I've googled "hospital procedure, clinic, walk-in clincs" but mostly get articles about the benefits or detriments to having said clinic in a hospital--the rest are just hospital web pages talking about their clinics. I've LJseeked "hospital procedure" here, but all the procedure questions that came up deal with more serious issues than I have and none that relate to clinics.
Dilemma: I want my character to go to a hospital clinic to get some abdominal pain checked out. What I need to know is if a doctor does get clinic duty (like they show in House all the time)? Or is it always just a nurse? And if something serious is discovered (say, appendicitus in my character's case) would the patient be rushed for surgery right away? Or would there be a litany of tests and things to confirm? Basically, would the hospital let him go back home and wait another day?
Edit: Thanks everyone! Those are some very helpful answers!