Other and unspecified atelectasis

This code represents the partial or complete collapse of a lung or a lobe of a lung due to various causes, excluding specific types of atelectasis that have their own distinct codes. It signifies a reduction in lung volume, leading to impaired gas exchange.

This code is appropriate when documentation indicates atelectasis without further specification of its type (e.g., compressive, obstructive, cicatricial, or resorption atelectasis). It is commonly used for post-operative atelectasis, atelectasis due to hypoventilation, or when the specific etiology is not clearly identified in the medical record.

• Avoid using this code if a more specific type of atelectasis (e.g., due to foreign body, tuberculosis) is documented; those have dedicated codes.
• Always review the medical record for the underlying cause of the atelectasis, as this may need to be coded first or in conjunction.
• Ensure documentation clearly states "atelectasis" or a similar term indicating lung collapse, and that no other specific type is identified.