I don't know. I don't want Google to handle my health records. It just creeps me out. I don't know why.
I am not sure exactly what is being proposed here, but today there is HIPPA. Without your personal authorization your medical info cannot even be released to your family.
There is or maybe by now (info is some years old and no hits in Wakipedia)) was a little known subscriber organization called MIB (medical insurance bureau) which had access to ALL of your medical info and this is/was how insurance companies could determine your health status and decided what, if any, insurance coverage they would provide.
Daryl