Yelling at a person with mental illness is not excusable just because the ER doc is concerned about someone's well being. In fact, it's likely against the hospital's own Patient Rights agreement. People with mental illness are not doing things because they are bad or behaving badly, and a doctor should know better. Yelling at a psych patient ONLY makes it harder for them, as has happened with the OP. The oath of "first do no harm" was violated here. Just because we have mental illnesses doesn't mean we don't deserve dignity and respect. I'd have filed a grievance against this doctor if I were the patient. If I'm in the ER because of my disorder I guarantee I'm already having a bad enough time without some judgmental ER doctor who doesn't understand mental illness yelling at me like it's somehow my fault I'm sick.

Sorry, not sorry, but no.