Diagnosis pointers and where the are located on a medical claim formDiagnosis pointers are found in field 24E of the CMS1500 medical claim form:
Diagnosis pointers are represented as letters A-L. The diagnosis pointer(s) entered into field 24E of each line item show what diagnosis code(s) entered into field 21 that the service (CPT or HCPCS code) relates to. In the example, the letter "A" is entered into field 24E, meaning that the diagnosis code listed in blank letter A in box 21 of this claim relates to code on that line item (E0486).
You can have up to 4 diagnosis pointers per line item (i.e. ABCD).