And It Took 7 Years To Notice?

From the Houston Chronicle: A Houston doctor has been charged in a $158 million Medicare fraud case involving false claims for mental health treatment, officials said.
Sharon Inglehart, 56, made her first court appearance this week in the federal investigation that also resulted in related charges against others.
Inglehart was charged with four counts of health care fraud and one count of conspiracy to commit health care fraud, officials said.
From 2005 to 2012, Inglehart took part in a scheme to submit about $158 million in false claims for treatment at a Houston hospital for patients with severe mental illnesses, federal prosecutors said.
But, the outpatient care was both never provided and unnecessary, prosecutors said while announcing the indictment.
The investigation also ensnared several hospital employees who were accused in 2012 of accepting and receiving kickbacks for their alleged roles in the scheme, officials said.  http://www.chron.com/news/houston-texas/houston/article/Houston-doctor-charged-in-158-million-Medicare-5076586.php?cmpid=hpts
So, for 7 years, at $22,571,000 a year, or $61,000+ a day for 365 days a year, and the Fed's finally noticed it?
How may more cases are out there?
Hundreds?  Thousands?