If the pie you baked is not fully cooked and you want to cook the pie more and get it fully cooked then yes you can cook an undercooked pie and put the undercooked pie back in the oven for a few more minutes or until it's actually fully cooked.
The best way to cook an undercooked pie in the oven again is to cover the pie with aluminum foil, place it back in the oven and bake it at 425 to 450 F for around 12 minutes.
Once the bottom crust cooks all the way through, reinsert the filling and place the top crust back on the pie as a crumble.
Pies take between 30 minutes to 45 minutes to bake depending on the type of pie.