Up-to-Date (really any online/print medical reference), general med school knowledge and fellow residents should all yield the required information fairly quickly.
I guess my confusion lies in the resident part. If you're in a specialty that manages diabetes as an outpatient, by this time of year I'd expect an intern to know this. Now, if this is a medicine resident that started their first outpatient rotation yesterday, then that might be a different story.
In looking over previous posts by said poster, I'm having some doubts. It looks like this person doesn't know how to look things up and either has very little back-up or has malignant back-up that he/she doesn't feel comfortable asking questions to.