I agree with madisgram, that most stigma comes from ignorance and preconceived ideas.

Having said that, I am a licensed mental health therapist. I have nerver and will never disclose my dx to my employer or co-workers because it's way too likely to come back to bite me. It burns my backside that there's so much prejudice in the field about practioners with MI issues from other professionals. My symptoms are under control following years of therapy and with meds. I understand not wanting people working in the field who are impaired by their illness, but for those of us who are stable I think it's the height of prejudice!