Toxic effect of sulfur dioxide

This code represents the adverse health effects resulting from exposure to sulfur dioxide (SO2). It encompasses a range of symptoms and conditions, primarily affecting the respiratory system, due to the toxic properties of this gas. Manifestations can include irritation of mucous membranes, bronchospasm, and pulmonary edema.

Use this code when documentation clearly indicates a patient's illness or injury is directly attributable to sulfur dioxide exposure. This typically occurs in industrial settings, chemical spills, or volcanic gas exposure. Supporting documentation should detail the exposure event, the specific substance (sulfur dioxide), and the resulting clinical signs and symptoms.

• Always sequence this code as the primary diagnosis when the toxic effect is the reason for the encounter.
• Ensure documentation specifies sulfur dioxide; avoid using for general gas exposure without identification.
• Consider additional codes for specific symptoms or conditions caused by the toxic effect, such as acute bronchitis or chemical pneumonitis.