I think that's a great idea.
I don't think it needs to be a start-up, but maybe the AMA, FDA, or whomever could put together a simple list of medical preventable errors, and publish that list in a easy to read format.
Just put the information out there. After my bypass; that will be the first book, or website I'm looking for.
Someting like, "After the first heart attack, an aspirin might prevent the second heart attack."
Something that would legally protect the Doctor.
It seems like the entire system is so afraid of lawsuits they just give the bare minimum of advice. And then there're the doctors who just don't really care.