When Can I Enroll In Medicare Part D For 2015? 
If you are turning 65 - you can enroll up to 3 months prior to your 65th birthday with the effective date of plan being effective the first of the month - of your birth month . If you enroll a bit after -LRB- you have up to 3 months after birth month to enroll with a guarantee issue -RRB- then it would be effective the first of the month following your enrollment . So let 's say your birthday is in May : You can sign up for Medicare A & B , and your additional plan -LRB- s -RRB- Feb , March , April , May , June July and August . After that you are no longer guarantee issue and would need to wait till another enrollment period . NOW , if you are working full time and retire , this gives you yet another guarantee issue enrollment period at the month of retirement . -LRB- You still want to enroll in Medicare A & B up to 3 months before retirement - and then the additional plan -LRB- s -RRB- about 1-2 months before that start date of Medicare A & B. -RRB- If you are already enrolled in Medicare and would like to change your RX plan for 2015 then during the `` Annual Enrollment '' period , which is Oct 15th - Dec 7th 2014 - with an effective date of Jan 1 2015 , then you would want to make sure to meet with your agent during this time period . Make sure you , or they , run your RX list through a comparison tool - such as Medicare.gov - to see which of the many plans may best fit your needs . Anyone enrolled in a Medicare Advantage plan or a Supplement along with an RX plan will want to review your Advantage plan or your RX plan every year during this `` Annual Enrollment '' period as plans change and your prescriptions may have changed . Always search for what may fit your needs best . If you have a Supplement plan - you typically do not ever change this plan for another - there are exceptions . Hope that clarifies . Belinda myseniorventure.com/answers 