I know of someone that has generated 10's of thousands of dollars in fake billings. Its easy and this person feels some kind of immunity from prosecution. I'm pretty sure this practice is rampant among the medical community.
I won't play into the system. I'm self-insured and will grind them down any time I need them and have to pay cash. I will also seek out medical help out of the country when I need it.
If something major happens to me, I will grind them down to 10% of the billing.
My 0.02