YES they get caught....its just not talked about..it happens ALL the time
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On April 13, 2021, a New York-based chiropractor, was sentenced to nine years in prison, and ordered to pay close to $20 million, for running what the federal government alleged was a large scale scheme to defraud Medicare and other third party insurers.

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https://www.jdsupra.com/le...

The litany of illegal behavior alleged by the government also included:
❌Submission of claims for medically unnecessary items services and items;
❌Submission of claims for services which were never rendered;
❌Double billing the same service to 2 different insurers (e.g., billing Medicare and No-Fault Insurance for the entire cost of the same service);