Isaiah H. White is listed in Booth's as J. H. White. Its mentions him being a surgeon in the 14th LA. Infantry. There is also a short bio of him at the link below.

http://books.google.com/books?id=KHhNMpDYl04C&pg=PA810&lpg=PA810&dq=%22isaiah+h.+white%22+louisiana&source=bl&ots=0KZDKWkkxQ&sig=MeREUKKechJ0kZguCEFRBgJpc20&hl=en&ei=n-kCTZ_sH4OBlAfQwsmuDg&sa=X&oi=book_result&ct=result&resnum=8&ved=0CDAQ6AEwBw#v=onepage&q=%22isaiah%20h.%20white%22%20louisiana&f=true