Bro, doctor patient confidentiality supercedes this legal implication. There is no ability for the doc to call the cops. If he does he will lose his license to practice for violating confidentiality. How do you think people get treated for alcohol/drug abuse, etc. No, they can't report an overdose.
The insurnace company has access to treatment files no mattter what is written in there. So, yes the insurance company could find out.