How are diagnoses assigned to a line item when multiple diagnoses exist?

• A. Using diagnosis pointers to link the line to the various relevant diagnosis codes listed on the claim.
• B. By duplicating the line for each diagnosis code.
• C. By randomly selecting one diagnosis code per line.
• D. Diagnosis codes are not linked to line items.

Answer: (C)

Diagnoses are linked to a line item through diagnosis pointers. On the UB-04, each line item has fields that point to one or more ICD-10-CM diagnosis codes listed on the claim. By assigning these pointers, the line item shows exactly which conditions justify the service and which diagnoses apply to that service. This lets a single line item reflect multiple diagnoses without duplicating lines, simply by linking the appropriate codes to that line item with the pointer numbers. Duplicating lines or randomly choosing a single code would miss or misrepresent the full clinical justification, and not linking diagnoses would leave the rationale for the service unclear.