They typical candidate does not offer up a health assessment from their private physician unless there is good cause for it. She did this - months ago.
There is a very good reason for it, IMO.
I went looking for health assessments after your comment...
http://www.kevinmd.com/blog/2016/04/should-we-be-concerned-about-hillary-clintons-health.html
http://www.nytimes.com/interactive/2015/07/31/us/politics/hillary-clinton-doctor-letter.html
No matter what the docs say she suffers from being a delusional Marxist.
and she did so in a bogus way.
She presented a very brief statement from an obscure physician near Chappaqua, who probably had only seen her for a brief consultation for the purpose of producing the document.
Anyone who thinks the US Secretary of State, living in Washington DC, does not have a top flight DC based physician is ready to buy a bridge I have for sale.
In fact, we know Hillary was under extensive medical care while SofS due to a fall and concussion, it took her weeks to return to work and she was out of public view during that time.
So, her little “physician’s statement” gambit stinks to high heaven and there is certainly something serious about her medical condition that she is trying to hide.