When coding for a insurance claim, what is the most common mistake that will slow the reimbursement?

~~This could vary somewhat not knowing exactly what you are referring to. However, if you coded something outside the authorization allotment for the procedure it will be rejected. Also, any type of coding which would be excessive to the procedure done. Not only would it slow it down, because you would have to justify the reasoning for the extra billing costs, but it would probably cause the entire claim to be denied. Insurance companies look for any reason to deny claims, that is their business-saving money!~~When coding for a insurance claim, what is the most common mistake that will slow the reimbursement?
Do you mean health insurance. ?? Wrong procedure and diagnostic code.When coding for a insurance claim, what is the most common mistake that will slow the reimbursement?
incorrect diagnosis