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).
并不是所有人都必须在65岁申请免费的Part A。实际上,如果你属于上述情况,申请了反而会被罚款,除非你在申请前6个月就停止contribute。