How should frozen pizza be stored?

To avoid partial thawing during transport, do not select a frozen pizza until you are ready to check out. The pizza and other refrigerated or frozen foods should be bagged together. Freeze the pizza as soon as you arrive home, and keep it that way until you intend to bake it.  It is important to keep pizzas and other frozen foods out of the danger zone of 40°F to 140°F.  Discard pizza if it is held at a temperature above 40°F for longer than two hours.
 
Source(s):
LG&E "Food Safety"