Chronic frontal sinusitis

This code represents a persistent, long-term inflammation of the frontal sinuses, characterized by symptoms lasting 12 weeks or more. It indicates a chronic infectious or inflammatory process affecting the air-filled cavities located above the eyes.

Assign this code when documentation clearly states "chronic frontal sinusitis" or describes persistent inflammation of the frontal sinuses for at least 12 weeks. Supporting documentation should include physician notes detailing the duration of symptoms, diagnostic findings (e.g., imaging), and treatment plans.

• Differentiate from acute frontal sinusitis, which has a shorter duration of symptoms.
• Do not use this code if the documentation specifies an acute exacerbation of chronic sinusitis; a combination code may be more appropriate.
• Look for specific laterality (e.g., right, left, bilateral) if documented, as more specific codes may exist in other code sets.