A certain patient often comes to your office for cancer treatment. When this patient comes in with a sore throat caused by the flu, what is the primary diagnosis according to the ICD-9-CM?

Question

Quizplus · Accepted Answer

The primary diagnosis according to the ICD-9-CM for a patient coming in with a sore throat caused by the flu would be the flu (B), as it is the main reason for the visit and the condition being treated at that time, despite the patient's history of cancer treatment.

A Certain Patient Often Comes to Your Office for Cancer