(CNN) — Dr. Esther Choo is an Asian-American emergency room physician who has practiced medicine for more than a decade. Yet, she says, a few times a year, a patient will refuse to let her treat them. Solely because of her race.

Choo, who works in Oregon, first shared her experience of dealing with racist patients who shun her care in a viral Twitter thread last Sunday.

“The conversation usually goes like this. Me: ‘I understand your viewpoint. I trained at elite institutions & have been practicing for 15 years. You are welcome to refuse care under my hands, but I feel confident that I am the most qualified to care for you. Especially since the alternative is an intern.’ And they invariably pick the intern, as long as they are white. Or they leave,” she wrote in successive tweets.

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