Dr. Bonnie Chang is a surgeon at Sacred Heart Hospital.
Bonnie and Turk entered as surgical interns in the same year. They participated in several surgeries together, including David Morrison's. ("My Old Lady") Later that year, she was assigned a Whipple patient that Turk wanted. When Turk approached Dr. Wen about it, he ended up insulting both Bonnie and Dr. Wen by making a comment about them both being Asian. ("My Hero")
Later, Dr. Wen confirms to Turk that Bonnie is the best surgical resident at Sacred Heart. When Dr. Kelso picks Turk to go to Mexico for Doctors without Borders, Bonnie is upset and Turk rubs it in her face. Dr. Wen then tells Turk that she wasn't chosen because she is a woman, and Turk apologized and gave the trip to the Todd. ("My Big Mouth")