I don't think a startup really wants to be in this space, even though it seems like a great idea. The size of the necessary workforce, the legal complexities, the complicated interface with government and regulatory bodies and the enormity of the required indemnity make life impossible. I mean Dropbox of all companies has Condeleeza Rice on their board to smooth over dealing with the government - the mind boggles who on earth a successful startup in the healthinfotech space would need on their board, but half of congress might be a start...
I would stop trying to kill yourself dealing with hospitals, it isn't worth it. They are run by either status quo bureaucrats or cost slashers. The only way to reform things is bottom-up - creating applications that patients or clinical staff will use en masse outside of a hospital's IT system eg on their smart phones.