Would doctors check for pernicious anemia with standard hospital bloodwork for a 58 yr old female admitted with confusion?

Because : It can be treated before there is too much damage.

They likely would: Yes, pernicious anemia would likely be tested as it could be one of possible explanations for confusion. If it is treated early, further damage may be prevented.

Confusion: Comprehensive metabolic panel and blood work are routine in workup for causes of confusion or delirium.

Pernicious anemia: Checking blood count is routine as part of the comprehensive workup for delirium or confusion.