Medicare and Employer Coverage

Medicare and employer health coverage are two primary sources of health insurance for many Americans. Understanding how these two types of coverage interact is crucial for maximizing benefits and ensuring that healthcare needs are comprehensively met.

Things to keep in mind:

If you are currently actively employed with an employer who has 20 or more employees, and are covered under that employer’s insurance, you can likely delay Medicare past 65 without a penalty as long as the coverage offers at least as much coverage as Medicare.

If you work for an employer with fewer than 20 employees and are covered under the employer health plan, then Medicare will be primary, and the employer plan will be secondary.

COBRA and Retiree coverage does not count as credible coverage. If you are on COBRA

Coordination of Benefits

When an individual is eligible for both Medicare and employer health coverage, coordination of benefits determines which insurance pays first. This depends on several factors, including the size of the employer and the individual's employment status.

Medicare as Primary Payer

Medicare is the primary payer in the following situations:

  • If the individual is 65 or older and works for an employer with fewer than 20 employees.
  • If the individual is under 65 and eligible for Medicare due to disability, and works for an employer with fewer than 100 employees.
  • If the individual has End-Stage Renal Disease (ESRD) and is past the 30-month coordination period.

Employer Coverage as Primary Payer

Employer coverage is the primary payer in the following situations:

  • If the individual is 65 or older and works for an employer with 20 or more employees.
  • If the individual is under 65 and eligible for Medicare due to disability, and works for an employer with 100 or more employees.
  • If the individual has End-Stage Renal Disease (ESRD) and is within the first 30 months of Medicare eligibility.

Making Enrollment Decisions

Deciding whether to enroll in Medicare while having employer coverage depends on several factors, including current health needs, costs, and future plans.

Enrollment in Medicare Part A

Most individuals choose to enroll in Medicare Part A when they first become eligible, as it usually does not have a premium if the individual or their spouse has paid Medicare taxes  for at least 10 years. Enrollment in Part A can serve as secondary coverage to employer  insurance. 

Delaying Enrollment in Medicare Part B

Individuals with existing employer coverage may delay enrolling in Medicare Part B to avoid paying the premium, especially if the employer coverage is comprehensive. However, it is important to understand the implications of delaying Part B enrollment, as it may affect future coverage and lead to penalties.

Medicare Part D and Employer Prescription Coverage

If the employer coverage includes prescription drug benefits that are considered "creditable," meaning they are at least as good as Medicare Part D coverage, the individual can delay enrolling in Part D without penalty. However, it is crucial to receive and keep records of the creditable coverage notice from the employer.

Special Enrollment Periods

Individuals who delay enrolling in Medicare due to having employer coverage can qualify for a Special Enrollment Period (SEP) when their employment or employer coverage ends. This SEP allows them to enroll in Medicare Part B and Part D without facing late enrollment penalties.

Impact on Spouses

The coordination of benefits between Medicare and employer coverage also affects spouses. If the working spouse has employer coverage and the other spouse is eligible for Medicare, the employer plan may cover both individuals. The coordination rules will depend on the size of the employer and the Medicare eligibility of each spouse.