Spouse's Under-20 Plan and Social Security: Enroll in Part B Now
You should enroll in Part B during your Initial Enrollment Period at 65. A spouse's employer with fewer than 20 employees means Medicare is primary at 65, regardless of whether Social Security has already started or whether your spouse is still working. Delaying Part B risks a permanent late-enrollment penalty and denied outpatient claims.
Frequently Asked Questions
- Does Social Security starting mean Medicare Part B started automatically?
- Medicare Part A and Part B are usually activated automatically at 65 if you are already receiving Social Security. However, you can decline Part B. If you declined Part B because you thought your spouse's employer plan was sufficient, and that employer has fewer than 20 employees, you should reconsider — that plan is secondary to Medicare, not primary.
- Can a spouse's active employment protect me from a Part B penalty if the employer has under 20 employees?
- No. The employer-size rule overrides spousal employment status. With fewer than 20 employees, Medicare is primary at 65 regardless of whether your spouse is actively working. The Part B late-enrollment penalty accumulates from your Initial Enrollment Period.
- What if I already missed enrolling in Part B?
- If your Initial Enrollment Period has closed and no SEP applies, you can enroll during the General Enrollment Period (January 1 through March 31 each year). Coverage starts the month after you sign up, and a permanent penalty applies for each full 12-month period since your IEP that you were eligible but not enrolled.