Dr Marty Makary, author of "Unaccountable: ... How Transparency can Revolutionize Healthcare" has so many excellent anecdotes, and excellent examples of how transparency can transform healthcare:
See the Health Data Portal - New York State (powered by Socrata). See also, the nearly-impossible -to-navigate NY govt data portal
See below for useful tools for the Safety Culture (fishbone diagram) and see the Safety Culture Survey questions, by AHRQ
See the download of CMS data on Complications and Deaths in all Hospitals in the USA, including CABG mortality rates.
More under "Hospital Metrics".