Think of it as a health policy wonk’s dream: Football stadium after football stadium packed to the brim with...health insurance claims data.
An odd dream, to be sure. But health insurance data is crucial to understand how health care dollars get spent. It shows how people use health care, what’s changing and, in some cases, why. Health insurers, however, have tended to keep that data private, as it could tip competitors off to how they handle business.