January 1 - March 31 - If you are not satisfied with your Medicare Advantage Plan, you may be able to switch plans between January 1 and March 31. You can only make one change during this time period and you may not add or drop Medicare Part D prescription drug coverage. Please call 1.877.847.7915 in the Ohio Valley and Mountaineer Regions and 1.877.236.2290 in the HomeTown Region. You can also look at the information on our website or fill out a form to Request More Information.