Pressr collapse of lung due to anesth during preg, first tri

This code signifies a pneumothorax or atelectasis caused by anesthetic complications during a surgical or diagnostic procedure performed on a pregnant patient in her first trimester. The lung collapse is directly attributable to the effects of anesthesia, such as improper ventilation, airway obstruction, or adverse drug reactions.

Apply this code when documentation clearly links a pressure-induced lung collapse (e.g., pneumothorax, significant atelectasis) to the administration of anesthesia during a procedure in a pregnant patient within the first 12 weeks of gestation. The physician's notes should explicitly state the causal relationship between the anesthesia and the respiratory complication.

• Ensure the documentation specifies "pressure collapse" or a similar mechanism, differentiating it from other causes of lung collapse.
• Verify the trimester of pregnancy is explicitly stated as the first trimester.
• Always sequence this code after the primary obstetric code (e.g., O9A.2- for complications of anesthesia during pregnancy) if applicable, or as the principal diagnosis if the anesthesia complication is the reason for the encounter.