On the CMS-1500 form, which field indicates the diagnosis code?

On the CMS-1500 form, which field indicates the diagnosis code?

• A. Block 21
• B. Block 24D
• C. Block 33
• D. Block 26

Answer: (A)

The field labeled Diagnosis or Nature of Illness is where you place the ICD-10-CM diagnosis codes. This area is designed to capture the patient’s conditions for the encounter, and you can list multiple codes (up to twelve). For each line item on the claim, you use diagnosis pointers to show which of the listed diagnoses apply to that service. In short, the diagnosis codes live in the Diagnosis or Nature of Illness field, and the service lines reference them with pointers.

The field labeled Diagnosis or Nature of Illness is where you place the ICD-10-CM diagnosis codes. This area is designed to capture the patient’s conditions for the encounter, and you can list multiple codes (up to twelve). For each line item on the claim, you use diagnosis pointers to show which of the listed diagnoses apply to that service. In short, the diagnosis codes live in the Diagnosis or Nature of Illness field, and the service lines reference them with pointers.