The snow storm we just had ripped my vent pipe for a powder room with toilet and sink, about 1/4 inch above the elbow where it comes out of the house, The pipe went up above the bedroom roof. Do I have to replace this or can I leave it the way it is.

Is the break inside or outside the house? Let me know, tom

The break is outside the house

Unless you can see a problem, like the fitting coming apart, I'd leave it. It's outside the house in a dry vent.
What's the situation now? Regards, tom