Yes. If you use a Special Enrollment Period (SEP) to change Medicare drug plans during the year, you will find that both the total retail value of your drug purchases and the total value of your out-of-pocket spending (TrOOP) transfer to your new Part D plan.
Maybe. If you are able to change or transfer to another Medicare Advantage plan offered by the same company during the plan year, you may be able to transfer the amount that you have spent for your Medicare Part A and Part B coverage toward your new plan's MOOP limit.
The Special Election Period (or SEP) for "Change of Residence" becomes available when the beneficiary is moving out of his/her Medicare plan's service area.
What is the timing of this Special Ele . . .
If you use a Special Enrollment Period to change Medicare Part D drug plans during the year, your drug purchase history moves with you to your new Medicare plan. So if you are in the Donut Hole and move to another Part D plan, most likely you will still be in the Donut Hole.