Source: N.C. Aizenman, The Washington Post

How much do hospitals and doctors actually charge insurers for their services? How much and which of those services are privately-insured patients using? And, most significantly, what drives changes in health-care use, costs, and total spending? They are among the most vexing questions in American health care. And a recently amassed trove of data from insurance companies could soon shed new light on them.

Read Full Article: Data trove may shed light on health-care uncertainties