Google's announcement of a partnership with a major healthcare provider raises fresh privacy concerns as the tech company expands its footprint into the healthcare industry. Monday's announcement comes after the Wall Street Journal revealed Google had won access to health-related information of millions of Americans across 21 states through the partnership with Ascension – the second-largest healthcare system in the US. The Journal reported that the data involved in the project includes lab results, doctor diagnoses and hospitalization records, among other categories, and amounts to a complete health history, including patient names and dates of birth. The collaboration, code-named "Project Nightingale", began in secret last year, according to the Journal. Google's parent company, Alphabet, on Monday officially signed Ascension, its biggest cloud computing customer in healthcare yet.