Here is an article alleging the dollar size of the scheme:
https://sputniknews.com/us/201503201019799277/
Here are articles related to a doctor in the scheme:
Here is an article relating to the sentencing of the ring leader to 15 years.
https://nypost.com/2016/01/29/fraudster-who-bilked-victims-out-of-17m-gets-15-years-in-jail/