This is a complex issue because of everyone trying to get that insurance money like the pharmaceutical companies, hospitals (requiring endless tests that are unneeded) along with a whole industry of healthcare providers, secretaries (paper pushers) that all want paid.
I just saw two examples of drug rehab facilities scamming insurance companies for hundreds of thousands of dollars per patient. The first was in Florida where the rehab clinic sent their graduates to a sober living facility (owned by the same people) who then made sure there were drug dealers available to get the residents re-hooked on drugs where they were then sent back to the original rehab facility. This cycle repeated over and over.
The second was a guy in Southern California named Christopher Bathum who is a convicted felon and has no health credentials and runs a rehab center that charges $30,000 a month for services. He then does drugs and fucks the hot women there while soaking up that insurance money.