That's the problem with the media. Now that we can watch things as they happen, the media is in such a rush to show us the news that they present the story before they know all the facts.
That hospital, by the way, is like a city within a city -- takes up several blocks of Washington Heights. I'm not surprised Sec. Clinton had to go to another building within the complex for tests. I suspect the move was done in this manner to protect her dignity, since she does travel with an entourage and would be very noticeable. Another patient would have been moved on a stretcher, maybe in an ambulette.