If it seems that the GU0 record for medical billing has no end to it, you're not far off. But we're coming around the bend to the finish in good time. This installment begins with field number 46.

Medical billing is sometimes like playing a game of battleship where you blindly plug in pegs to find your opponents ship. CMNs like the GU0 record, with its insane mapping scheme only make matters worse. In this installment we continue with our review of the GU0 record.