Chronic pneumothorax

This code signifies a persistent air leak into the pleural space, leading to a collapsed lung that has been present for an extended duration. Unlike an acute event, chronic pneumothorax implies ongoing or recurrent air accumulation that does not resolve spontaneously or with initial interventions.

Apply this code when documentation clearly indicates a pneumothorax that has been present for a prolonged period, typically weeks to months, or is recurrent despite previous treatment. Supporting documentation would include physician notes detailing the chronicity, imaging reports confirming persistent air, and a history of previous pneumothorax episodes.

• Differentiate from acute pneumothorax (J93.1X) based on documented duration or recurrence.
• Always code the underlying cause of the chronic pneumothorax if known and documented (e.g., emphysema, cystic fibrosis).
• Ensure the medical record explicitly states "chronic" or provides sufficient detail to infer chronicity, such as "recurrent pneumothorax" or "persistent air leak for X weeks."