employment situation, and Medicare eligibility.
What Does Medicare Part B Actually Cover?
Medicare Part B is one of two parts of Original Medicare. While Part A generally covers inpatient hospital care, Part B helps pay for outpatient services, such as doctor visits, outpatient care, preventive care, durable medical equipment, and other medically necessary services.
Most people will pay a monthly premium for Medicare Part B, which is one reason some people who are still working may decide to go past their Initial Enrollment Period and enroll later. The choice depends largely on what other health coverage they have.
For healthcare professionals, this distinction can be particularly relevant. Physicians, nurses, therapists, administrators, and other healthcare workers may continue practicing well beyond 65 and remain covered by an employer health plan. Their Medicare decisions may look very different from someone who retires at 65 and has no other employer coverage.
How Working Past 65 Changes the Enrollment Decision
Someone who has health insurance through their own or their spouse’s current employment may be able to delay Part B without incurring a late enrollment penalty. However, the type of employer coverage and the size of the employer matters.
Check with the employer’s benefits administrator before deciding whether you can postpone enrollment without consequences. In some situations, job-based coverage may not pay properly if an eligible employee does not have Medicare Part A and Part B.
This is especially important for professionals who work for smaller practices, medical groups, or other organizations. Do not assume that having an employer health plan automatically means delaying Medicare.
The safest approach is to ask the benefits administrator how the employer plan coordinates with Medicare and whether the employee is expected to enroll in Original Medicare.
What Happens When Employer Coverage Ends?
If someone delayed Part B because they or their spouse continued working and had qualifying employer group health coverage, they typically qualify for an eight-month Special Enrollment Period after the employment or group health coverage ends, whichever comes first. This allows them to enroll in Part B without a late enrollment penalty.
However, waiting until the last minute can create unnecessary problems. Someone who wants Medicare to begin immediately after employer coverage ends may need to submit their enrollment paperwork before that coverage terminates.
Don’t Assume COBRA Extends Your Medicare Deadline
COBRA can create confusion because it allows someone to temporarily continue employer health insurance after leaving a job. But COBRA does not extend the eight-month Special Enrollment Period for Part B.
Medicare specifically advises people not to wait until COBRA coverage ends before enrolling in Part B. If someone is already eligible for Medicare, COBRA generally does not give them additional time to delay Medicare enrollment without consequences. COBRA is also not considered creditable for Part B, meaning they can refuse to pay since Medicare is supposed to be primary.
This is an easy detail for family members to overlook, particularly when they are focused on maintaining uninterrupted health coverage during a retirement transition.
Retiree Coverage Is Different From Current Employer Coverage
Another common source of confusion is retiree insurance.
Coverage offered by a former employer or union does not work the same way as active insurance from current employment. Often, retiree coverage may require someone to have both Medicare Part A and Part B before the retiree plan will pay its share of medical expenses.
If someone is approaching Medicare eligibility, they should ask the plan administrator exactly how the coverage coordinates with Medicare. Some people assume that retiree insurance will replace Medicare, so they choose not to enroll to avoid the Part B monthly premium. However, doing so can result in potential financial consequences and a gap in coverage.
Healthcare Professionals Should Watch Their HSA, Too
Healthcare professionals who remain employed and contribute to a Health Savings Account have another consideration when approaching Medicare.
Once someone enrolls in Medicare, HSA contribution rules can become an issue. People with an HSA need to coordinate the timing of their Medicare enrollment and HSA contributions carefully. Once enrolled in Medicare, you can no longer contribute to an HAS, or you risk an IRS penalty. So, timing matters. In particular, people approaching retirement at 65 or applying for Social Security should understand the potential consequences of being auto-enrolled in Part A.
If you are past 65, make sure you stop HSA contributions at least 6 months before enrolling in any part of Medicare. You can discuss the transition with a qualified tax professional and your benefits administrator before making decisions.
What If Someone Misses Their Initial Enrollment Period?
People who do not have qualifying employer coverage should not assume they can simply enroll in Part B whenever they please.
The Initial Enrollment Period generally surrounds the month someone turns 65. If they miss that window and do not qualify for a Special Enrollment Period, they may have to wait for the General Enrollment Period, which runs annually from January 1st to March 31st. Waiting until the General Enrollment Period can mean they may also face a late enrollment penalty that can continue for as long as they have Part B.
That potential delay is why it is better to determine eligibility and enrollment timing before turning 65 rather than trying to correct a missed deadline afterward.
A Simple Medicare Part B Checklist
Medicare enrollment is rarely a one-size-fits-all decision, particularly for people who continue working after 65. Taking time to verify how current insurance coordinates with Medicare can help prevent coverage gaps, unexpected bills, and late-enrollment penalties.
For healthcare professionals who spend their careers helping others, helping themselves by navigating their own Medicare transition with care can make all the difference when entering retirement.
Author’s Bio
Danielle K Roberts is the co-founder of Boomer Benefits who writes regularly for and is cited by many online publications. A TCU journalism graduate and former magazine editor, she enjoys sharing her Medicare knowledge online.
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