Why can I not add more than 4 diagnosis to a charge line?
Only allowed 4 diagnosis pointers
You can list up to four diagnosis pointers per service line.
While you can include up to 12 diagnosis codes on a single claim form, only four of those diagnosis codes can map to a specific CPT code. That is because the current 1500 form allows space for up to four diagnosis pointers per line, and that will not change with the transition to ICD-10.