My family knows because they were the ones who forced me to begin seeking treatment in the first place, but apart from that only a couple of my very close friends (who I've known since childhood) know about my diagnosis.

There have been a few occasions where I've considered telling a couple of my coworkers about it (for some reason the topic of BP has come up during our lunchbreak more than once) but I decided against it and I think that was the wise and prudent decision.

PS: I don't think you necessarily need to say that you're asking for accommodations specifically because of BP. You probably just need to get a doctor's note stating that you have a mental health condition that requires you to need extra time or whatever.