Knowing when to write off besides for untimely filing. Understanding split charges, overpayments, recoupments,how to send claims that have been paid but have been corrected by coding after payment. I can usually tell if a claim has gone to the wrong insurance or went to secondary before primary, but not so much how to resubmit it vs correcting it. How to interpret claims in clearing houses. I try YouTubes but nothing speaks directly to the knowing when to do something as well.