Lung involvement in systemic lupus erythematosus

This diagnosis code signifies the presence of pulmonary manifestations directly attributable to systemic lupus erythematosus (SLE). It encompasses a range of lung conditions, such as pleurisy, interstitial lung disease, pulmonary hypertension, or alveolar hemorrhage, when they are a direct consequence of the underlying autoimmune disorder.

Apply this code when a patient with a confirmed diagnosis of SLE presents with documented lung involvement that is clinically determined to be related to their lupus. Supporting documentation should clearly link the respiratory symptoms or findings (e.g., imaging, biopsy results, pulmonary function tests) to the systemic autoimmune disease.

• Always sequence the underlying systemic lupus erythematosus code (M32.10-M32.19) first, followed by this code.
• Do not use this code for lung conditions that are coincidental or clearly due to other causes (e.g., infection, smoking) in a patient with SLE.
• Ensure the medical record explicitly states the lung involvement is "due to" or "associated with" SLE.