Does Employer Size Matter for Medicare? Yes — Here's Why
Yes. If your employer has 20 or more employees, the employer plan is generally primary and you can defer Part B enrollment while actively working. If your employer has fewer than 20 employees, Medicare is primary and you should enroll in Part B when first eligible.
Frequently Asked Questions
- What if my employer has exactly 20 employees?
- An employer with 20 or more employees is considered a large employer for Medicare purposes. The employer plan pays first.
- Does this apply to part-time employees too?
- The 20-employee count typically includes all employees, but the coverage must be based on your active employment to qualify for delayed Part B enrollment.
- What if I'm not sure how many employees my company has?
- Ask your HR department or benefits administrator. The distinction between under 20 and 20+ significantly affects your Medicare obligations.