The Medicare Open Enrollment Period ended on December 7, 2018. Any changes you made will be effective January 1, 2019. If you changed your prescription drug plan, you should receive a letter within 10 days of the receipt of your new enrollment request. Be sure and watch the mail for more information from the plan and your new cards to use at the drug store in 2019. Remember, you can pay plan monthly by mail or you can set it up on monthly bank draft. Monthly bank draft forms should be included with the information you get from your new plan. And, you can always call the prescription drug plan at the number shown on your new cards.
If you were happy with your 2018 prescription drug plan and decided to stay with the plan, then you do not need to do anything. It will simply continue.
May God bless you with good health in 2019!