DOCTOR! Yes! He automatically sniffed the air as the guy stood there and paused very slightly. His scent was oddly familiar, somehow. Huh. Made him think on Lupe, but since he was already thinking about her, there was nothing unusual about that.
"I'm not the patient, no, do I look like I... sorry. It's my friend. She's been..." He trailed off after that and stared at the man, sniffing more obviously now for any hint of... well, anything, really. "You really are a doctor? And you're not gonna... tell anyone?"