What kind of spider is this?

Looks like a wolf spider, a common type in Maryland. Not poisonous. Escort it outside. It doesn't need to be inside.

We don't have any poisonous ones except black widows which virtually never bite anyone.

Of course, spiders are beneficial because they eat pest insects. Here's more about spiders in Maryland: https://extension.umd.edu/hgic/topics/spiders-maryland

Ellen