Choanal atresia

This code represents a congenital malformation characterized by a blockage of the posterior nasal aperture, preventing airflow between the nasal cavity and the nasopharynx. This obstruction can be bony, membranous, or mixed, and may be unilateral or bilateral. It is a significant cause of respiratory distress in neonates.

Use this code for documented cases of choanal atresia, identified at birth or shortly thereafter. This diagnosis is typically supported by clinical examination (e.g., inability to pass a catheter through the nostril), nasal endoscopy, or CT imaging confirming the obstruction.

• Specify laterality (unilateral or bilateral) if documented, as this impacts clinical management.
• Distinguish from other causes of neonatal respiratory distress, such as nasal pyriform aperture stenosis.
• Consider sequencing with codes for associated congenital anomalies if present.