Chronic maxillary sinusitis

This code signifies a persistent inflammatory condition affecting the maxillary sinus, characterized by symptoms lasting 12 weeks or longer. It involves chronic inflammation and often thickening of the sinus lining, leading to impaired drainage and recurrent infections.

Apply this code when documentation clearly indicates a diagnosis of chronic inflammation specifically within the maxillary sinus. This diagnosis is typically supported by patient history of prolonged symptoms, physical examination findings, and often imaging studies such as CT scans confirming maxillary sinus opacification or mucosal thickening.

• Ensure the documentation specifies "chronic" and "maxillary" to differentiate from acute or other sinus involvement.
• Do not use this code for acute maxillary sinusitis; refer to the J01.- series for acute conditions.
• Consider co-reporting with codes for associated conditions like nasal polyps (J33.-) if present and documented.