Can someone explain what this is and if it's legitimate. I am pushing 65 and today, I received in the mail what is called a "Medicare Open Enrollment Inquiry Card". They tell me I have "only one open enrollment period" and then I am suppose to fill it out and mail it back in. They want my Name, date of birth, spouse and his date of birth, and phone number. Plus, I am suppose to check the box that states: YES, Also send me information on prescription discounts. Then I am suppose to mail it back to SD Reply Center PO Box 2528, Rockwall TX 75087-9973. Is this something I really need to do or is it some company trying to get my information to sell me insurance, etc.? I am satisfied with the insurance I have now so I am not going to change. Any help is appreciated. Thanks!