There are good arguments to be made about your point, but I don't think this is necessarily one of them. As the article quotes, "The data is anonymous, but it allows us to see where those folks have gotten care."

What Amino has done can easily be done with anonymized data. They only need to know patient age, patient gender, physician, location of physician, what the physician billed for (I assume the ICD-9 codes). I doubt there's enough information there to identify individuals.