Resorption atelectasis without respiratory distress syndrome

This code identifies a type of lung collapse in a newborn, specifically caused by the reabsorption of air from the alveoli, leading to a reduction in lung volume. Crucially, this condition occurs without the presence of respiratory distress syndrome (RDS), which is a distinct and more severe pulmonary disorder in neonates.

Use this code when documentation indicates atelectasis in a neonate that is attributed to resorption, and there is explicit documentation ruling out or not mentioning respiratory distress syndrome. This often applies to cases of mild or localized atelectasis identified on imaging, where the infant does not exhibit the classic signs of RDS.

• Ensure documentation explicitly states "resorption atelectasis" and clarifies the absence of respiratory distress syndrome.
• Do not code with P22.0 (Respiratory distress syndrome of newborn) due to the Excludes1 note.
• Consider other causes of neonatal atelectasis if resorption is not specified, such as P28.0 (Primary atelectasis of newborn).