"Good. I'll let you tell them what's wrong with them while I do what I need to do to fix it."

He'd probably have been better suited to lab work, but it's not quite the same. He actually likes figuring out what's wrong with a person and helping them. Right now, he's worried about Jim, and worried that the doctors in the med bay won't take him seriously and let him examine patients. Fortunately, they all appear to be too busy to care.