If you would like to continue making contributions to your HSA, you can delay both Part A and Part B until you (or your spouse) stop working or lose that employer coverage. You will NOT pay a penalty for delaying Medicare, as long as you enroll within 8 months of losing your coverage or stopping work (whichever happens first).
並不是所有人都必須在65歲申請免費的Part A。實際上,如果你屬於上述情況,申請了反而會被罰款,除非你在申請前6個月就停止contribute。