Do I Need Medicare Part B If I Have Other Insurance? 
If you are still working after you turn 65 -LRB- or your spouse is still working -RRB- for a company with 20 or more full-time workers and you get health insurance from them , you may not need to enroll in Medicare when you turn 65 . You can delay Part B and Part D and get them later on when you retire or if you lose your job-related insurance . You can enroll in Part A because it is free but it probably wont pay much towards your healthcare cost because Part A pays after your job insurance . Talk with the people in your human resources department before enrolling in Medicare Part B . If they tell you their insurance not Medicare will be primary then I would not enroll in Medicare Part B. 