Dr. Ron Ramirez is a plastic surgeon who works in third world countries.
Before Turk began working at Sacred Heart, Ron worked with Carla and she developed a crush on him, even though he was in a relationship. He left to work to go fix cleft palats in third-world countries, and came back three years later. Although Carla was engaged to Turk, she still accepted his offer to take her out to dinner. There, she realized that she no longer had feelings for him, which calmed some of her pre-marital jitters. ("My Moment of Un-Truth")