Question: If a patient has a diagnosis of acute sinusitis, how should I choose the ICD-10 code to report? AAPC Forum Subscriber Answer: You’re going to need some more information in order to code this condition correctly. Get a copy of the encounter notes; then, see if your provider noted any of the following more specific acute sinusitis diagnoses: If all else fails: Report J01.9- (Acute sinusitis, unspecified).