Yes, to some degree I've experienced discrimination, typically from healthcare workers, concerning my issues with anxiety and depression.

Though I'm not sure this counts as discrimination, I once had a psychiatrist call me weak after admitting myself to a psych unit when I was feeling suicidal. This was a long time ago but it stuck with me. He literally said that "only weak people admit themselves to psych units", which made me wonder why on earth he was working as an inpatient psychiatrist.