TrOOP and MOOP are two different measures of out-of-pocket (OOP) costs - and TrOOP and MOOP are not related, aside from both defining OOP costs - and your TrOOP does not count toward your MOOP.
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TrOOP or your total out-of-pocket cost is the total amount you will spend in a year on your formulary drugs before exiting the Coverage Gap (or Donut Hole) and entering the Catastrophic Coverage of yo . . .
Cost-sharing refers to the portion of your Medicare Part D plan coverage or Medicare Advantage plan coverage that you pay (such as $30 to fill a brand-name prescription or $20 to visit a doctor).
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