That is important too. When your shopping for a plan. Check each plan to see what the medsYOUR on will cost you out of pocket. Tier one is free thru Tier 4 which will cost you the most. Plus there is this thing called the “doughnut hole”.After your plan pays a certain total dollar amount, the part they pay goes down and the part you pay goes up. To a certain total out of pocket for you. One drug I take started out costing me $47.00 month. Then you hit the doughnut hole and I pay $204.00 a month for the rest of the year.