"Are you!" the Doctor says, a little jerkily given he's having trouble stopping his whole body from being shaken by Zoidberg's enthusiasm. "Well, that's certainly something." Given he wasn't aware that Decapodians had a strong incursion into the medical industry. "I'm afraid I'm not a doctor, however. Not a medical doctor, not in the way you're thinking. It's just my title. My name, if you will."