Yes I have. But I have an undertanding supervisor who wants to make sure I'm ok first and foremost, "the work will always be there so don't worry about that," is what she tells me. She also has a master's in counseling, so I feel ok telling her certain things as needed. I told because initially I was doing so well at work, but I felt myself slipping and decided I just needed to go the hospital, and that's how it came out. Other coworkers just knew I was out sick but not why. The first hospitalization everyone was so understanding. I even got a get well soon card from my supervisor's supervisor! But since I haven't really been stable since, I'm sure I get on their nerves and they can't do and nothing about it because I'm disabled! Hahahaha!!!
But honestly, my employer has damn good benefits and I take advantage of them ALL! And we specialize in psychology, so...they kinda have to be understanding and flexible.
I know not everyone is lucky to have a good experience with having their employer know. But only you can know for sure if you feel comfortable sharing. And if you are worried and skeptical, I wouldn't do so. And that really should be handled by HR with documentation.