Even in economics, you can go a long way before encountering any serious treatment of money. In fact, you can easily go clear through the vast majority of PhD programs without ever discussing what money is. The only exceptions I know of are Chicago and George Mason.

Generally, money is just magically introduced as a unit of account into models that really don't have any monetary dynamics. Most econ programs will have electives on economic history or history of economic thought that get into serious discussions of money.