Chronic sphenoidal sinusitis

This code signifies a persistent inflammatory condition affecting the sphenoid sinuses, characterized by symptoms lasting 12 weeks or longer. It involves chronic inflammation and often structural changes within the sphenoid sinus cavity.

Apply this code when documentation clearly indicates a diagnosis of chronic sphenoidal sinusitis. This typically includes physician notes detailing persistent symptoms such as headache, postnasal drip, or facial pain localized to the sphenoid region, along with imaging findings (e.g., CT scan) confirming chronic inflammation or mucosal thickening within the sphenoid sinus.

• Differentiate from acute sphenoidal sinusitis (473.2) based on symptom duration.
• Ensure documentation specifies "chronic" and "sphenoidal" to avoid miscoding to other sinus locations or acute conditions.
• Consider sequencing with any underlying systemic conditions contributing to chronic sinusitis, such as cystic fibrosis or immunodeficiency.