Some individuals, maybe even you, will still be actively employed upon becoming eligible for Medicare. Can you enroll in Medicare while you’re still in the work force, and if not, will you get a penalty?
If the employer has fewer than 20 employees, you’ll probably want to enroll in Parts A, B, and D upon becoming eligible for them. In this situation, Medicare usually becomes your primary coverage. If the employer has 20 employees or more, you may want to delay Parts A, B, and/or D if you have sufficient group coverage and know you won’t incur late enrollment penalties. Medicare usually pays second to group coverage from larger employers.