Surfactant mutations of the lung

This code identifies genetic alterations in surfactant proteins, which are crucial for maintaining alveolar stability and preventing lung collapse. These mutations lead to dysfunctional surfactant, causing various forms of interstitial lung disease, particularly in infants and children. The condition can manifest as chronic respiratory distress and progressive lung fibrosis.

Use this code when documentation explicitly states a diagnosis of lung disease due to surfactant protein mutations, such as SP-B or SP-C deficiency. This diagnosis is typically confirmed through genetic testing and often presents with symptoms of chronic respiratory failure or interstitial lung disease. Supporting documentation should include genetic test results or a physician's definitive diagnosis linking lung pathology to surfactant gene defects.

• Ensure the documentation specifies "surfactant mutations" and not just general interstitial lung disease.
• Do not use this code for other forms of interstitial lung disease without confirmed surfactant gene involvement.
• Consider sequencing this code as a primary diagnosis when it is the underlying cause of the patient's lung condition.