Job-based insurance is insurance offered by an employer or union for current employees and family members. Job-based insurance allows you to delay Medicare enrollment. However, you may want to enroll in Medicare depending on whether your job-based insurance pays primary or secondary. In most cases, you should only delay Part B if your job-based insurance is the primary payer (meaning it pays first for your medical bills) and Medicare is secondary.
If you are eligible for Medicare due to a disability (meaning you are collecting Social Security Disability Insurance) and are covered by your, your spouse’s, or in some cases a family member’s job-based insurance, you have a Special Enrollment Period (SEP) to enroll in Part B up to eight months after you no longer have coverage from current work One of the qualifications for the Part B Special Enrollment Period is to be currently working. You are considered to be currently working as long as you have employment rights at your company even if you do not work on a regular basis, are on sick leave, are a seasonal worker, or have been temporarily laid-off. You are not considered to be currently working if you receive Social Security Disability Insurance (SSDI), have received disability benefits from your employer for more than six months, or if you receive your employer insurance through COBRA. . This means that you are not required to enroll in Part B when you first become eligible for Medicare (but you must have Part A to keep SSDI). However, remember that in most cases you should only delay Part B enrollment if your job-based insurance is the primary payer.
- Job-based insurance is primary if it is from an employer with 100+ employees. Medicare is secondary in this case, and some people choose not to enroll in Part B because of the additional monthly premium.
- Job-based insurance is secondary if it is from an employer with fewer than 100 employees. Medicare is primary in this case, and if you delay Medicare enrollment, your job-based insurance may provide little or no coverage. You should enroll in Part B to avoid incurring high costs for your care.
- If you have job-based insurance from a family member and Medicare is primary, you do not have a Part B SEP. You should enroll in Medicare as soon as you are eligible to avoid penalties and gaps in coverage Gaps in coverage are services or costs that are not covered by Original Medicare, such as vision, dental, and hearing care, as well as deductibles and coinsurance. .
Note: There are different rules if you are Medicare-eligible due to age or because you have ESRD.
To find out if your job-based insurance is primary or secondary, contact your or your spouse’s human resources department. If you plan to delay enrollment into Part B and use the SEP later, keep records of your health insurance coverage. You will be required to submit proof of your enrollment in job-based insurance when using the SEP to enroll in Part B. Proof of enrollment in job-based insurance includes:
- Written notice from your employer or plan
- Documents that show health insurance premiums paid, including W-2s, pay stubs, tax returns, and/or receipts
- Health insurance cards with the appropriate effective date
Note: If you have another form of insurance from your employer, like COBRA or retiree insurance, there are different rules for how Medicare works with your plan.