Yeah I don't tell any of my coworkers what's really going on. But then, I don't feel I have to justify my absence to anyone but my boss. Even then, I just tell my boss I'm sick. As long as i don't go beyond my allowed sick days he doesn't ask questions.

Of course now I have to admit i was inpatient because the letter for work will be on the clinic's letterhead....otherwise it won't be official enough for work. they won't accept just a prescription blank with the dates. but i hope he doesn't tell anyone else. I HOPE.

the rumor mill at my work is pretty vicious.

personally I would just do as they say because I hate hassle but if you're up to it take it up the chain of command.