Had a prescription filled at my local CVS. I normally have drugs mailed to me thru Express Scripts. But I needed this prescription cream now. The pharmacist took my cards, inputing the info. She looked at my Medicare card and said "you know you have Part B?" I said yes I did. Why did she mention this? Is there a reason I should or should not have it? I have Tricare as my secondary. I have heard that people do not HAVE to have Part B. I didn't think about it until I got home or would have questioned her.