Congenital absence, atresia and stenosis of ileum

This code describes a birth defect where the ileum, the final section of the small intestine, is either completely missing (absence), abnormally closed (atresia), or severely narrowed (stenosis). These conditions obstruct the passage of food and digestive contents, leading to symptoms such as abdominal distension, vomiting, and failure to pass meconium in neonates.

Use this code for congenital malformations of the ileum identified at birth or shortly thereafter. Documentation should clearly specify the ileum as the affected segment of the small intestine and confirm the congenital nature of the absence, atresia, or stenosis. This code is typically supported by imaging studies (e.g., abdominal X-ray, contrast studies) and surgical findings.

• Differentiate from acquired strictures or obstructions of the ileum, which would be coded differently.
• Always review operative reports and pathology findings for precise anatomical location and nature of the defect.
• Consider sequencing this code as the primary diagnosis when it is the reason for admission or surgical intervention.