When Can You Sign Up For Medicare D? 
You can sign up for Medicare Part D when you turn 65 . If you are already 65 but have not previously gotten Part D because you had credible drug coverage from your employer , and you are now losing that coverage , you can sign up within 60 days of losing that coverage . There are other exceptions in which you can sign up throughout the year , but if you do n't have a `` Special Enrollment '' situation , then you would have to apply during open enrollment , which is Oct 15 - Dec 7th . 