What is the Medicare Dis-enrollment Period? It is the time of year between January 1st and February 14th that you can make certain changes to the choice you made during the Annual Enrollment Period. So, if you think you made a mistake on your choice, watch this video and give me a call, Mark Garrett your Medicare Agent. We are happy to help you make a change. Please visit our site at or call 800-708-5810 for additional information.