In the last few years I've spent almost a triple number of days in hospitals (not as a patient). I can tell you from first-hand experience that most patients that are hospitalized —except in the ICU— do not need multiple doctor visits per single day. Maybe they need a couple different specialties, but certainly they do not need multiple doctors of the same specialty in the same day or more than a few specialties.

As has been pointed out in many submissions on HN about USA's medical practices, the main reason you get many visits is to inflate your bill. I think someone even wrote that he was charged $600 per 1-minute visit during his stay in the hospital.