PHAIN.health (meaning “to shed light” in Greek) is a Precision Health AI Navigator founded by former Merck executive and physician Dr. John Cai to empower patients and tackle the high costs associated with non-communicable diseases (NCDs) like cancer, mental illness, diabetes, and obesity. PHAIN.health’s primary value proposition is its ability to use AI-assisted healthcare pathway navigation to solve two massive industry pain points: it alleviates the fear and confusion patients face by offering a B2C healthcare coaching app that allows for shared decision-making, while simultaneously saving providers, payers, and pharmaceutical companies millions by avoiding costly “off-pathway” treatments.