I haven't faced too much stigma, just in the medical arena. One time I broke my toe and all the urgent-care doctor wanted to talk about was my psych history. Other times I've had to tell medical people about my bipolar meds and they wanted to talk about that more than anything else.

I have lost a few friends because of this. They didn't say "Oh, I can't be friends with you anymore because you're bipolar", they just sort of slipped away, out of my life, and didn't respond when I tried to ask them why. I sometimes have to remind myself that they weren't truly friends anyway or they'd have been supportive rather than run the other way.